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STAAD.Pro V8i SS5, Build 20.07.10.41 ( 26 November 2013)

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Current Revision posted to RAM | STAAD Wiki by Carlos Aguera on 3/8/2018 1:16:56 PM

What's New in STAAD.Pro V8i SS5, Build 20.07.10.41 ( 26 November 2013)

Issues addressed in:-

(A) Issues addressed in the Analysis/Design engine (81)

A) 01 The Australian steel design module AS4100 has been updated to improve the solution of the interaction equation (cl8.4). Previously the program did not consider alpha-s in calculating the allowable bending capacity. However, the design output did display the correct allowable capacities. Thus using the values in a detailed output, the value of the interaction ratio is not obtained.

A) 02 The ASCE 10-97 code has been updated to correct the calculation of axial capacity of angle sections. The value of 'w' was smaller than required resulting in conservative designs.

A) 03 The Eurocode 3 design module EN 1993-1-1 is updated with an additional National Annex to the Swedish standard SS-EN 1993-1-1:2005/AC:2009

A) 04 (issue resolved in STAAD.Pro 20.07.09.20 but not documented) The moment capacities of single angles designed to the AISC 360-05 or AISC 360-10 codes were updated to use the correct section modulus

A) 05 The AISC 360-10 and AISC 360-05 design codes have been updated such that if a section is designed defined from a UPT where the shear areas are specified in the UPT, then those values will be used rather than internally calculated .

A) 06 The AISC 360-05 design code has been updated to ensure that the lateral buckling calculations use the geometric section modulus, rather than 0.8*geometric section modulus if the lateral restraint is provided at the maximum moment.

A) 07 The time history definition using a harmonic acceleration has been updated. The units in the GUI are being honoured. Previously, the definition was taken to be in factors of 'g'.

A) 08 The AISC 360-10 design module has been updated for the design of angle sections to ensure that it correctly accounts for the RA/ST parameter setting.

A) 09 The AISC 360-05 design module has been updated for the design of angle sections to ensure that it correctly accounts for the RA/ST parameter setting.

A) 10 The AITC design timber design module has been updated to correct the output when slenderness is the critical condition. Previously the ratio actually displayed the value of slenderness rather than the ratio of the actual over allowable.

A) 11 The AIJ 2002 and AIJ 2005 steel design modules have been updated to ensure the correct value of FT is used in eq. 6.4. This was taken as the minimum of FCZ and FCY rather than FT which could lead to a non conservative situation.

A) 12 The analysis engine has been updated to include the option SET PRINT 8 which will turn off the reporting SELFWEIGHT warnings in the output file.

A) 13 The analysis engine has been updated to address a situation where a file has been incorrectly defined with two sequential analysis commands, but no intermediate commands such as new load cases or PRINT or CHANGE commands. If the preceding load case included self weight, the results for this load case would not be reported correctly. Whilst the format of the file is still not recommended and should be corrected, files that have been created this way will be reported correctly.

A) 14 The design of angle sections for AISC 360-10 and AISC 360-05 have been updated to ensure that when these members are designed about their principal axes, the correct value of beta-w is used for lateral torsional buckling.

A) 15 The analysis engine has been updated to ensure that it supports wind loading definitions that extend over more than 4 lines using the hyphen character as a line continuation character.

A) 16 The IS8000:2007 LSD design has improved the reporting ratio for a compression check. Whilst the design correctly reported that the compression check was the critical clause, the value of the ratio was not correctly reported.

A) 17 The IS800:2007 LSD design has addressed an issue with regard to the design of tapers which although the design was correct, resulted in a crash when displaying the results of the design.

A) 18 The AISC 360-10 output for a TRACK 1 has been updated to clarify that the capacities are for force and moment.

A) 19 The IS13920 concrete design module has been updated to ensure that if the GLD parameter has been set, self weight is correctly accounted for. Previously this would have caused the analysis to crash.

A) 20 THE API design module has been updated to allow the design of sections defined from the HSS Round database.

A) 21 The API design module has been updated to improve the output of a SELECT process where sections may have failed the thickness check and had a warning message posted in the output file. However, if this was not the final section in the SELECT process, this message is not required, thus the design has been updated such that only if the final section in the SELECT fails this check, then the warning message is posted.

A) 22 The AISC 360-05 design code has been enhanced with the addition of the FLX parameter to allow the specification of a the type of lateral torsional buckling restraint for single angles designed on their geometric axes.

A) 23 The AISC 360-05 design of single angles has been updated to ensure that if the member is subject to bending about both axes, then it will be designed about the principal axes.

A) 24 The analysis engine has been updated to allow a local over-ride of the single mass matrix. If a Reference Load Case type MASS is defined, then this will be used for determining the centre of rigidity for rigid floor diaphragms and also used as the mass matrix in seismic or dynamic load cases unless in those cases they include loading which will instead be used to define the mass matrix.

A) 25 The AISC 360-10 design has been updated to ensure that only double angles and double channels are checked as built up and using the CSP parameter.

A) 26 "The AISC 360-10 design of single angles has been updated to ensure correct identification of the stress at the toe of single angles when bending about the geometric axis, and use of clause F10-4a is used when the toe is in tension or F10-4b is used when the toe is in compression. "

A) 27 The analysis engine has been updated to allow the use of the parameter ALL with the DRIFT command which is used with an imperfection analysis. Previously, this would cause the analysis to crash.

A) 28 The AISC 360-10 design for angle sections has been improved to ensure that if an angle is set to be designed about its geometric axes, but fails to meet the criteria in the code, then a warning message is posted.

A) 29 The AISC 360-10 design of single angles has been improved as an additional torsional force was being included in the design due to the eccentricity between the shear centre and the centre of gravity of the cross section. However, as the load by definition in STAAD.Pro is through the shear centre, this should not have been added in and was producing conservative designs.

A) 30 The analysis engine has improved the handling of 2D orthotropic materials used on non-isotropic plates, where the Young’s Modulus (E)in the two directions are significantly different which previously would result in the analysis failing with an error message identified as a ‘bad plate’

A) 31 The calculation of seismic loading has been updated in the analysis engine when using a Reference load case which included self weight commands. Whilst the self weight of beams, columns and plates were included, the self weight of surface objects defined using the SSELFWT command were not included. These loads are now also included in determining the mass.

A) 32 The analysis engine has introduced a test on Multi Linear Springs to ensure that the distance - spring pairs are defined starting with the maximum negative displacement, then increasing to the maximum positive displacement.

A) 33 The analysis engine has been updated to ensure that it recognises XRA, YRA and ZRA as shorter forms of the parameters XRANGE, YRANGE and ZRANGE in a FLOOR DIAPHRAGM command.

A) 34 The member stress values reported for channel sections have been updated to use the correct minor section modulus to establish the stress on either side of the axis.

A) 35 The Indian concrete design module IS456 has been updated with a new parameter MFACE such that where currently the parameters SFACE and EFACE are used to set the location for the shear checks at the start and end of the member, MFACE is used as a flag design the end moments at these locations too. MFACE, 0= at node (default), 1= at SFACE and EFACE

A) 36 The Australian steel design module AS4100 has been updated to correct the compression capacity calculation for General Sections. When lambda,e is <= Lambda,ey the program now calculates the effective area using a reduction from the gross area .

A) 37 The analysis engine has been updated to catch the use of multiple COMBINE parameters in an IS 13920 concrete design. This should be formatted such that there are sequential designs in the file, each one can contain a single COMBINE command. Previously an incorrectly formatted file would cause the analysis to crash.

A) 38 The design of tapered members to the BS5950-1:2000 code has been updated to ensure all variables used in the design are correctly initialised which would previously result in inconsistent designs depending on the previous member design.

A) 39 The AISC 360-05 steel design module has been updated for the design of circular sections, such as HSS Round profiles, which are subjected to axial force, biaxial bending, shear force and a significant torsional force > 20% torsional capacity. The interaction ratio was being calculated as a function of the sum of applied moment over capacity in each direction, i.e.(Mrx/Mcx + Mry/Mcy) instead of evaluating an equivalent resultant over capacity, i.e. (Mr/Mc) which is being done now.

A) 40 The output of the CG location has been updated to provide it to 4 decimal places

A) 41 The analysis engine has been updated to improve the results reported for bending moments of combinations defined that include other combinations that are defined as SRSS.

A) 42 The calculation of shear area of UPT wide flange sections has been updated to correct an error introduced with the addition of the new TF1 and WF1 parameters to allow UPT wide flange sections to have different sized top and bottom flanges.

A) 43 The Steady State analysis has been enhanced with the option to include missing mass.

A) 44 The IS801 steel design module has been updated to ensure that the values of TSA and FLX are being used if set.

A) 45 The analysis engine has been updated to improve handling models which include REPEAT and DELETE JOINT commands for defining nodes. Under some conditions this was leading to a discrepancy in the numbers of solids established by the analysis engine and those expected by the GUI. The result was an error reported by the GUI when opening the results data.

A) 46 The warning reported in the output file when using floor or one way loads has been updated to point to the revised description in the technical reference manual

A) 47 The processing of the Individual Modal Response (IMR) option in a response spectrum load case so that load cases that are created as a result of this setting can be combined with others with a REPEAT LOAD command.

A) 48 The Eurocode 3 design module EN 1993-1-1 is updated with an additional National Annex to the German standard DIN-EN 1993-1-1

A) 49 The cold formed section design module AISI has been improved where a member is designed iteratively in a single run. The torsional moment of inertia in the section in the second and subsequent designs was not getting correctly updated if the section changed.

A) 50 The cable analysis has been updated to ensure that if a member is made INACTIVE for a set of load cases, any pre-tension forces defined in that cable member are also removed.

A) 51 The EN1993-1-1 steel design module has been updated for the design of GENERAL UPT sections. If the values of PY, PZ, SY or SZ have not been entered, then these will be calculated assuming the section is a wide flange section with the dimensions provided.

A) 52 The Canadian CAN/CSA A23.3-94 design of finite elements has been corrected to ensure that alpha >=0.67 and that the expression for calcuating the reinforcement percentage is taken as (PHI_S*FY*FY)/(2.0*ALPHA1*FC*PHI_C), previously PHI_S had been squared.

A) 53 The Canadian steel design S16-01 has been updated to ensure that angle profiles that are classified as class 4, slender, are checked for combined tension and bending if required. Additionally the effective area and effective yeild stress routines for these sections have also been updated.

A) 54 The AISC 360-05 design for single angles has been updated to improve the calculation of Beta-w to match the values published in table C-F10.1

A) 55 The IS800 LSD design code has been updated to improve the design of sections where the web is suseptible to shear buckling, i.e d/tw>67. Previously a deduction was made for both major and minor axes, which at times could result in a negative minor axis capacity. The deduction is correct for the major axis, but no deduction is required for minor axis.

A) 56 The TRACK 2 output of an AISC 360-05 design of single angles has been updated to include an indication as to which axis has been used in the design, either geometric or principal.

A) 57 The AISC 360-05 steel design has been updated to establish the classification of the web using H/tw, where H is the clear distance between the flanges less twice the root radius. Previously no reduction for the root radius was included. This is now being done for for AISC W, M, S and HP sections.

A) 58 The AISC 360-05 design of single equal angles has been updated to ensure that the reduction factor of 0.8 is not used when calculating the limit state for yeilding.

A) 59 The AISC 360-05 design of single equal angles has been updated to ensure that the reduction factor of 0.8 is not used when calculating the moment capacity for leg local buckling.

A) 60 The EN 1993-1-1 design with a Dutch National Annex has been corrected if torsion checks are included (TOR 2), to ensure that the correct total torsion to be checked is accounted for.

A) 61 A new parameter FLX has been added to the AISC 360-10 design engine such that:- FLX = 1; no lateral torsional restraint, FLX = 2; lateral torsional restraint present, FLX = 3; lateral torsional restraint at point of Maximum Moment

A) 62 Torsion Design to Design Guide 9 has been added to the AISC 360-10 for the following section types, wide flange, W, M, S and HP, channel, C and MC, angle sections, tee sections, pipe and HSS round and tube and HSS rectangular sections.

A) 63 The Canadian design code S16-09 has been added to the range of steel design codes available for use with the STAAD CAN/AUS/SA SELECT license pack.

A) 64 The analysis engine has been updated to ensure that if a model includes notional loads and a SELECT command, then the data is processed correctly. Previously this would have caused a failure in the engine and no results produced.

A) 65 The time history loading has been enhanced to allow any mass not captured in the eigen solutions to be accounted for when a time load is applied.

A) 66 The EN1993-1-1 steel design module has been improved for designing General sections. If a value of DEE has been defined, the specified value will be used for design. If DEE has not been defined or has been set to zero, DEE will be calculated internally as (Total Depth - 2 * flange thickness). Previously the calculation was used even with a specified value in the section definition.

A) 67 The AISC 360-10 code has been updated to ensure that when designing angle sections the value specified using LX is used as Lb in the code.

A) 68 The analysis routines that create the Individual Modal Responses (IMR) in a response spectrum load case have been enhanced to allow additional load cases to be defined after the response sepectrum load case which previously would have been incorrectly referenced.

A) 69 The analysis engine has been updated to process models which include a set of load cases followed by a PERFORM NON LINEAR ANALYSIS and CHANGE then additional locad cases followed by PERFORM CABLE ANALYSIS and CHANGE command. Previously a file fomatted in that way would not be processed correctly.

A) 70 The analysis engine has been updated with the latest Columbian seismic loading requirements as per NSR-10

A) 71 The ANSI N690-1994 code has been updated to correct angle section designs when using clause Q1.6-3 to ensure the correct combined stress is accounted for.

A) 72 The Missing Mass option has been extended to include GROUND MOTION time history loading conditions.

A) 73 The steel design module EN1993-1-1 has been updated to ensure that the name of the National Annex, if used using the NA parameter is reported in the output file.

A) 74 A new SET option has been added to define the test for warping of plates, SET PLATE FLATNESS TOLERANCE xxxx where xxxx is the cosine of the angle and .8666 is the default.

A) 75 The elastic section property reported as SZ for user defined wide flange sections where the top and bottom flanges are defined with different dimensions has been corrected.

A) 76 The standard engine buckling analysis solver has been updated to ensure that if a load case fails to converge to the given tolerance with the defined restraints, thena more prominent message is given as a warning in the analysis window and output file.

A) 77 The basic buckling analysis solver has been enhanced to ensure that if during an analysis, should the 'Abort' button be pressed, the analysis is terminated.

A) 78 The analysis engine has been updated in the method used to report the stresses for channel sections taken from the standard tables. Previously the stresses were based on inertias calculated from the section dimensions which may be different from the published values. Now the stresss are reported based on the inertias published in the database.

A) 79 The design of class 4 sections to the Canadian steel code S16-01 has been updated to correct the compression capacity calculation to ensure that it uses the effective rather than gross section properties.

A) 80 The IS 800-2007 LSD code has been updated to support the design of slender (class 4) wide flange sections.

A) 81 The Canadian steel design module S16-01 has been updated for the design of T sections to ensure that the value of Fe used in the calculation of compression capacity is taken as the smaller of Fex for weak axis buckling and Feyz for lateral torsional buckling. Previously this was taken to be Feyz directly.

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(B) Issues addressed in the Pre-Processing Mode (47)

B) 01 The GUI has been updated to better handle the FIXED END load so that these loads can now be edited in the GUI and if the command line is greater than line length, it is split according to the normal rules. Additionally there was an issue if the base unit and the force unit differed, the values were not getting correctly converted.

B) 02 The Canadian HSS rectangular and round databases have been updated to include details of the A500 sections listed with an HA label.

B) 03 The GUI has been updated to allow Floor Diaphragms to be specified which previously could only be done in the Editor.

B) 04 The GUI has been updated to ensure that the command structure for a steady state harmonic analysis is maintained. Previously, the required line HARMONIC FORCE was being removed causing the analysis to report an error.

B) 05 The GUI has been updated to handle STAAD.Pro models which include multiple "ELEMENT INCIDENCES SOLID" blocks of data.

B) 06 The GUI has been updated such that it can recognise the BEAM parameter settings of 0,1 or 2 for the API code.

B) 07 The seismic definition dialog has been slightly modified to ensure the title 'Load Case' is displayed in the Reference Load panel.

B) 08 The GUI has been updated to display a rendered 3D view of general sections defined using profile points which are referenced from a user table. Note however, that if a new section is added to a user table, then the STAAD.Pro model should be closed and re-opened in order that it be displayed in the rendered 3D view.

B) 09 The GUI has been updated to correct the 3D display of angles that have been specified with an RA specification, i.e. so that the local Z axis is the strong principal axis.

B) 10 The CIS/2 export module has been updated to better handle sections defined in the Australian cold formed database.

B) 11 The GUI has been updated to ensure that Korean PIP sections report their diameter in the member query dialog.

B) 12 The GUI has been updated to display the name of a Canadian W section which has been cut into a T section using the form:- 'W(a)x(b)' to become 'W(a/2)X(b/2)'. This matches the behaviour of cutting US W sections to form T sections. Note that this is also the name used when exporting sections into an ISM repository and when reading back form ISM will reverse the process and create a standard wide flange shape with the T specification.

B) 13 The New Project note for FLOOR structures has been simplified.

B) 14 The GUI has been updated to better handle material definitions that are displayed in the Materials dialog to ensure that the selected type (used with the RAM Connection module) is correctly displayed and saved if modified. An additional macro has been added to the GUI and available from the User Tools toolbar which allows materials defined in an XML file to be added to the model.

B) 15 The Connection Tag check display has been updated to ensure that the label of the units is consistent with the model.

B) 16 The GUI has been updated to re-display the menu to allow user tools to be edited.

B) 17 The analysis engine has been updated to ensure that if a plate has been set to IGNORE STIFFNESS and a self weight command used which includes the plate in the list , then the weight of that plate is not included. Note if the command SELFWEIGHT command has been used without an explicit list, then the plate would not have been included, thus both methods will now yield the same result.

B) 18 The GUI has been updated to parse a model that uses the IMR parameter (Individual Modal Response) with a spectrum command. This defines additional load cases which can be later included in a combination. Previously, if the GUI opened such a file, as the IMR load cases did not exist, any combination that referenced them would be identified as errors and removed if the file re-saved. Now, the integrity of these combinations are maintained.

B) 19 The analysis engine has been updated to support SET NONOTE to hide the NOTES otherwise reported in the output file.

B) 20 The Pdelta analysis has been updated to address an issue if the end node of a member had an axial release but the start end did not, then STAAD treated it as if there were no release when calculating the PDELTA forces during each iteration. Reverse the member produced the correct results.

B) 21 The GUI has been updated to better handle incompletely defined parametric model definitions. These are automatically created in the GUI, but if modified outside by say editing in Notepad, can result in an incomplete definition which previously would cause STAAD.Pro to crash when loading the data file.

B) 22 The GUI has been updated to display hydrostatic plate loads which have been defined in a reference load case. If the load had been defined in a primary load case, then these were displayed correctly.

B) 23 The routine for merging multiple members into a single member has been updated to ensure that if a beta specification has been applied to the maintained member, then that assigned beta angle is retained for the new combined member.

B) 24 The internal processing of the DELETE command when defined on multiple lines which previously caused the GUI to crash.

B) 25 The GUI has been updated to correctly read a steady state definition which includes the command PRINT HARMONIC DISP ALL which was previously reported as an error.

B) 26 The GUI has been updated to ensure that if a member is deleted that has a temperature load assigned, then the load command is updated to remove that member from its assignment list. Previously this would not be done and thus be reported as an error during analysis.

B) 27 The method used for splitting a tapered member has been improved in the GUI to ensure that the dimensions at the insertion point are proportional to the position of any insertion point.

B) 28 The IS 800-2007 LSD steel design module in the GUI has been updated to ensure that it correctly handles all the options for the cantilever parameter CAN.

B) 29 The sequence of profiles in the W shape table of the AISC standard sections has been revised to sequence sections of the same serial size by their weight.

B) 30 The GUI creation of spring supports has been updated to ensure that when the base units are metric, the values used in the user report are consistent with the values entered in the GUI.

B) 31 The GUI has been updated to handle a command MEMBER TENSION 0 whose purpose is to deactivate any TENSION commands that have been assigned to members in previous load cases.

B) 32 The GUI has been updated to handle an incorrectly defined DAMP command in a CONSTANT block (note this is not when defined as part of an explicit material definition). This is an error as it should be defined as CDAMP and as such any subsequent constant definitions such as BETA would be ignored. Now these commands are processed.

B) 33 The steel design module ASD has been updated to correct the K factor calculation routine for members which have a beta assigned.

B) 34 Wind loads on open structures defined using a member list are now displayed in the GUI. Note however, the definition of the member list is currently only available through the Editor, not the GUI.

B) 35 When assigning a thickness specification to a collection of plates, if the list of plates exceeded 400, then this would be added to the input file as multiple specifications. Now that limit has been enhanced to 4000 plates per specification.

B) 36 The GUI has been updated to ensure that if included in the STD file, when opened the seismic accidental load parameters ACC and DEC are correctly displayed and saved.

B) 37 The Steel Joist Institute has published Virtual Joist Girder tables which have been included as a User Table to assist engineers wishing to model steel joists in their STAAD models. The UPT is located in the \STAAD\Sections folder with the properties defined as GENERAL sections. More details on designing with these sections should be obtained from the SJI at www.steeljoist.org

B) 38 The Brazilian steel database has been updated. New CS, CV and CVS tables added. Additional wide flange S Shape table added. A new Pipe table added. Additional sections added to the angle and channel tables. WH sections renamed to W section in W_H table.

B) 39 The Japanese steel database H shape table has been updated to correct the AX of sections as published by JIS.

B) 40 The Jindal steel database has been updated such that T sections can be defined from sections taken from wide flange section shapes.

B) 41 The P-Delta analysis sheet of the Analysis/Print Commands dialog box has been slightly modified so that it is in line with the default command structure.

B) 42 The ASCE 07 2010 wind loading tool has been updated to remove the reference to the importance factor which is not required in the 2010 version of the code.

B) 43 The dialog 'View>View Management>Add to View' has been updated to ensure that any saved views are named allowing the selected items to be added to the selected view.

B) 44 The GUI tool that can be used to merge members has been updated to ensure that if a material has been assigned to the segmental parts, the material is maintained and assigned on the new combined member.

B) 45 The GUI tool that can be used to merge members has been updated to ensure that if the various parts of the merged member have had selfweight assigned to them, then selfweight is assigned to the new combined member.

B) 46 The display of angle profiles has been updated to improve the orientation of 3D rendering when the file is defined as Z UP with both ST and RA specifications.

B) 47 The US steel database has been updated to correct a few HSS definitions and 5 number 3-1/2 x 2-1/2 rectangle sections have been added.

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(C) Issued Addressed in the Post-Processing Mode (12)

C) 01 The member query dialog and unity check tables have been updated to ensure that when a design is performed to the AISC 360-10 code where the design includes both strength and deflection checks, these items display the governing condition from both design requirements. Previously only the strength checks were included.

C) 02 The post processing display of stresses on user defined wide flange sections where the two flanges have been assigned different dimensions has been updated to correctly display the stresses on these sections.

C) 03 The Member Query dialog box includes a message to warn that it cannot accurately display graphs of combinations that include SRSS components or references to other combinations that themselves are SRSS results.

C) 04 The Geometry menu of the GUI has been updated to include the 5 different forms of adding solid members graphically to the model.

C) 05 The post processing routine to display a result line through a set of plates has been enhanced to handle results of load cases which include thermal loading.

C) 06 The GUI has been updated to improve the display and reporting of intermediate member displacements when the inertia of the section is very small.

C) 07 The member query routine for members which includes loads from an AREA command has been updated to ensure the correct loading is accounted for in evaluating the intermediate forces.

C) 08 The plate query has been updated to ensure that the values of principal stresses-Centre Stresses are correct and consistent with the values reported in the tables.

C) 09 The AISC N690-1994 design code has been updated to ensure that when the results are displayed in the member query dialog and unity check table in the post processing mode, they report the critical clause if it is due to combined shear and torsion. Whilst this is correctly being accounted for in the design and output file, the post processing did not include this.

C) 10 The display of buckling mode shapes in the post processing mode has been updated to ensure that the the mode shape displayed is always set to 1 when first displaying the mode shape.

C) 11 The member query dialog has been updated to ennsure that if a member is defined as a cable, then due to its non linear behaviour, intermediate results are not displayed as was done previously for deflection results, following the same procedure when querying truss or inactive members.

C) 12 The member query dialog box has been updated to display the results for a design to AISC 360-05 in Kip and Inches for an English base unit system and KN and Metres for a metric base unit system. Previously some values were too large to be effectively displayed in the dialog.

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(D) Issues Addressed in the Steel Design Mode (00)

(None)

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(E) Issues Addressed in the Concrete Design Mode (11)

E) 01 The Concrete Mode has been updated by removing the old DD version of Eurocode 2 to prevent confusion with the current EN1992-1-1 version.

E) 02 The EN1992-1:2004 design of columns in the Concrete Design module has improved the calculation of the design moment for slender columns. Whilst the design standard is not specific, common sense suggests that the design moment should never be less than the first order moment. Previously a second order moment added to a moment calculated from the first order end moments, as per the code. Now, this calculated moment is additionally checked against the first order moment and the maximum is used.

E) 03 The Russian concrete design SP 52-101 has been updated to ensure that if a design requires a minimum of 2 bars of a size bigger than in the design brief, then the program reports this a failure. Previously this would cause the design to crash.

E) 04 The RC Designer mode has been updated for axial capacity of columns in ACI 318-05 designs. During calculation of the axial capacity of a column, with biaxial moments, the smaller axial ratio calculated when assessing the two axes independently is taken. However in the case where the moment in one axis is very small, the axial ratio is not actually calculated. The capacity in that direction is now set to a very large value, so that the final ratio is actually the smaller (calculated) one.

E) 05 The Eurocode EN1992-1-1 module in RC Designer has been enhanced with a new National Annex to set the design requirements as per the Malaysian NA.

E) 06 The AIJ concrete design module has been removed from the RC Designer mode.

E) 07 The RC Designer mode has been updated to include a new unit option for setting the unit for slab areas. This has been added to the View>Options>Structure Units

E) 08 The BS8110 concrete column design routine has been improved. Previously in the case where the neutral axis of a column lay outside the depth, the moment due to the concrete compression block was being incorrectly set as zero. This was very conservative, but only affected columns with heavy axial load but small moment.

E) 09 The RC Designer report printing routine has been modified to prevent a crash which occasionally occurred when including shear details.

E) 10 The Eurocode EN1992-1-1 module in RC Designer has been enhanced with a new National Annex to set the design requirements as per the Singaporean NA.

E) 11 The Concrete Design Mode has been improved to handle models with steel physical members defined in the STAAD.Pro file. Previously the members created when the file is reopened in the Concrete mode, the existance of steel physical members would cause concrete members to dissappear from the design list..

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(F) Issues Addressed in the RAM Connection Mode (05)

F) 01 The RAM Connection module in STAAD.Pro has been updated to version v8.0.1 which includes the following new templates:-

i. US - MEP Knee BCF.con

ii. US - Moment End Plate BCF.con

iii. US - Moment End Plate BCW.con

iv. US - Moment End Plate BS Apex.con

v. US - Moment End Plate BS.con

vi. UK - Bolted End Plate BS Apex.con

2. The following templates are no longer supported:-

i. US - Extended End Plate BCF.con

ii. US - Extended End Plate BCW.con

3. The following sections are now supported:-

i. Canadian W Shape

ii. Canadian M Shape

iii. Canadian S Shape

iv. Canadian HP Shape

v. Canadian Angle

vi. Canadian Channel

vii. Canadian MC Channel

viii. Canadian HSS Round

ix. Brazilian I Shape

x. Brazilian Angle

xi. Brazilian Channel

4. Minor enhancement and bug fixes. Note that it does not support tapered members and Haunched Beam and the connection details are not synced with structural synchronizer ISM ( 3.0 ) "

F) 02 The RAM Connection module has been improved to determine the angle at which members combine when forming a gusset connection.

F) 03 The RAM Connection designs have been updated to ensure that if the sections in the connection include the value of K in the database, then that value is used, if not (such as for UPT sections), then K is determined from the section dimensions.

F) 04 The Ram Connection Mode has been updated to ensure that when pipe sections are used in a gusset connection they are displayed correctly.

F)05 The Ram Connection template file 'Moment End Plate BCF.con' has been updated to correct a reference which caused the application to crash when the template was used.

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(G) Issues Addressed in the Advanced Slab Design Mode (00)

(None)

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(H) Issues Addressed in the Piping Mode (00)

(None)

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(I) Issues Addressed in the Editor, Viewer and other modules (13)

I) 01 The STAAD.BeEAVA module has been updated to ensure that the heaviest axle can be located as close as possible to the point of interest.

I) 02 The STAAD.Beava bridge deck module has been enhanced to ensure that when a roadway is made up of multiple lanes, the required edge distances are processed for all lanes. Previously, only the lanes at the outsides were being processed correctly any middle lanes (i.e. when there are 3 or more lanes) would not be processed correctly if the distance from the kerb was different to the distance between lanes.

I) 03 The influence surface routine in the Bridge Deck mode has been improved when using the basic solver which was previously not accounting for the bandwidth reduction when processing loaded nodes, thus was not able to display the influence surface.

I) 04 The Bridge Deck mode AASHTO LRFD has been updated to ensure that when a vehicle is located at the edge of a lane it is positioned so that the wheel line is at the side of the lane less the kerb width. Previously the axle was being located at this position.

I) 05 The influence surface generator has been updated to provide assistance for very large models that require more virtual memory than is currently available. If the analysis requires more memory than is available, then this is reported in the output file. Previously this would cause an error and the output file that was being created would be deleted. Now that is being retained and can be reviewed for information on the influence surface analysis process.

I) 06 The effects reported in the STAAD.Beava module have been improved due to an error in unit conversion, however, note that the loads created for a given effect were correct.

I) 07 The STAAD.Pro ISM Module (previously branded as StucLink) has been updated to improve installing and operating on non-English Windows operating systems.

I) 08 The STAAD.Beava module has been improved to handle files which include parametric model sections in the input file.

I) 09 The CIS/2 import routine has been updated to improve the mapping of European angle profiles. Initially these would display as channels, but would display correctly again once the file was closed and reopened.

I) 10 The ISM integration module has been improved to ensure any partial fixity releases (as opposed to full or spring releases) are maintained when a STAAD model is updated from an ISM repository. Refer to the StrucLink ReadMe documentation in the folder \STAAD\Plugins\StrucLink\ReadMe\ which contains full details of a number of other significant update on the ISM interation module.

I ) 11 A beta service has been added to the File menu to allow models to be analysed on a remote server as a job for a scenario as part of a project and the results compared using a scenario manager.

I) 12 A new option has been added to the Configuration>News Channels, to allow the news feed displayed on the Start Page to be turned off. This may assist some users who operate behind a proxy server and would thus fail to successfully get access to the news feed.

I) 13 The CIS/2 import module has been enhanced to handle node names that are defined from a combination of numeric and alphanumeric characters. Also if the CIS/2 file has members defined with the same description which was being used by STAAD.Pro as the member number, then STAAD.Pro will generate a new number for those members. Additionally un mapped wide flange and channel sections are imported into STAAD.Pro as UPT sections. Any members that fail to have any property asssigned will be grouped by the property name given. Finally any CIS name that uses a '*' character will be replaced by an 'x' as * is a reserved character in STAAD.Pro.

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(J) Issues Addressed in OpenSTAAD (02)

J) 01 The OpenSTAAD API function that can be used to create spring support definitions has been updated to handle incomplete support definitions which previously would have caused a crash.

J) 02 The OpenSTAAD function GetBeamSectionName has been updated to ensure that if a section is defined as a double profile, then the D parameter is returned in the section name.

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(K) Issues Addressed with Documentation and Printing (09)

K) 01 The AISC 360-10 steel design module has been enhanced to allow a detailed output in a user report

K) 02 The user report items 'Beam Maximum Axial Forces', 'Beam Maximum Shear Forces' and 'Beam Maximum Moments' tables have been updated to ensure the Max +ve and Max -ve values are displayed in the correct columns.

K) 03 The details of a response spectrum included in a user report have been corrected to show the parameters correctly.

K) 04 Section 5.32.4.3 of the Technical Reference manual has been updated to remove the description of a limitation that is no longer applicable and should have been removed earlier.

K) 05 The Technical Reference manual for steel design to the AISC 360-05 has been updated to confirm that for the design of a single angle for flexure, the parameter “LX” should be used to specify the value of the term “L” in equations F10-4a, F10-4b, F10-5 and F10-6 of AISC 360-05.

K) 06 Table 1-2 of the Technical Reference manual has been updated to better illustrate the orientation of angle profiles when the SET Z UP command has been specified.

K) 07 FLX parameter added to Table 1.3.4 of the Technical Reference manual

K) 08 The notes of section 2.3.4 of the Technical Reference manual have been revised.

K) 09 The documentation for the ASME NF 3000 - 2001 and 2004 codes has been updated to include details on 3 parameters, CAN, PROFILE and TMAIN which were available in the GUI (also documented in the other versions of the code)

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(L) Issues Addressed with licensing / security / installation (02)

L) 01 The licesning of STAAD.Pro has been brought into line with other Bentley applications in that instead of a forced checkout of a STAAD license, usage is logged.

L) 02 European regional design codes and Eurocode have been collated into new Super Code licenses.

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Tags: STAAD.Pro

STAAD.Pro V8i SS5, Build 20.07.10.66 (14 January 2015)

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Current Revision posted to RAM | STAAD Wiki by Carlos Aguera on 3/8/2018 1:16:56 PM

What's New in STAAD.Pro V8i SS5, Build 20.07.10.66 ( 14 Jan 2015)Issues addressed in:-

  • (A) The Analysis/Design engine (00)
  • (B) The Pre-Processing Mode (00)
  • (C) The Post-Processing Mode (00)
  • (D) The Steel Design Mode (00)
  • (E) The Concrete Design Mode (00)
  • (F) The RAM Connection Mode (00)
  • (G) The Advanced Slab Design Mode (00)
  • (H) The Piping Mode (00)
  • (I) The Editor, Viewer and other modules (00)
  • (J) OpenSTAAD (00)
  • (K) Documentation and Printing (00)
  • (L) licensing / security / installation (01)

(L) Issues Addressed with licensing / security / installation (01)

L01) The licensing module has been updated to ensure the actual usage of the application is correctly reported.

STAAD.Pro V8i SS4 Build 20.07.09.31 ( 11 March 2013)

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Current Revision posted to RAM | STAAD Wiki by Carlos Aguera on 3/8/2018 1:16:56 PM

What's New in STAAD.Pro V8i SS4 Build 20.07.09.31 ( 11 March 2013)

  • (A) Issues addressed in the Analysis/Design engine (31)
  • (B) Issues addressed in the Pre-Processing Mode (10)
  • (C) Issued Addressed in the Post-Processing Mode (01)
  • (D) Issues Addressed in the Steel Design Mode (00)
  • (E) Issues Addressed in the Concrete Design Mode (00)
  • (F) Issues Addressed in the RAM Connection Mode (00)
  • (G) Issues Addressed in the Advanced Slab Design Mode (00)
  • (H) Issues Addressed in the Piping Mode (01)
  • (I) Issues Addressed in the Editor, Viewer and other modules (08)
  • (J) Issues Addressed in OpenSTAAD (00)
  • (K) Issues Addressed with Printing and Documentation (08)
  • (L) Issues Addressed with licensing / security / installation (00)

(A) Issues addressed in the Analysis/Design engine (31)

A) 01 The STAAD.Pro analysis routines that read external UPT files has been updated to check for files that have been encoded with UNICODE. These are not supported, but now if detected, will warn the user and advise that the file be saved in a ANSI format.

A) 02 The routine that adds the key file information to the output file when set in the Configurations>Input/Output File Format' dialog, has been updated to check the option has been set from the settings stored in the user virtual store.

A) 03 The AISC 360-10 design code has been updated to set the slenderness limit to the limit for tension (default 300) if the member has no axial load. Previously, this was taken as the limit for compression (default 200).

A) 04 The shear capacity of tapered wide flange sections has been improved for AISC 360-05 designs. When calculating of Cv, the depth of the section was being taken as that at the start of the member for all cross sections. This has been changed to use the depth of the section at the current location.

A) 05 The AIJ seismic routine has been updated to correct a fault introduced in the initial SS4 release where loads at intermediate levels are not getting generated.

A) 06 The format of output from an AISC 360-10 design has been updated to improve the pagination in the ANL file.

A) 07 The details of an AISC-10 design have been updated to ensure that the values of MNY and MNZ are displayed in a member query dialog.

A) 08 The AIJ 2005 steel design module has been updated to include a parameter PLB (the plastic critical slenderness ratio, p-lambda-b), which is used to calculate the equivalent bending moment based on the member end moments. If this is 0 (the default value), it will be calculated according to AIJ 2005 eqn. 5.12 or 5.14. Any other entered value will be used as the value of p-lambda-b.

A) 09 The AIJ 2005 steel design module has been updated to ensure that the calculations of the allowable bending stress are limited by the allowable tensile stress.

A) 10 The IS-1893(2002) response spectrum routine has corrected the calculation of base shear from the static method due to an earlier error in obtaining the multiplication factor corresponding to the damping ratio from table 3 of the IS code. This had led to an abnormally high overall multiplication factor.

A) 11 The Australian steel design module to AS-4100-1998 has been updated to ensure that when a CHS section is designed, the value of yield slenderness limit is taken as a Circular Hollow Section i.e. 82, not treated as a flat section which was resulting in a lower limit.

A) 12 The IS-456 concrete design module has been modified to ensure that if the MAXMAIN parameter is set to a value which requires more than a single layer of tensile reinforcement, then if a rebar pattern can be found, it will be reported. Previously the design would report that a suitable bar arrangement could not be found.

A) 13 The EN-1993-1-1 steel design module has been updated to improve the handeling of sections designed as angles when they are double symmetric and this the angle between geometric and principal axes is zero. Previously this would cause the member to have a ratio of zero.

A) 14 The output format for the torsion values in the Member End Forces results table has been updated to match the format of the moments.

A) 15 The NS-3472 Norwegian steel design has been updated to add a warning is tapered tubes are designed as these are outside the scope of this design module.

A) 16 The EN-1993-1-1 design routines have been enhanced for General Sections designed as a given section by the GST parameter. The design will now use the warping constant defined by the HSS parameter rather than calculating it from the dimensions given. If HSS is not given or zero, then the warping constant will be calculated assuming the section type given by GST and the given section dimensions.

A) 17 The EN-1993-1-1 steel design module has been enhanced when calculating the reduced moment resistance of sections in the presence of bending and shear. The value calculated now considers the effect of torsion if present and the reduction factor rho calculated from 6.2.8(4) using the plastic shear resistance as defined in section 6.2.7(9)

A) 20 The calculation of intermediate displacements for members with offsets has been enhanced by better accounting for any initial rotation at the node point which gets transposed to the effective start of the member and the section displacements reported in the output fie are from the effective start of the member rather than the node point. Note that the actual nodal displacements are unaffected by the change.

A) 21 The Eurocode steel design module EN-1993-1-1 has been enhanced to improve the efficieny of designs of wide flange sections that are subject to bending and high shear forces. When the applied shear force > 50% of the shear capacity, the yield stress is reduced as per clause 6.2.8 of the code. This reduced yield stress is now only applied to the shear area and the full fy will be applied to the rest of the section area. The moment capacity of the section will then be calculated as an effective combined section of two parts using the different yield stresses on the different areas of the section.

A) 22 The Eurocode steel design module EN-1993-1-1 has been updated to improve the design of user defined channel sections. The calculation of the c of g along the local z-z axis was not correct which resulted in an incorrect value of torsional buckling (Ncr,T) and torsional flexural buckling (Ncr,TF).

A) 23 The Eurocode steel design module EN-1993-1-1 has been updated to improve the shear buckling checks where the flange capacity exceeds the applied shear load. Previously this would cause the design to enter a never ending loop and thus cause the design to hang.

A) 24 The Mexican seismic load modules have been updated to ensure that the calculation of the base shear is correct for instances when Te>Tb. Previously, the value calculated was over estimated.

A) 25 The STAAD.Pro analysis routines that evaluate the distribution of area loading defined by group or defined with inclined areas using the ONEWAY or FLOOR definition have been improved as previously the calculation that determined the plane of the loaded area could be adversely affected by its distance from the model origin and in some instances would fail to capture all the nodes in the plane. Note however, that this would be indicated in the GUI as the display would show areas that were not captured by the load.

A) 26 The calculation of the Centre of Rigidity using PRINT DIAPHRAGM CR has been improved.

A) 27 The Indian concrete design module IS456 has been updated to catch situations where narrow beams are set to use large bar sizes equal to the actual distance of the beam width less the side cover. Previously this extreme situation would cause the design to fail.

A) 28 The AISC 360-10 and AISC 360-05 steel design modules has been enhanced with two new parameters 'CSP', spacing between connectors (default 12in) and 'SNU', type of connectors (default, snug bolted) to define for the construction of built up members as defined in section E6.

A) 29 The Indian concrete design module IS:13920 has been updated to clarify the use of the COMBINE parameter such that when it is used to create a continuous member to design, the command DESIGN BEAM should follow before another set of members are COMBINED into another continuous member and that followed by the DESIGN BEAM command. If this sequence is not followed, the design will report this as an error.

A) 30 The cable analysis routine has been updated to correct a convergence issue that resulted in out of balance results even after convergance. However, note that moments due to applied loads assume original coordinates while reactions are determmined by the deformed coordinates, thus the deformed balances will differ to a degree from the applied balances.

A) 31 The compression capacity calculation for rectangular hollow sections in the AS:4100-1998 steel design module has been updated. The yield slenderness limit (table 6.2.4) for the elements of the section considered as the flange were being calculated as elements supported on one edge. It has been updated to use the limit for elements supported along both edges

(B) Issues addressed in the Pre-Processing Mode (10)

B) 01 The GUI has been updated to address an application crash when files are opened from the Recent Files list.

B) 02 The range of standard steel databases provided by STAAD.Pro has been enhanced with an additional Brazilian steel database containing sections rolled by Geradu and V&M tubular sections.

B) 03 The default value set for damping in the GUI for the IS-1893 2002/2005 seismic load generator module has been updated to 0.05 (to represent 5%) rather than the previous value of 5 (which represented 500%)

B) 04 The description of the meanings of the CB parameter for BS5950-200 has been clarified in the GUI

B) 05 The GUI has been updated to ensure that the parameter RATIO is correctly handled for the Australian concrete design code AS-3600.

B) 06 The GUI has been updated to handle wind load defintions for open structures on models where not all the section properties have been assigned, thus displaying loading does not make sence. Note that this would not affect the analysis as all the section properties are required on all members for an analysis to be performed.

B) 07 The GUI has been slightly modified to correctly show a 3D section of channels when a SET Z UP command is used.

B) 08 The GUI has been updated to correctly display the factor used in a REPEAT LOAD.

B) 09 The GUI has been updated to address an occasional memory de-allocation issue which if encountered when re-loading a model into an open instance of STAAD.Pro such as after making changes in the Editor, would cause the program to crash. There was no impact on the data, just the GUI would need to be restarted.

B) 10 The plastic modulii of some S shape sections have been updated in the Indian steel section database.

(C) Issued Addressed in the Post-Processing Mode (01)

C) 01 The analysis has been enhanced with a new classification of informative message item, 'Notes'. These are added to the output for assistance or clarification. At the end of the analysis, the number of 'Errors' and 'Warnings' and now 'Notes' are reported as a quick summary. These Notes are bookmarked in a similar way as the error and warning messages for quick reference in the Output Viewer.

(None)

(D) Issues Addressed in the Steel Design Mode (00)

(None)

(E) Issues Addressed in the Concrete Design Mode (00)

(None)

(F) Issues Addressed in the RAM Connection Mode (00)

(None)

(G) Issues Addressed in the Advanced Slab Design Mode (00)

(None)

(H) Issues Addressed in the Piping Mode (01)

H) 01 The Piping Supports Table in the Piping Mode had been updated to allow the data to be copied onto the clipboard and can be pasted directly into a third party environment such as Notepad or MS Excel.

(I) Issues Addressed in the Editor, Viewer and other modules (08)

I) 01 The ISM integration has been enhanced with the support of cold formed C and Z purlins. During an export, if these sections are not mapped to given profiles, then they will be mapped to prismatic sections.

I) 02 The ISM integration has improved the orientation of angle sections that have been imported.

I) 03 The ISM import of generic round pipes such as those created by SACS, has been improved.

I) 04 The ISM integration has improved the handeling of models defined with Z-UP

I) 05 The ISM import has been updated to ensure that Japanese wide flange sections can be mapped during integration.

I) 06 The AASHTO LRFD loading module in the Bridge Deck mode has been updated to ensure that any Multiple Presence Factor settings for the number of transverse lanes is correctly utilised.

I) 07 The ISM module has been updated to ensure that when an ISM model is updated from STAAD.Pro, the nodal connectivity created during the initial import is recorded in the repository to maintain connectivity for future updates.

I) 08 The ISM module has been enhanced to make use of the recorded location of the ISM file when updating from or to the repository.

(J) Issues Addressed in OpenSTAAD (00)

(None)

(K) Issues Addressed with Printing (08)

K) 01 The IS-456 concrete design parameters has been updated with the currently available set of supported TRACK options.

K) 02 The Japanese steel design verification for AIJ 2005 has been revised to show consistent data.

K) 03 Details of the Advanced Mesher utility application have been added to the main STAAD help system.

K) 04 Section 5.32.3.4 Surface Loads Specification of the Technical Reference Manual has been updated to include a fuller description of the various forms of loading available for surface objects.

K) 05 The User report 'Steel Design' output item for Eurocode 3 designs has been enhanced to show more details of a TRACK 2 output. Note however, that the equivalent TRACK 2 output item ANL report may contain even more information regarding some of the additional checks that have been performed.

K) 06 Section 5.33.10.1 of the Technical Reference Manual, Response Spectrum Specification - Generic Method has been updated to remove a set of parmeters to generate individual reponse cases that are not supported by the engine (or GUI). Note that modal reponse cases can be included using the IMR parameter as outlined in the topic.

K) 07 Section 2.3.1 File menu of the User Interface manual has been updated to better outline the scope of DXF import capabilities

K) 08 The online help has been updated with the documentation for the IS1893-part 4 options

(L) Issues Addressed with licensing / security / installation (00)

(None)

What's New in STAAD.Pro V8i SS6, Build 20.07.11.82 ( 12 July 2016)

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Current Revision posted to RAM | STAAD Wiki by Carlos Aguera on 3/8/2018 1:16:56 PM

What's New in STAAD.Pro V8i SS6, Build 20.07.11.82 ( 12 July 2016)

Issues addressed in:-

  • (A) The Analysis/Design engine (48)
  • (B) The Pre-Processing Mode (13)
  • (C) The Post-Processing Mode (02)
  • (D) The Steel Design Mode (00)
  • (E) The Concrete Design Mode (00)
  • (F) The RAM Connection Mode (31)
  • (G) The Advanced Slab Design Mode (00)
  • (H) The Piping Mode (00)
  • (I) The Editor, Viewer and other modules (01)
  • (J) OpenSTAAD (01)
  • (K) Documentation and Printing (03)
  • (L) licensing / security / installation (02)

(A) Issues addressed in the Analysis/Design engine (48)

A) 01 The AISC 360-10 design check has been updated to correct the flexural torsional buckling stress, Fcr, that is calculated for double angle profiles when Iyy<izz. this is due to a recent modification that failed to check for the occation when iyy>Izz and thus the major and minor axes were not correctly identified.

A) 02 The design routine for IS:800-2007 has been updated to include a warning in the output file if a MEMBER SELECTION command is included, but is not followed by a suitable analysis command to update the forces based on the new section profiles.

A) 03 The design routine for CSA S16-14 has been updated to include a warning in the output file if a MEMBER SELECTION command is included, but is not followed by a suitable analysis command to update the forces based on the new section profiles.

A) 04 The design routine for AISC 360 has been updated to include a warning in the output file if a MEMBER SELECTION command is included, but is not followed by a suitable analysis command to update the forces based on the new section profiles.

A) 05 Clause 8.6.1 of IS:800-2007 has been added to check that the minimum web dimension is met and a warning is displayed if d/tw less than the value specified.

A) 06 The AISC 360 design routines have been updated to ensure that profiles defined as solid rods are excluded from the code checks

A) 07 The calculation for clause 9.3.1.2(b) in IS:800-2007 has been updated for welded profiles. As this is not 100% clear in the code, the following method has been adopted, if n>=a then Mndy = minimum of ( Mdy[1-{(n-a)/(1-a)}^2] and Mndy ). Previously if the axial load was zero, this would have resulted in Mndy as 0 and reported as infinity in the output.

A) 08 The AISC 360-10 routines for designing tubular sections taken from a standard table have been updated to use the following for the shear area:- Ayy = (D-3t)*t and Azz = (B-3t)*t. Note that this was correctly defined for tubular sections taken from a user table.

A) 09 The stresses reported for solid entities (both corner and centre stresses) have been corrected from a fix for addressing stresses for response spectrum cases which has resulted in the incorrect value of Poissons ratio was being used.

A) 10 The imperfection analysis routines have been updated to include both the moment and shear effects of the camber defined on members. However, whilst the moments were being considered, the shear was not. This has been corrected.

A) 11 The Russian steel design codes SNiP and SP16 have been updated to ensure that only the following profiles can be designed, wide flange, single channel, circular and rectangular hollow sections, tee, single and double channels. Any other profile is currently not supported. A warning message is now displayed when attempting to design one of these profiles.

A) 12 The deflection check routine used in AISC 360, IS:800-2007 and CSA S16 has been updated to correct a failure resulting in the CAN parameter not being checked (i.e. for cantilever members). Additionally, in the check for AISC 360 when the critical condition is deflection, then the forces were not being extracted and being displayed as 0.0.

A) 13 The routine to determine wind loads on open structures has been updated to correct the loading calculated on members that are not parallel to the direction in which the wind is being applied.

A) 14 The AISC 360 design routines have been updated to support the design of double channels which are aligned front to front, i.e. with the flanges of the channels pointing towards each other and touching. These sections are treated as a box section.

A) 15 The AISC 360 design routine has been updated to correct a spurious message that was being reported if the model included an ENVELOPE TYPE STRENGTH, but there is no DFF parameter. The message reported that the deflection check would not be performed as the DFF parameter had not been defined, even though no deflection check was requested.

A) 16 The IBC 2012 routine to determine the S1 and SS values has been updated to ensure that the correct values are determined when extrapolating between published values.

A) 17 The DIRECT ANALYSIS routine has been updated to support multiple response spectrum cases.

A) 18 The deflection check routines in the AISC 360, IS:800-2007 and CSA S16 design codes have been updated to report the correct load case. Previously the report would indicate the case to be the last case in the list rather than the critical case, however, the value was correct.

A) 19 The default value for the proximity of duplicate nodes created with the MESH command has been reduced from 0.1 in to 0.03937 into match the default tolerance in the GUI. Additionally, if the value has been changed using the SET MESH TOLERANCE and this does not match the value in the UI, then a warning message will be displayed.

A) 20 The Russian steel design codes now correctly design HSS sections as circular or rectangular hollow sections. Previously these were being designed as wide flange sections.

A) 21 The Japanese steel design codes AIJ 2002 and 2005 have been updated to remove a modification added in STAAD.Pro V8i SS5 (20.07.11.41) to address equation 6.4

A) 22 The analysis engine has been updated to address an issue where a primary load case includes self-weight and that load case is later referenced in a second case using a REPEAT command, then the effect of the self weight on the section axial forces was not being included.

A) 23 The IS:13920 concrete column design has been updated to calculate the space between two parallel legs of rectangular hoop acting as confining reinforcement. Previously this led to the failure of providing confining reinforcement. Now, the program calculates the space between two parallel legs of rectangular hoop acting as confining reinforcement so that it does not exceed 300 mm. If it exceeds 300 mm it introduces cross ties and additional longitudinal reinforcement (if required).

A) 24 The sign of the shear force reported in the output file for designs to IS:800-2007 have been updated to be consistent with the signs reported elsewhere in the program.

A) 25 The output for the Russian SNiP steel design has been updated when displaying the details of clause 5.31, the values of BETA is now formatted so that its value is clearer. The design itself has not changed.

A) 26 The Indian steel design IS:800-2007 has been updated for clause 9.2.2. Now the bending capacity for laterally supported members with high shear (i.e. V>0.6 Vd) will be calculated according to sec.9.2.2(b). Note that if the section is semi-compact, Mdv = Ze * fy / Gamma_0, where Ze = effective elastic section modulus considering the shear buckling case according to sec.8.2.1.1(a).

A) 27 The AISC 360 steel design codes have been updated to ensure that if the parameter STP is specified with a value of 2, i.e. consider the profile as a welded section, then the larger web length is considered (i.e. without the rolling radius).

A) 28 The output for a response spectrum case has been updated to ensure that the details of the modal acceleration is reported correctly.

A) 29 The processing of the Canadian seismic code with SCL 6 (i.e. site class F), has been updated, such that if this is specified, the values of Fa and Fv are used. In fact if Fa and/or Fv are entered, then these are used rather than those determined from the value of the site class.

A) 30 The deflection check routine for the Canadian steel design code CSA S16-14 has been updated to ensure that the results are correctly converted to the metric unit system and this is enforced by including the units which are MM.

A) 31 The details of floor panels that have been loaded with a FLOOR LOAD command are now included in the output file. This makes it easier to verify that the areas being loaded by the engine match those as indicated by the graphics in the GUI.

A) 32 The analysis engine has been updated to address an issue when a primary load case contains a REPEAT LOAD that incudes reference to a load case which itself has a reference to a NOTIONAL LOAD. If the primary case also includes a reference to a NOTIONAL LOAD, processing of this would cause the analysis to crash.

A) 33 The AISC 360 steel design routines have been updated for processing the serviceability checks. If a deflection check is specified by including an envelope of type serviceability, but DFF has not been set, a warning will now be displayed in the output file to indicate the missing parameter.

A) 34 The Indian steel design routine IS:800-2007 has been updated when calculating the member strength to clause 9.3.1.1 when in tension. The value of Td is used in determining Nd when in tension. Note that when in compression, Nd = Ag*fy/Gamma_m0.

A) 35 The Indian concrete design outputs for both IS:456-2000 and IS:13920 have been updated to include a header which includes details of the name of the code used in the design and the method of design followed, e.g. Limit State.

A) 36 The analysis routines have been updated when processing ENVELOPE definitions such that if any load case is included as both a Strength AND a Serviceability envelope, then a warning message. Any load case that is included in both types will be used in the first type that it is defined with.

A) 37 The deflection check performed for the AISC 360 design codes when set to metric units has been updated to ensure the report displays the values in metric units.

A) 38 The steel design code routines for AISC 360, IS:800-2007 and CSA S16 have been updated to catch a situation where a CHECK CODE or SELECT command line includes a member reference multiple times. The second instance of the same member number would cause the program to fail and only partially report the design for the second and subsequent references.

A) 39 The steel design codes AISC 360, IS:800-2007 and CSA S16 have been updated to report errors if the design is set to use PMEMBER references instead of MEMBER. Currently these codes only support the design of analytical members, not physical members.

A) 40 The SABS:0100 concrete design routine has been corrected to address an issue where the moments being used were not being used in the correct sense and resulting in an incorrect area of reinforcement being reported.

A) 41 As per cl. 4.4.2 of IS800:2007, if the moment amplification factor (Ky, Kz calculated as per cl.9.3.2.2) is more than 1.4, a second order elastic analysis is required. This has been added to the IS:800-2007 design routine such that if this is identified then a warning is displayed advising the use of a second order analysis.

A) 42 The IBC 2006 routine has been updated to ensure that Lower Cs limit is greater than that specified in eqn 12.8-5 which previously was not being done.

A) 43 IS:800-2007 LSD and WSD codes have been updated to include a provision to check against flexural-torsional buckling according to clause 7.5.1.2. This check is included for single angle section profiles and the member is axially loaded through one of its legs which thus results in an additional moment due to the eccentricity of the leg from the centroid. Additional parameters for the codes to cover this condition are ANG, FXTY and NBL. Refer to the International Design Codes manual for more details on the default values and correct use of these parameters.

A) 44 The IS:800-2007 design routine has been corrected to address a problem that occurred for the design of a collection of members that referenced multiple user defined PIPE sections. The members that had been assigned with the second or any subsequent defined profile were being designed with the first assigned user defined profile. Note that the details of the section properties that were being used would be reported in the output file. However, this was not a problem if the user pipes were defined in a UPT.

A) 45 The Russian steel design code SP16.13330 has been updated to ensure that when checking clause 8.2.1(44) for combined bending and shear, if the ratio of this check exceeds unity, then the status is shown as a failure. Whilst the ratio would be shown correctly, if this was the only clause to exceed unity, then the overall status would still show as a pass, even though the failure ratio is shown as greater than one.

A) 46 The IS:800-2007 design routines for wide flange sections with slender flanges has been updated. Due to the restrictions in the code for the design of these sections, they will only be designed for axial forces. If there are any moment forces detected, they are now reported as a failure in the design.

A) 47 The IBC 2006 (ASCE 7-2005) seismic loading routine has been updated such that if a used value of CT is entered, then that value is reported as entered (and not modified to the current unit system). Note that this is used in calculating the approximate fundamental period Ta as per eqn 12.8-7 in clause 12.8.2.1 of ASCE 07-2005, which uses the difference between maximum and minimum values of Y ordinate in the model (in feet) to determine 'hn'.

Additionally, if either of the parameters CT or K (which equates to the terms 'Ct' and 'x' in eqn 12.8-7) are not included in the IBC definition, then their values are calculated based on a determination of the Young's Modulus of all the members in the model. The value is calculated as the sum of all the Young's Modulus for all the members in the model divided by the number of members in the model. If this value < 4,000 ksi, then the model is assumed to be 'Concrete moment-resisting frame' and the missing values of 'Ct' and/or 'x' are taken as 0.016 and 0.9 respectively. If this value is > 10,000 ksi, then the model is assumed to be a 'Steel moment-resisting frame' and the missing values of 'Ct' and/or 'x' are taken as 0.028 and 0.8 respectively. If this value is between 4,000 and 10,000 ksi, then the model is assumed to be 'All other structural systems' and the missing values of 'Ct' and 'x' are taken as 0.02 and 0.75 respectively. Note that previously, if the parameter K was not entered, the value of 'x' was simply taken as 0.75.

A) 48 The Indian steel design code has been updated to ensure that if any member is clasified as slender and also has any moment force (other than a wide flange member with a slender web), then this is reported as a FAIL. This is because the code is restricted to only support axially loaded slender members and there is no provision for determining a bending capacity except for wide flange members with slender webs. Previously only the details of the axial checks were reported and as such could be reported as a PASS.

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(B) Issues addressed in the Pre-Processing Mode (13)

B) 01 The display of the parameter LAT for the IS:800-2007 LSD and WSD codes has been updated to clarify that the two options are in reference to clause 8.2.2 and 8.2.1 respectively.

B) 02 The Indian Profiles (legacy) database has been updated to remove an unnecessary table called 'ConversionErrors'

B) 03 An additional check has been included in the tool Geometry>Intersect Selected Members>Highlight such that an intersection point will be included in the members connect at the end of one of the members.

B) 04 The GUI has been updated to recognise the command IGNORE ELEMENT which previously was reporting as an error. However, note that if the file is saved, then the command will be changed to IGNORE MEMBER. Note that both terms are interchangeable even for plates.

B) 05 The processing of COMBINATION commands has been updated to ensure that if the combination refers to non-existent load cases, then when the file is opened, then a warning is displayed with details of the non-existent load cases and when the file re-saved, they are removed from the combination.

B) 06 The AISC 14.1 database has been updated to be consistent with the published profiles from the AISC and the profiles previously included in the TUBE table have been removed. Note they are maintained in the AISC Legacy database and if needed, this database can be used for the US profiles by selecting this in Configurations>Sections on the Start Screen.

B) 07 The GUI has been updated to recognise a REPEAT load case which refers to load cases that do not currently exist, but will be created during the analysis in a response spectrum load case that includes the option IMR. Previously if the REPEAT case referred to such cases, then those cases would be seen as non-existent and removed when the file is resaved.

B) 08 The member query window has been updated to correctly display the reference of a double angle, either long leg LD or short leg SD or in star formation SA. This was being displayed with the LD, SD or SA parameter twice.

B) 09 The member query dialog has been updated to use the following in determining the shear areas of wide flange sections that have additional cover plates:- AY = (D+Tp1+Tp2)*Tw and AZ = 2/3 * (2*Bf*Tf + Bp1*Tp1 + Bp2*Tp2).

B) 10 The GUI save routine has been updated to ensure that when an IBC seismic definition includes a ZIP code, if there are preceding 0s, these are maintained and not stripped off which would cause a problem when the command line is processed.

B) 11 The GUI has been updated to improve processing of physical members when merging beams. Previously, if a beam was associated with a physical member, then merging that beam with another, deleted the physical member with which it was associated. Now with the current implementation, the physical member is not deleted but the beam is removed from included beam list.

B) 12 The GUI has been updated to improve the handling of the windows control of the Editor if the choice to switch from the current to legacy versions is made during the session. As the control of the Editor is handled as a parallel process, there were instances when switching from one to the other would prevent the Editor from starting without restarting the application. This has now been addressed.

B) 13 The 3D rendering routines have been updated in the GUI to handle the event of attempting to draw a poorly defined curve member. Previously this would have cause the program to crash, but now a warning message is displayed.

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(C) Issued Addressed in the Post-Processing Mode (02)

C) 01 The 3D Beam Stress Contour dialog in the Post Processing>Beam>Stresses page has been updated to improve the cross section which will now maintain the correct aspect ratio even when the window is resized. Also the corner stresses are displayed as default and use the format defined in the View>Options>Force Units for the Stress unit, including the number of decimal places.

C) 02 The IS:800-2007 design routine has been updated in order to ensure that the details of a serviceability check reported in the Member Query reflects the design status. Although the ratio was correct, if the ratio exceeded unity, the status would still display this as a Pass. Note that the correct status was reported in the output file.

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(D) Issues Addressed in the Steel Design Mode (00)

(None)

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(E) Issues Addressed in the Concrete Design Mode (00)

(None)

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(F) Issues Addressed in the RAM Connection Mode (31)

F) 01 The British baseplate design has been updated to support CHS sections.

F) 02 The RAM Connection mode has been updated so that it now supports taper members designed with a Moment End Plate (MEP).

F) 03 The display of bolts in the RAM Connection module has been updated to ensure that the radius of the bolt does not use the value of the bolt diameter.

F) 04 The RAM Connection routines have been updated such that when applying multiple connections, the error lists and data repository is cleared to ensure that new designs do not cause the application to crash.

F) 05 The export RAM Connection report routine has been updated to ensure that if the selection does not include any items, then creating a report does not cause the application to crash.

F) 06 The AISC>Bolt database has been updated to include washer thicknesses for all bolts.

F) 07 The AISC>Bolt database has been updated to include Nut Height values.

F) 08 The UK>Bolt database has been updated to remove the redundant ReadOnly column.

F) 09 The UK>Bolt database has been updated to include Nut Height values.

F) 10 The UK>Bolt database has been updated to include Washer Thicknesses for all entries. Previously some entries had a value of 'TRUE'

F) 11 The Europe>Bolt database has been updated to remove the redundant ReadOnly column.

F) 12 The Europe>Bolt database has been updated to include Nut Height for all entries. Previously some entries had a value of 'TRUE'

F) 13 The Chinese>Bolt database has been updated to remove the redundant ReadOnly column.

F) 14 The Chinese>Bolt database has been updated to include Nut Height for all entries. Previously some entries had a value of 'TRUE'

F) 15 The design of CBB gusset connections with WT brace members has been corrected to ensure that the correct area of the brace is utilised.

F) 16 The VXB connection design has been corrected and ensures that the analysis forces are included, which previously simply showed as zero.

F) 17 The export RAM Connection routine has been updated to ensure that where there are multiple connections defined at a node, both connection details are reported. Previously, the first connection would be reported a second time instead of the second connection.

F) 18 The internal method used to assign a connection to a joint has been updated to prevent assignment of failed connections. If these failed connections were included in a report, this would cause the application to crash.

F) 19 The processing of load envelopes in the RAM Connection mode has been updated to account for changes to the selected range of loads after connections have already been defined which previously caused the program to crash.

F) 20 The RAM Connection module has been updated to support members that have profiles defined with spaces in the profile name. Whilst STAAD.Pro does not support spaces in the middle of the name there were a number of standard profiles that had a space at the end of their name which caused the program to crash when used with a RAM Connection joint.

F) 21 RAM Connection module currently included with STAAD.Pro is unable to process connections created with the older version of RAM Connection which was included in STAAD.Pro V8i SS6 20.07.11.50 and earlier. In build 20.07.11.70, this would result in the program hanging and requires STAAD.Pro to be forcibly shut down. Now a warning message is displayed confirming that the connections will be removed. If the old connections are wanted, the *.rsc and *.rcc files in the model folder should be manually copied first.

F) 22 The processing of loads in the RAM Connection module has been updated to ensure that if the model changes and an existing set of connections are re-checked, then the loads are reprocessed.

F) 23 When entering the RAM Connection mode without using a full license, the warning message that is displayed now gives a clearer explanation as to the cause and action that can be taken.

F) 24 The RAM Connection input dialog has been reformatted to be more in keeping with other dialog boxes found in STAAD.Pro.

F) 25 The processing of materials included in the STAAD model when entering the RAM Connection mode has been updated to give a clearer status on their status.

F) 26 The Basic Connection templates have been updated to improve the reference of angle profiles used in the templates which previously may have used sections other than those listed in the title.

F) 27 The RAM Connection Report Export has been updated to ensure that the details of Ratio and Status are updated when the connection designs have been updated.

F) 28 The RAM Connection module has been updated to address an issue which would occur if attempting to design multiple connections and one of the connections returns the status as 'Not Designed', if this connection was opened, then this would result in the application crashing.

F) 29 The routine to select joints has been updated. It is possible to select a connection in the graphics window, then use the menu option Select>Select Connections>Select Identical Connections. This was previously causing the program to crash.

F) 30 The RAM Connection Results sheet has been updated to ensure that the Status field correctly reflects the design status. Previously, a design which had a ratio < =1.0 would display as 'No Good' and if the ratio > 1.0, then it would display 'Pass'. Now the correct logic has been applied.

F) 31 The RAM Connection baseplate design has been updated to ensure that the details of the anchors are defined in the correct units.

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(G) Issues Addressed in the Advanced Slab Design Mode (00)

(None)

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(H) Issues Addressed in the Piping Mode (00)

(None)

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(I) Issues Addressed in the Editor, Viewer and other modules (01)

I) 01 The STAAD.Pro ISM module (StructLink) has been updated to ensure that if there is a missing profile in the mapping, once it is set , the same mapping is used for all members with that property. Previously, if there had been multiple members with that property, the same mapping would have to be made multiple times.

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(J) Issues Addressed in OpenSTAAD (01)

J) 01 The OpenSTAAD example in an MS Word document has been updated to use the current OpenSTAAD Application object.

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(K) Issues Addressed with Documentation and Printing (03)

K) 01 The OpenSTAAD documentation for the function Property > Property.GetElementMaterialName has been updated to correct that the parameter PlateNo should be defined as a long integer and not a string.

K) 02 The section on Troubleshooting> ActiveX Component in MS Excel in the OpenSTAAD documentation has been updated to clarify issues that might occur when attempting to register the OpenSTAAD component.

K) 03 The documentation of TIME HISTORY loading has been updated in section 5.32.10.2 to confirm that a type ACCELERATION is used for GROUND MOTION and type FORCE or MOMENT is for assignment to nodes.

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(L) Issues Addressed with licensing / security / installation (02)

L) 01 Usage of design codes is now activated by the creating commands and processing results.

L) 02 The installation has been updated with the preview images of the models in the STAAD\EXAMP\Advanced Cable Analysis folder.

STAAD.Pro V8i SS6, Build 20.07.11.50 ( 03 December 2015)

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Current Revision posted to RAM | STAAD Wiki by Carlos Aguera on 3/8/2018 1:16:56 PM

What's New in STAAD.Pro V8i SS6, Build 20.07.11.50 ( 03 December 2015) Issues addressed in:-

  • (A) The Analysis/Design engine (22)
  • (B) The Pre-Processing Mode (05)
  • (C) The Post-Processing Mode (02)
  • (D) The Steel Design Mode (00)
  • (E) The Concrete Design Mode (00)
  • (F) The RAM Connection Mode (00)
  • (G) The Advanced Slab Design Mode (00)
  • (H) The Piping Mode (00)
  • (I) The Editor, Viewer and other modules (00)
  • (J) OpenSTAAD (00)
  • (K) Documentation and Printing (05)
  • (L) licensing / security / installation (01)

(A) Issues addressed in the Analysis/Design engine (22)

A) 01 The AISC 360 steel design routines have been updated to address an issue if the first member of the design is a member specified with a MEMBER TRUSS specification and the group of members being designed included a taper member. This was causing the taper member design routines to fail.

A) 02 The IS456/IS13920 concrete beam design routine has been corrected to ensure that the design uses the correct design moments when the command TORSION 1 has been specified. Note the following a) In an IS456/IS13920 concrete beam design, the design bending moment considered at given section is calculated by summing two moments : Mz + an equivalent bending moment derived from Mx, calculated as per the code and b) The torsional moment not only increases the design bending moment, but also the requirement of stirrups. The command TORSION 1 is an instruction to for the design to ignore the effect of torsion. Whilst this was implemented in step b) it was still calculating the additional moment in step a). Now if the TORSION 1 command is specified both parts are ignored.

A) 03 The routine to process a SELFWEIGHT command has been updated to address an issue which would occur if a member list is assigned to the command which would result in the analysis crashing during the processing of this command.

A) 04 The analysis engine has been updated top correct a recent change in the processing of the path of an external User Provided Table which was causing the analysis engine to fail to find the UPT and result in an error being reported and the analysis failing to complete.

A) 05 The member section stresses for a user table wide flange profile where both flanges were defined with the same dimensions were incorrectly reported. The section forces were reported correctly, but incorrectly converted into stress values. Note that this issue was only a problem in the values reported in the output file, it did not affect the stresses reported in the Post Processing mode.

A) 06 The displacement results of an advanced cable analysis have been updated for models that include the CHANGE command.

A) 07 The design of double angle sections to IS 800:2007 has been updated to correct the calculation of shear area that were not checking for the connected leg.

A) 08 An issue with extracting the eigen modes has been addressed which manifest itself with duplication in reported modes. This has been adressed by displaying a warning if duplicate modes are generated and a new command nas been added SET EIGEN CONVERGENCE TOLERANCE 'n', where 'n' is a positive integer which is used to to determine the tolerance and which is set to 1.0e-n. The default is 6 (i.e. a tolernace setting of 1.0e-6). By increasing the value of 'n', it should be possible to eliminate duplicate modes.

A) 09 The floor loading command has been corrected to ensure that the distribution is managed correctly when using any length unit.

A) 10 The routine that calculates the section forces with the command PRINT MAXFORCE ENVELOPE has been corrected to prevent the command from causing the analysis to crash.

A) 11 The analysis engine has been updated to ensure that if it is encountering a problem with available memory on the system while calculating member section forces, the message that is reported in the output file correctly reflects the nature of the issue being faced.

A) 12 The output for an AISC 360-10 design code check specified with a TRACK 2 option, has been slightly modified by providing clearer section headings.

A) 13 The Indian steel design IS 800:2007 has been updated to ensure that the parameter CAN is processed, i.e. to treat the member as a cantilever. Addressed in Build 20.07.11.45 but not documented

A) 14 The FLOOR LOAD specified with the INCLINED option was failing to identify a panel to load with the internal precision of 0.01% of the maximum span of the panel. This now includes an additional test of 0.1 inch.

A) 15 The ACI 318 column design routines have been updated to improve the interaction check which is designed for bi-axial moments. If the design moments about either the Y or Z axes are very small (i.e. < 10e-3 kip-in), then this could have resulted in the capacity for that axis not to be calculated and the equation fail with a divide by zero error. This would have caused the analysis to crash. Now, this part of the interaction equation is explicitly set to zero. This was addressed in build 20.07.11.33, but not documented.

A) 16 The ACI 318 column design routines have been updated to address an issue when the column is subject to very small axial loads. This was resulting in a negative required steel area. This should then result in the assignment of the minimum steel area which was not occurring. This modification was introduced in build 20.07.11.45, but not documented.

A) 17 The analysis engine has been updated to catch a limitation with the Master/Slave command in that it is currently not possible to have a node on a solid entity as a slave node. Previously this would have caused the analysis to crash. Now this situation is captured, the analysis is terminated and an error reported in the output file. This issue was addressed in 20.07.11.45, but not documented.

A) 18 The ACI 318 column design routine has been updated to ensure that when both the axial load and bending moments are small, the routine to check that sufficient steel has been provided completes the check for the full range of possible steel percentages. A fix provided in build 20.07.11.45 meant that this routine ended prematurely and resulted providing insufficient reinforcement.

A) 19 The oneway floor load distribution routine has been updated such that if the panel in which the load in defined is square, unless a specific direction is given, this load will generate a 2 way distribution on the perimeter members. Previously this would have resulted in no load being generated on those members. This is supported with a warning message in the output file.

A) 20 A change in the compiler used to create the STAAD.Pro analysis engine in the SS6 release has resulted in User Tables with a space in the filename/path not being processed. This resulted in an error message being displayed and the analysis terminated. These files are now processed. Note also the GUI has also been updated to ensure that it handles such files with double quote marks ("...") around the filename/path.

A) 21 The analysis engine has been updated to ensure that if a REFERENCE load case is defined including multiple SELFWEIGHT commands with named member list parameters, the lists are now handled correctly, which previously caused the analysis to crash.

A) 22 The intermediate axial forces have been corrected for models which include two or more analysis commands each followed by a CHANGE command and steel design checks follows immediately after CHANGE command. This resulted in the intermediate axial forces being reported with clearly incorrect values.

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(B) Issues addressed in the Pre-Processing Mode (05)

B) 01 The method used by the GUI to determine the screen size and thus display a warning if inadequate has been updated to use the details of the screen that the application has been launched which benefits users who use the computer connected to multiple monitors of varying resolution.

B) 02 The dimensions of 4 CHS sections in the European hot rolled steel database were set to zero, these have been corrected.

B) 03 The GUI has been updated to improve handling models with more than 65537 objects assigned a given combined profile and material combination (i.e. Property reference). Such models were being saved without the full assignment of properties. This has now been addressed and this limit has been removed.

B) 04 The routine used to determine the intersection of crossing members within a given tolerance has been updated to allow for negative values in the routine which otherwise fail to catch some intersections.

B) 05 The Canadian steel database has been updated with plastic properties for the channel sections in the C and MC tables. These are not published values and have been calculated using the section geometry.

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(C) Issued Addressed in the Post-Processing Mode (02)

C) 01 The graphs of members defined with the TRUSS specification have been updated to ensure that the values at intermediate locations are displayed.

C) 02 The post processing of the results for steel designs to the AISC 360-05/10, CSA S16/09/14 and IS 800 codes has been updated to ensure that if deflection parameters are defined, but no explicit serviceability envelope defined, the results might include a reference to a rogue deflection check. Note that this issue did not affect the results in the output file.

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(D) Issues Addressed in the Steel Design Mode (00)

(None)

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(E) Issues Addressed in the Concrete Design Mode (00)

(None)

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(F) Issues Addressed in the RAM Connection Mode (00)

(None)

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(G) Issues Addressed in the Advanced Slab Design Mode (00)

(None)

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(H) Issues Addressed in the Piping Mode (00)

(None)

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(I) Issues Addressed in the Editor, Viewer and other modules (00)

(None)

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(J) Issues Addressed in OpenSTAAD (00)

(None)

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(K) Issues Addressed with Documentation and Printing (05)

K) 01 The Eurocode 8 Response Spectrum documentation has been updated to clarify the ground acceleration term Alpha.

K) 02 The documentation for Verification Examples, Plate/Shell Elements, Static Element 8 has been updated to clarify the problem.

K) 03 The Technical Reference Manual section 5.37.8 Geometric Nonlinear Analysis has been updated to clarify the correct use of the geometric stiffness flag KG.

K) 04 The Technical Reference Manual section 5.32.3.1 Element Load Specification - Plates, has been updated to clarify the correct specification for pressure loads perpendicular to the surface of the plate is:- element-list PRESSURE p1 (x1 y1 x2 y2).

K) 05 The International Design Codes manual has been updated to include the option of a value 2 for the specification SBLT to indicate the section being fabricated from a cold formed process.

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(L) Issues Addressed with licensing / security / installation (01)

L) 01 Roaming Project Settings have been added to allow models to have the default configurations unified with CONNECT Project. Three capabilities have been introduced and avalilable from the File>Configuration dialog in a new Project Profile sheet.

    1) Create CONNECTED Project profiles. A feature typically used by the project manager, this collates the current set of configuration settings and produces a zip file DefaultConfig.zip, located in the folder c:/Users/(current user)/App Data/Local/Bentley/Engineering/STAAD.Pro V8i SS6. This can be uploaded to the CONNECT Project Portal using the 'Application Settings' on the website of the project. These settings will be used by any model that is set to use this project and has the option 'Use Roaming Profiles' checked.

    2) Use Roaming Profiles. Typically used by any design team member working on a CONNECTED project. When this is set, then any model associated with a CONNECTED project will obtain the assigned settings for the project that has been uploaded by the project manager as defined above.

    3) Detemine the default CONNECT project to pre-select a project in the Project Chooser dialog when associating a STAAD.Pro model with a CONNECTED project.

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STAAD.Pro V8i SS5, Build 20.07.10.64 ( 22 July 2014)

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Current Revision posted to RAM | STAAD Wiki by Carlos Aguera on 3/8/2018 1:16:56 PM

What's New in STAAD.Pro V8i SS5, Build 20.07.10.64 ( 22 July 2014)

Issues addressed in:-

(A) Issues addressed in the Analysis/Design engine (91)

A) 01 The output file has been updated to include the number of combination cases in the Problem Statics section after an analysis has been performed.

A) 02 The section properties reported in the output file for members which have been modified with a reduction command (typically rectangular concrete profiles) now account for the reduction in the values reported.

A) 03 The EN1993-1-1 design module has been updated to correctly handle Tee section profiles that have been defined as TRUSS (hence have no end moments), which was causing an error when calculating the end bending stresses.

A) 04 The FEMA 356 Pushover analysis has been updated to support a selection of a mode shape, with a MODE SELECT (n) command, which may include the required 75% of mass participation. Note that a CUT OFF MODE command may be needed to include details ot the required mode shape. Previously only the first mode would be considered and if this did not include the requisite mass participation, the analysis would end.

A) 05 The IBC 2006 seismic load has been updated to correct a recent issue where the moments due to the ACCIDENTAL setting were not getting calculated. Note this was shown in the output report as zero.

A) 06 The IS 800:1984 design code has been updated to check for a stiffened element as per clause 3.5.2.1(b). Also if a wide flange has an additional cover plate, there are checks for whether plate width is the same as the flange width and if it is greater, check for (bp-2*b1)/tp.

A) 07 The PRINT MEMBER PROPERTIES command has updated to ensure that the name reported in the output file for User Table sections is listed as UP rather than ST.

A) 08 The Eurocode design module EN1993-1-1 has been updated to address an issue when considering torsion. When TOR 2 option was specified, the value of the torsional moment being used when multiple load cases were specified in the LOAD LIST was being incorrectly initialized. This has been fixed so that the value of total torsion is initialized correctly.

A) 09 The command PRINT MEMBER STRESSES has been updated to ensure that the direction of peak combined axial and bending stress so that when stresses for combinations are reported for unsymmetrical sections such as Tee sections, they are accounted for correctly.

A) 10 The cable analysis routines have been updated to correctly account for the behaviour of cables entities that are exactly vertical.

A) 11 The analysis engine has been updated to support processing an Abort request if the button is pressed whilst the analysis is processing section forces or the displacement file.

A) 12 The pushover analysis has been updated to allow HSSP sections to be recognised and used as bracing members.

A) 13 The analysis for tension or compression only members has been improved by including the effects of self weight in the loading steps. Previously it was including the effects of strain and temperature, but without the self weight contribution, which could introduce an effect of the force for which the member was not intended to support. Additionally the AISC 360-10 steel design has been updated to ensure that the slenderness calculation takes the average of axial force at either end of the member. Previously it would take the axial force from the start of the member only.

A) 14 The analysis method for handling a response spectrum with SIGN and DOMINANT parameters has been updated to correctly account for these as per the technical reference 5.32.10.1.1.

A) 15 The analysis engine has been updated to support the inclusion of UNIT commands with a load case definition.

A) 16 The Canadian steel design module S16-01 has been updated to correct the flexural torsional buckling capacity which required the solution of a cubic that was getting calculated incorrectly and thus indicating a difference to the results of the S16-09 design which was being performed correctly. Additionally, the calculation of Ce for members subjected to combined action of axial compression and bending has been updated which should not include the K factor which was done previously.

A) 17 The analysis routines have been updated to include an additional test for the density defined for a material. If this exceeds 10x the density of steel a note is posted in the output file informing the user of what would normally indicate an incorrectly entered value.

A) 18 The IS1893 seismic analysis has been improved. A problem was noted where the statics check did not match the reported base shear. The issue was in printing LOAD DATA information in the output file which did not include all the some floor levels. This was caused while processing seismic data the floor levels are identified as the height (or Y-coordinates) of the joints where masses are assigned. If any joint on a particular floor level did not have any mass assigned to it the entire floor level is ignored. This resulted in some of the masses being ignored. However during load vector generation the program correctly incorporates all masses within analysis. Thus STATIC CHECK prints the correct data. Thus there is mismatch in PRINT LOAD data info and STATIC CHECK info. The program now checks all the joints present at a particular floor level to see if any mass is assigned or not without completely ignoring any floor level.

A) 19 The pushover analysis has been improved to ensure that the loading condition determined by the pushover specification is created and can be analysed. Under certain conditions the loading definition would cause the analysis to crash.

A) 20 The IS 13920 Indian concrete design module has been updated to ensure that a warning of excessive reinforcement (i.e. greater than 2.5%) is not reported when the actual reinforcement is less than this.

A) 21 The concrete design module to the Mexican concrete code has been updated to address an issue that occurred when attempting to perform a design with a LOAD LIST command to limit the load cases to include in the design. This would result in the design process to crash.

A) 22 The analysis routines have been updated to include any property reduction factor assigned, in the calculations of section displacement and moment calculations.

A) 23 The AISC 360-10 design for torsion to DG9 has been corrected which was previously incorrectly using the member sequence number as the member reference number.

A) 24 The AISC 360-10 steel design where torsion checks are included has been updated to account for situations where members listed for design were not being reported. The results reported on those members were correct, but not of the requested list.

A) 25 The NORSOK steel design module has been updated to clarify the critical clause when Eqn 6.15 is governing. This may be in fact a result of Eqn 6.44 and if so, that is now reported.

A) 25 "The AISC 360-10 design for single angles has been updated to address slenderness calculations. During the slenderness checks, where both compressive and tensile cases existed, the check would be determined by the compressive cases. Also, it was failing to ensure that the check was being performed on serviceability cases.

A) 26 The Canadian steel design modules have been updated to ensure that the S16-01 code is used where specified. Where multiple parameter blocks and code checks are performed, a second or subsequent S16-01 would revet to the new S16-09 design. Additionally the design of double channels has been improved to ensure that the plastic properties are used.

A) 27 The AISC 360-10 detail output has been updated to ensure that the values of lambda-p is correctly displayed for the section classification. Note that the correct value was being used in the calculations.

A) 28 The Eurocode concrete design is no longer supported in the batch design. To perform a Eurocode concrete design, the EN1992-1-1 module in the Concrete Mode should be used.

A) 29 The analysis engine has been updated to better handle reporting the stresses in channel sections for combination cases where the peak stresses in one case are axial and another is bending.

A) 30 The output details for the Eurocode steel design module EN1993-1-1 has been updated to ensure that if the parameter CAN is set to 1, then the load case reported in the output is displayed.

A) 31 The design of members to the NF design codes has been updated to ensure that the sign of the axial force in members being design ins considered. Previously the magnitude of the axial force was being used for both compression and tension checks.

A) 32 The Eurocode EN1993-1-1 steel design routines have been updated to better account for torsion requirements. Previously, if any load case being considered in the design introduces torsion stresses, the section capacity would be reduced for all load cases giving conservative design results. Now, the default is that only the load cases which have torsion will have reduced capacity, All other cases will be designed for their full capacity unless stipulated with the TOR parameter.

A) 33 The analysis process has been updated to provide a warning and guidance if the STAAD file contains the definition of a floor diaphragm after a wind definition. Internally this causes the analysis a problem and thus will now terminate the analysis with instructions on how to address the issue.

A) 34 The design of concrete beams to IS456 has been updated to improve the checks for shear reinforcement requirements at a distance D (the effective depth) from the member ends.

A) 35 The design of concrete columns to the Indian design code IS456 has been updated to remove an unnecessary duplicate warning when iterating to find the neutral axis.

A) 36 "The IS1893 Part 4 seismic calculations have been updated to correct an issue for type 2 industrial structures. For these if ST = 1 it indicates Category 1 for which seismic force should be doubled. In that case Ah = (Z/2 * I/R * Sa/g ) * 2. However previously this was not implemented. "

A) 37 The AISC 360-10 steel design routine has had a major update to improve the performance and perform designs in a substantially faster way.

A) 38 The stresses reported in the output file for User Table Wide Flange sections has been updated to support the conditions where the flanges are defined with different dimensions.

A) 39 The Eurocode steel design routines have been updated to improve the design of a General Section that has been indicated that it should be considered as an I section. The shear area for such a section was being incorrectly calculated and hence the high shear reduction factor "rho" was incorrect. This has been addressed so that the shear area as well as the factor "rho" are now calculated correctly.

A) 40 A new design code has been added to the Russian SP 16.13330.2011 specification. This is licensed with the ECC Super Code.

A) 41 The analysis engine has been updated to address the assignments of offsets on PMEMBER definitions to correctly account for the current unit specification.

A) 42 The Direct Analysis method has been updated to insure that tau-b is calculated for cases in which the loading and displacements are small resulting in minimal second order p-delta effects.

A) 43 The output for the command PRINT MEMBER FORCES, which reports forces at sections defined by the command SECTION, has been updated to report a warning if no sections have been defined for members in the list.

A) 44 The AS 4100 Australian steel design routine was updated to improve the automatic calculation of ALB (if not directly specified) for pipe sections defined from a user table resulting in a potential difference in compression capacity. (This was included in SS5, but not documented)

A) 45 The AS 4100 Australian steel design routine was updated to improve the shear capacities for pipe sections from a user table. (This was included in SS5, but not documented)

A) 46 The As 4100 Australian steel design has been updated to improve the calculation of Miz, Miy, Moz and Moy for pipe sections from a user table. (This was included in SS5, but not documented)

A) 47 Some very large models cannot be analysed using the Advanced Analysis engine if the matrix formulation exceeds the amount of memory including virtual memory available. If this limit is reached a warning message is displayed in the output file.

A) 48 This is just a note to confirm that the AISC 360-10 will not work on Windows XP due to a Microsoft component that is not available on this platform.

A) 49 The method used with the IMR parameter in the Response Spectrum definition has been updated to improve capturing details of the mode shapes requested in the load cases specified (STARTCASE). The method that calculated the member end forces and reactions only included the details of the last IMR case for each spectrum command. The applied loads and displacements were OK however. REPEAT LOADS would fully work but LOAD COMB would not combine details of the results such as member forces and reactions.

A) 50 The Indian concrete design IS456 has been updated to ensure that messages reported in the output file are marked with a suitable Warning or Note status.

A) 51 The Indian concrete design modules IS 13920 and IS456 have been updated to improve the method used to determine the support conditions which was failing to find supports in order to create the design entity when using the COMBINE parameter.

A) 52 The GUI has been updated when processing the AMSE NF design code parameters and report a warning if a negative value of NSF is entered.

A) 53 The GUI has been updated when processing the AMSE NF design code parameters and report a warning if a negative value of KZ is entered.

A) 54 The GUI has been updated when processing the AMSE NF design code parameters and report a warning if a negative value of KY is entered.

A) 55 The Indian shear wall design module to IS 456 has been updated to improve the method used to obtain the shear forces used in the design which was previously resulting is grossly over designed reinforcement.

A) 56 The processing of member concentrated moment loads has been improved. Previously these loads could have resulted in a failure of the analysis.

A) 57 The processing of seismic weights has been updated to allow the definition to use only a small fraction of the actual weight that would accrue from considering the structure self weight.

A) 58 The AISC 360-10 design routine has been updated to ensure that if Cb is entered then this value is used and that the critical section is reported in a detailed report.

A) 59 The Canadian steel design code S16-09 has been updated to improve the slenderness calculations to ensure that the axial force and direction of force are considered correctly.

A) 60 The routine used in STAAD.Pro to determine floor and snow load distributions have been improved in order to determine the plane of loading which occasionally used to fail and thus return no loading for floor or snow load commands.

A) 61 The method for calculating the section modulus of user table wide flange sections has been updated to address a recent change that allowed different sized flanges to be defined which results in an offset location for the centroid which was previously not being accounted for.

A) 62 The Indian concrete design routines for the IS 13920 code has been updated to ensure that the correct confinement reinforcement is reported. Previously this could have been reported oversized.

A) 63 The analysis processing of seismic joint weights has been enhanced to allow the use of node groups in the joint weight specification.

A) 64 The creation of T sections from wide flange sections defined in the database relies on the definition of Ct, the distance from the top flange to the centroid for the T section to be defined in the database. This filed has been added to tables where they were previously missing.

A) 65 The Indian concrete beam design to IS 13920 has been updated to address the situation where two members have been combined with the COMBINE parameter and the forces results in the second part requires more reinforcement than can be provided. Previously there was a printing issue which reported the requirements of the first part in both members.

A) 66 The analysis engine has been updated to better handle incorrectly specified INACTIVE MEMBER commands following an analysis specification, but does not have the required CHANGE command and display a suitable warning and will internally include the command. However, the correct procedure should be to include the command. Also if an INACTIVE MEMBER command is specified after load case definitions that follow an analysis specification, the analysis engine will report this error too.

A) 67 The analysis engine has been updated to ensure that it can handle both SET WARN and SET WARP commands. Note these both use the same same first 3 characters, thus require all 4 characters to be used in order to use the command. See the Technical Reference manual section 5.5 for more information on use of the SET commands.

A) 68 The analysis results for a combination that includes a both standard static and response spectrum cases has been enhanced. Previously the results of a response spectrum would only generate positive results and end two would be inverted resulting in odd results for end two of a member. However, now using the SIGNED option for a response spectrum definition , in which the results are signed based on a mode shape, then the results for a combination with static cases are consistent.

A) 69 The results of shear stresses reported in the output file using PRINT MEMBER STRESSES when used in conjunction with the option SET Z UP has been rectified.

A) 70 The BS8110 concrete design module has been deprecated in this release. Design to this code should be performed with the Concrete Design Mode.

A) 71 The AS41000 steel design module has been updated to correct an issue in determining the maximum bending moment for members defined by multiple segments , i.e. include node points along the member length.

A) 72 The S16-09 Canadian steel design routines have been updated to ensure that the design identifies the condition when a wide flange section is class 4 slender in flexure when being reported. The design itself was performed correctly.

A) 73 The Russian steel design routine has been updated to support the design of tube sections

A) 74 The design report for a user table section designed to AS4100 has been updated to ensure that the report indicates that the section is a UPT profile for a USER TABLE.

A) 75 Two additional SET commands have been added to reduce the level of detail in the output file. SET WARN OFF will suppress any warning messages that would otherwise be reported. SET NONOTE will suppress any notes generated by the analysis that would otherwise be reported.

A) 76 The AISC N690 codes, 1984 and 1994 , have been updated to ensure that the allowable stresses are multiplied by the their corresponding stress limit factors

A) 77 The AISI cold formed steel design routine has been updated to ensure that it prevents HSS sections from being used as they are currently excluded and would otherwise cause the program to crash.

A) 78 The processing of quad plates has been enhanced to correct any unbalance in the element K-matrix for every quad that is non-zero in flatness.  Now the global static check will be in balance even with badly warped plates. This program change is suggested in Professor E. Wilson's textbook. This change does not make this a good non-flat plate element but simply fixes the worst aspect of a non-flat plate element.  It is recommended that the GUI tool ‘Check for warped Plates…’ be used to identify out of plane elements and correct them as required.

A) 79 There has been an update in the calculation of the ASCE transmission tower code 10-97 to ensure that the correct value of KL/r is used for single angles according to the specified ELA and ELB settings rather than a simple L/r calculation.

A) 80 The steel design code AS4100 has been updated to correct the calculation of Ms (Nominal Moment Capacity), which in the SS5 release incorrectly introduced a term alpha-sz which is not required.

A) 81 A warning is now posted if a dynamic analysis is requested with a model defined with one way entities. In STAAD, the dynamic cases are solved after all the statics cases. The stiffness matrix used is that resulting from the last iteration of the last static case before the current PERFORM ANALYSIS command is used. Thus the stiffness contribution for any entities inactive after the final iteration will be absent in the stiffness matrix, and, the eigensolution will be based on a structure sans those members.

A) 82 The ACI 318-08 design of T sections has been updated to clarify the reason if the required steel exceeds the maximum permissible and the area reported in the track 2 detail report has also been corrected.

A) 83 The AISC 360-05 and AISC 360-10 design codes have been updated to correct the calculation of slenderness ratio from entered values of Ky and Kz. The calculation of KL/r for one axis was using the K for the other, thus for any member if the values entered for Ky and Kz were different, this would result in incorrect slenderness values and hence compression capacity, thus ultimately the interaction ratio.

A) 84 The output of the AISC 360-10 with a TRACK 0 setting has been updated to correctly indicate the length units being used in this format as feet rather than inches.

A) 85 The module for ACI 318 column designs has been updated to improve the design of large sections subject to small axial loading. The procedure that estimates the location of the N.A. with little or no steel requirements has been updated to ensure that when only the minimum reinforcement is required, that is provided.

A) 86 The critical moment reported in the member query for a concrete design to ACI 318-05 has been updated to display the correct value as reported in the output file.

A) 87 The Advanced Cable Analysis has been improved to prevent a memory allocation error which occurs if the SET NL command has not been included.

A) 88 The analysis engine has been updated to ensure that only reference cases defined as type MASS are used to generate a mass model, previously if the title included the keyword mass, then that was also used to create the mass matrix.

A) 89 The processing of rigid diaphragms has been updated such that if a rigid diaphragm is defined with an explicit master node, but without any reference load case type MASS, it will process the model accordingly. Previously, the analysis would have reported this as an error. Additionally, in such situations, as there is no mass associated with the diaphragm, the output will report this mass as '--'.

A) 90 The AISC LRFD 3rd Edition code check for single angles has been updated to ensure the correct section properties are used when multiple CODE CHECK commands are run and the associated member list differed. This issue was addressed in 20.07.09.20, but not documented.

A) 91 The Russian wind load module has been updated to prevent the analysis from crashing if there are no mode shapes in the wind direction.

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(B) Issues addressed in the Pre-Processing Mode (36)

B) 01 The range of sections in the TATA Structura database have been updated to match their current catalog.

B) 02 The European steel database has been updated to correct the values for DIL section profiles.

B) 03 The GUI has been updated to improve the display of user table wide flange sections which have been defined with only one flange dimension to use this for displaying the second flange as is used in the analysis.

B) 04 The GUI has been updated to include the parameter STIFF (spacing for stiffeners of plate girders) for the AISC 360 steel design codes.

B) 05 The method used to determine the location of the design code parameter files has been updated to use a registry setting.

B) 06 The user tool 'Add Materials' has been updated to version 1.3 which does not require the macro to have the OpenSTAADUI library

B) 07 The graphical user interface Specifications dialog has been updated to ensure that when a Floor Diaphragm has been defined and is edited, it does not result in creation of a duplicate command.

B) 08 The Perform Cable Analysis page in the Analysis/Print Commands dialog has been updated to include the additional provisions for an Advanced Cable analysis.

B) 09 The GUI has been updated to indicate the nodes that are included in a Rigid Floor Diaphragm command by becoming highlighted if the option 'Highlight Assigned Geometry' is selected in the Specifications dialog.

B) 10 A new wind load routine has been added to the program to define wind loads according to the Russian SP20.13330.2011 specification.

B) 11 The material handling routine in the GUI has been updated to ensure that adding new materials are correctly referenced in the dialog and material table.

B) 12 The Member Query dialog has been updated to display the torsional modulus IX for K sections from the STO ASChM database rather than displaying a value calculated from the basic section dimensions.

B) 13 The GUI has been updated to improve handling of the MODAL DAMPING command when the CALC option is used. Previously, if either ALPHA or BETA values were omitted, this resulted in the GUI reporting this as an error.

B) 14 The current Russian seismic load generator (SNiP II-7-81) has been updated to also include the current code SP 14.13330.2011.

B) 15 The processing of the time history definitions has been updated to ensure that if they include a SCALE parameter, that data is written out to the STD file when the file is saved from the GUI which previously was being removed. However, if a file with this parameter was opened and the file analysed, the scale parameter was included in the analysis.

B) 16 The ASCE wind loading module has been updated to ensure that when determining the wind forces on a leeward wall on a building structure, the value of Cp is determined from the ratio of given building dimensions and linearly interpolated from the values for ratios of 1, 2 and 4 as per figure 6.6 of the ASCE 07 specification.

B) 17 The GUI has been updated to ensure that if a Eurocode 8 (2004)response spectrum definition is modified and set to soil types D and E, these values are being saved to the STD file for analysis.

B) 18 The GUI reading of a STD file has been updated to correctly validate a floor spectrum command THPRINT parameter. Previously the correct setting of 2 for THPRINT was being identified as an invalid entry which is not the case.

B) 19 The tool to test for warped plates available in the Tools menu has been updated to ensure that if a tolerance has not been set in the View>Options>Tolerance, then a default value for the tolerance is used rather than displaying all the plates suggesting that they had all failed even though they may have an angular deviation of zero.

B) 20 The addition of Reference Load Cases has been updated to ensure that if they are created in a model where primary load cases have already been defined, the END REFERENCE LOAD is located in the correct position in the file which was previously being reported as an error.

B) 21 The list of design codes in the Design>Concrete page has been updated to include details of the ACI 318-99 code.

B) 22 The GUI has been updated to recognise the optional command CHECK STOREY DRIFT when included as part of the IS1893 response spectrum definition which was previously being displayed as an error when a file was opened with this setting.

B) 23 The South Korean database has been updated to correct the area defined for a 200x80x8/11

B) 24 The GUI has been updated to allow the design commands such as CODE CHECK, SELECT, to be assigned from the GUI for the Spanish steel design code NBE MV103.

B) 25 The STAAD.Pro GUI has been updated to ensure that if a model is opened, the input data displayed in the Editor and the graphical view modified to display a section of the model with 'Tools>Cut Section', the program will not crash if the Editor is then closed.

B) 26 The assignment of beta angles using the method 'Assign using edit list' has been updated to ensure that the assignment list entered is saved in the STD file.

B) 27 The file reading routine in the GUI has been enhanced to better manage working with models which have large numbers of load cases that were previously taking a long time to load into memory.

B) 28 The method used to update the display of member labels has been slightly updated to ensure that when a beta angle is assigned with a cursor, the label is refreshed immediately, and does not require the model view to be refreshed in order to see validation of the assignment.

B) 29 The descriptions used in the recent addition of the Colombian seismic code NSR 10 have been updated to ensure the full text, data entry cells and unit information can be seen without re-arranging the column widths.

B) 30 The menu item Commands -> Miscellaneous -> Check Soft Story (IS:1893) has been modified to ensure that if activated, inserts the command in the correct location in the input file associated with the IS 1983 static seismic load definition. There is an additional option for defining a SOFT STORY CHECK associated with rigid floor diaphragms. These command lines have an additional parameter of either 1893 or ASCE7 to indicate which code provisions should be checked against. The GUI was stripping these code indicators off which has been addressed.

B) 31 A minor change has been made in the Backup Manager to allow the column heading to be localised for international Language Pack installations.

B) 32 The Create User Table dialog has been updated to ensure that the local context menu for user tables entries is supported. i.e. right click in the list of entries to display 'Edit' or 'Delete' and these commands are now actioned.

B) 33 The GUI handling routines for external user tables has been updated to prevent duplication of property assignments when the file was re-saved.

B) 34 The details of Ry and Rt specified in a material were not correctly displayed in the Materials table.

B) 35 The GUI tool that displays Node-Node distance has been updated to use the structure length display unit option setting as specified in the View>Options dialog. The same update has been applied to the storey height and mass eccentricity labels in the Earthquake Mode.

B) 36 The GUI has been updated to better handle miscreated commands. Whilst the GUI would identiy these and remove them from the input file (after indicating with a warning), in some instanses, if the file was subsquently opened in the Editor, modified and saved, this would cause the program to crash as it tried to remove a command that had already been removed.

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(C) Issued Addressed in the Post-Processing Mode (13)

C) 01 The post processing results for a response spectrum load case which has been defined to combine the effects of modes using the ASCE method has been corrected to evaluate the section forces between the ends with a linear interpolation. The results reported in the output file were correctly reported.

C) 02 The method used for calculating the stresses reported for the European IPN shapes have been corrected.

C) 03 The 3D Beam Contour has been updated to ensure that the stress point locations for tube sections are defined in the notional corners

C) 04 The Member Query dialog report for a design performed on a member to the Canadian S16-09 code has been corrected to display the forces for the governing condition with the correct conversion factor. Note this issue did not affect the design.

C) 05 The 3D Beam Contour has been updated to ensure that the stress point locations for rectangular solid sections are defined in the notional corners.

C) 06 The 3D Beam Stress Contour diagram has been updated to show the correct stress points and legend for tapered I sections.

C) 07 The 3D Beam Stress Contour diagram has been updated to show the correct stress points at the bottom of standard wide flange sections.

C) 08 The post processing page that displays the contour maps of plate models has been updated to address an issue that prevented custom contour maps to be defined.

C) 09 The result diagrams for a PERFORM DIRECT ANALYSIS with an LRFD specification has been updated to ensure the load factor appropriate to the specification is used in the diagrams.

C) 10 The stresses reported for standard steel channel profiles in the post processing mode has been updated to use the same method used in the analysis engine by taking the location of the centroid from the database. Previously, the values reported in the post processing mode would be calculated based on a simplified section resulting in different values from the analysis.

C) 11 The stresses reported for defined and European tube sections due to minor axis bending has been updated. Note that the values reported in the output file and used in the design were correct.

C) 12 The routine used to display contour maps of Max Absolute Principal Stresses has been updated to ensure that the values associated with the plates included the absolute max of both the max and min stresses for both the top and bottom surfaces.

C) 13 The annotation of axial load diagrams has been improved for members which have a change in axial force along the member length. If the load at one end was very small, this could result in the labels being displayed off screen and a misplaced reference line.

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(D) Issues Addressed in the Steel Design Mode (01)

D) 01 The Steel Designer mode has been updated to use the trust licensing schema as elsewhere in STAAD.Pro.

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(E) Issues Addressed in the Concrete Design Mode (07)

E) 01 The Eurocode EN1992-1-1 concrete design in the Concrete Design mode has been updated to ensure that the check stage performed on members is consistent with the initial design stage. The load combination reported as controlling after the first design was that requiring the greatest area of steel reinforcement, whereas that reported as controlling during the second design (a check on the existing reinforcement) was that giving the highest utilisation ratio. The code is now amended to create all the bars, and then report the combination with the greatest utilisation ratio.

E) 02 A new design code has been added to the Concrete Design mode for the design of concrete beams and columns to the Canadian CAN/CSA - A23.3-04 specification (reaffirmed in 2010 and including amendments 1,2 and 3). This is licensed with the STAAD CAN/AUS/SA license.

E) 03 The BAEL design routines in the Concrete Design mode have been updated to better handle the use of gamma-s in the shear steel calculations. Also, it no longer forces the design to have longitudinal bars to hang shear links from.

E) 04 The BAEL 91 concrete beam design routine in the Concrete Design mode have been updated to improve the implementation of the method called "Flexion Composee", which takes account of the axial force in a beam member as well as the bending moment. This computes the centre of pressure for an equivalent offset axial force, and then checks whether this position lies between the top and bottom steel, in order to determine if the section is entirely in tension. Previously this did not always take into consideration the the direction of bending to compute the location of the neutral axis.

E) 05 The ACI 318-05 reporting routines have been updated. When producing the detailed design output for a shear zone, the final statement should be "OK" or "NOT OK" depending on whether the calculated capacity of the shear steel and concrete is larger or smaller than the applied shear. The test actually reported whether the shear capacity is zero or not. This issue only affected the report, not the design.

E) 06 The IS13920 seismic provisions in the IS456 column design has been updated when checking clause 7.1.2/7.1.3, instead of checking (min dimension/ max dimension > 0.4) it checked against the beam requirement (min dim < 0.25 max span ).

E) 07 The routines to determine the the initial requirements of compression reinforcement in beams for the ACI 318-05 beam designs has been improved. The effective depth used in the initial stages now better accounts for the estimated bar sizes to improve the chances of identifying a suitable bar arrangement.

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(F) Issues Addressed in the RAM Connection Mode (04)

F) 01 The RAM Connection mode requires the use of a RAM Connection license. This will be logged when the mode is used, however an option to turn this off has been added to the Configuration dialog, when only a small subset of connection types will be available.

F) 02 The CBB gusset plate connection routine in RAM Connection has been updated to improve the range of options of angle orientation that can be used for brace members.

F) 03 The Design Report that is displayed in the RAM Connection>Connection>Drawing & Result Page has been enhanced to allow twice as much design information to be displayed than previously, e.g. twice as many design cases.

F) 04 The current implementation of RAM Connection does not support Windows 8 for display in the Drawing & Results sheet. Previously this caused the program to crash, now a warning message is displayed.

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(G) Issues Addressed in the Advanced Slab Design Mode (00)

(None)

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(H) Issues Addressed in the Piping Mode (00)

(None)

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(I) Issues Addressed in the Editor, Viewer and other modules (11)

I) 01 The interface for interoperability with Bentley Connect Scenario Services (cloud analysis), has been updated to provide a smoother user experience.

I) 02 The Structure Wizard module has been updated to address a recent issue introduced when using the Import CAD Model>STAAD Model that prevented models from being imported and locked the application.

I) 03 The ISM interoperability module has been updated to improve the update of the STAAD model from a repository where the ISM physical members are sub-divided into the STAAD analytical elements with offsets.

I) 04 The Japanese steel database included in Section Wizard has been updated to correct the values of torsional modulus.

I) 05 The ISM interoperability module has been updated to address an issue which occurred if the ISM repository included duplicate nodes which resulted in the StrucLink interface failing reporting an error.

I) 06 The ISM interoperability module has been updated to ensure that a series of analytical members that have been collated into a single physical member in the repository, are not replaced by a single analytical member when the STAAD model is updated from the repository.

I) 07 The update process in the ISM interoperability module has been updated to ensure that any material properties set in the model are not removed if they are not defined in the ISM repository.

I) 08 The ISM update process has been modified to ensure that this does not lead to a lock-up occurring whilst attempting to create a backup file. (This was addressed in SS4 but not documented)

I) 09 The update process in the ISM interoperability module has been updated to ensure that members that have been deleted in the STAAD.Pro environment are removed from the repository during the update. (Issue addressed in SS4, but not documented)

I) 10 The Indian ISMB database used in Section Wizard has been updated to include the correct dimensions for an ISMN 100 profile.

I) 11 The ISM import process has been updated to better handle channel sections to ensure that their alignment matches the definition as per the ISM repository. (This was implemented in SS5, but not documented)

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(J) Issues Addressed in OpenSTAAD (03)

J) 01 A new OpenSTAAD function IsAnalyzing() has been added to monitor the status of an analysis process. The function returns an integer with a value of 1 whilst the process is running and 0 if the analysis has completed. The following is an example of how the function could be used:-

Dim stat as Integer

Do While stat = 1

Application.Wait (Now() + CDate("00:00:02")) ‘This method will wait for 2 seconds before checking the analysis status

stat = objOpenSTAAD. IsAnalyzing ()

Loop

MsgBox “Analysis has completed”, VbOkOnly

J) 02 5 new OpenSTAAD functions have been added to the Application Object to access the results of dynamic analysis:-

VARIANT GetNoOfModesExtracted();

VARIANT GetModeFrequency(VARIANT varMode, VARIANT varFreq);

VARIANT GetModalDisplacementAtNode(VARIANT varMode, VARIANT arNode, VARIANT varModalDisps);

VARIANT GetModalParticipationFactors(VARIANT varMode, VARIANT varfactorX, VARIANT varfactorY, VARIANT varfactorZ);

VARIANT GetMissingMassParticipationFactors(VARIANT varLC, VARIANT varfactorX, VARIANT varfactorY, VARIANT varfactorZ);

J) 03 The installation of the OpenSTAAD Result object has been modified to operate with the current version of STAAD.Pro. Note this is only provided for backwards comparability, but it is strongly recommended to use the more comprehensive OpenSTAAD Application Object instead.

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(K) Issues Addressed with Documentation and Printing (16)

K) 01 The user report has been updated such that the Node table is now able to support node numbers up to 8 digits. However, note that the analysis engine only supports node numbers up to 999,999.

K) 02 The Technical Support dialog has been updated to report the local information for Japan.

K) 03 The details of the company defined during the installation is included in the User Report as 'Licensed to'

K) 04 The details in a user report for concrete members that have been designed have been updated in that the report item 'Utilization Ratio', which is for reporting the critical utilization for steel design, will now report 'N/A' for any concrete members that have been designed.

K) 05 The documentation for the Eurocode 8 Response Spectrum definition has been updated to clarify that the parameter ALPHA is defined in terms of gravity, hence ALPHA 1 is 1g or 9.81 m/s2

K) 06 The export of user reports to MS Word has been updated to ensure that if the report includes response spectrum data, creating the report does not cause the program to crash.

K) 07 Sections 5.19 and Section 5.19.8 of the Technical Reference Manual have been updated to include details of specifying profile points and stress locations for a GENERAL section type user table profile.

K) 08 The report printed from a Plate Query dialog for the Centre Stresses has been updated to ensure that the value of the Bottom Principal Stress is correctly printed.

K) 09 The documentation for the Australian steel design module to AS4100 has been updated to confirm that the changes published in Amendment 1 , Feb 2012, do not affect the designs currently being performed by STAAD.Pro.

K) 10 The User Reports has been updated to improve handling multiple moving load definitions which were previously being displayed with 'There is no date of this type' and the pagination could over run the bottom of the page.

K) 11 The User Report has been enhanced to support Reference Load Cases and the inclusion of Reference and Notional Load definitions in a Primary Load Case.

K) 12 The User Report has been updated such that the selection of load cases in the report setup dialog does not add loading data form load cases defined by a repeat command or if a combination load case is selected, the loading items from those cases are not included unless included explicitly in the report setup.

K) 13 A new topic has been added to the Technical Reference manual that describes the scope of PMEMBER loading.

K) 14 The User Report has been updated to support the assignment listing when defined to a SELF command and includes a new table for Surface Selfweight commands.

K) 15 The User Report has been updated to indicate the definitions of pre stressed and post stressed loading commands which previously did not indicate the form of the command that was assigned.

K) 16 To aid readability, the User Report displays the title of Loading tables with the load case and name followed by the table type when grouped by load case (default setting).

K) 17 The GUI has been updated to handle when a model has been opened in the Editor and then simultaneously view a User Report. Previously in this situation, if control was changed to the open Editor, changes made and the file saved, this would result in the application to crash.

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(L) Issues Addressed with licensing / security / installation (04)

L) 01 The installation has been updated to ensure that the separate installations of Struclink and Pipelink can be uninstalled after STAAD.Pro V8i SS5 has been uninstalled.

L) 02 The trial period by which a license must be validated by has been reduced to 14 days.

L) 03 All design codes have been set to use the appropriate SELECT license using the Bentley Trust Licensing schema.

L) 04 The API code check module has been updated to correctly report usage with the STAAD US Special license.

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Tags: STAAD.Pro

STAAD.Pro V8i SS5, Build 20.07.10.65 (29 October 2014)

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Current Revision posted to RAM | STAAD Wiki by Carlos Aguera on 3/8/2018 1:16:56 PM

What's New in STAAD.Pro V8i SS5, Build 20.07.10.65 ( 29 Oct 2014)Issues addressed in:-

  • (A) The Analysis/Design engine (27)
  • (B) The Pre-Processing Mode (01)
  • (C) The Post-Processing Mode (00)
  • (D) The Steel Design Mode (00)
  • (E) The Concrete Design Mode (01)
  • (F) The RAM Connection Mode (01)
  • (G) The Advanced Slab Design Mode (00)
  • (H) The Piping Mode (00)
  • (I) The Editor, Viewer and other modules (00)
  • (J) OpenSTAAD (00)
  • (K) Documentation and Printing (01)
  • (L) licensing / security / installation (00)

(A) Issues addressed in the Analysis/Design engine (27)

A) 01 The inclusion of the new Russian steel design code SP 16.13330.2011 adversely affected the design routines for both Russian steel codes, SNiP 2.23.81-1999 and SP 16.13330-2011. This has been addressed and the design result for a member is now available in the member query window by double clicking on a member and the governing design clause reported in the Post Processing Unity Check results table.

The following outlines the details of issues addressed in both codes.

  • The addition of the SP 16.13330-2011 code introduced a variable that was not correctly initialised for each member that was being designed. This resulted in that is would be possible that the second and subsequent members would not be correctly designed.
  • The design method used CHECK or SELECT was not being reported correctly in the output file.
  • The pagination has been improved to ensure that all details for a TRACK 2 that exceed a page length are included on a new page and not truncated from a hard copy.
  • The details from the design are now included in a Steel Design sheet of a member query.
  • The governing clause and ratio is now reported in the Post Processing mode, Beam>Unity Check Page, Design results table.

Additionally issues relating specifically to SNiP 2.23.81-1999

  • Members subject to axial tension were being checked as though subject to compression.
  • The compression slenderness calculation as per clause 6.15 was not being properly recorded.

A) 02 The processing of a FLOOR DIAPHRAGM has been updated to ensure that 1) the details reported in the output file refer to the master node as per the input command and 2) the X ordinate of the reported centre of mass is correctly referenced, previously the Y value was reported.

A) 03 The processing of a FLOOR DIAPHRAGM has been updated to ensure that if either XRANGE or ZRANGE is used in a command, then this will be used to define a limited area for the diaphragm.

A) 04 The presence of CHANGE command along with rigid diaphragm is internally corrupting any load data present after the CHANGE command. When a rigid diaphragm is included in the model, the program internally generates primary load cases to calculate the Centre of rigidity. This has now been addressed.

A) 05 The IS 1893 Spectrum processing routine has been updated to account for conditions where INACTIVE MEMBERS are included which would result in generating a Read/Write failure and cause the analysis to stop.

A) 06 The IS1893 Part 4 code has been corrected in processing the SS (type of soil) and SA (spectral acceleration) terms. These were being inverted, ie soil type taken as the SA value and spectral acceleration as the SS value.

A) 07 The processing of a completely vertical cable with the Advanced Cable analysis has been addressed.

A) 08 The Advanced Cable Analysis output has been enhanced with details of instabilities and zero stiffness warnings if present.

A) 09 The Advanced Cable Analysis routine has been updated to catch any instance where the option SET NL has been used to specify a number of load cases less than those needed for the cable analysis and will issue the error message:- ***ERROR: THE MAXIMUM NO. OF LOAD CASES EXCEEDS LC. INCREASE SET NL INPUT.

A) 10 The command PRINT STOREY STIFFNESS should occur after an analysis command. If included before the analysis this was causing the program to crash. Now, this will report the following message and continue:- *** WARNING: STORY STIFFNESS IS NOT CALCULATED. PRINTING STORY STIFFNESS IS A POST-ANALYSIS FEATURE. 'CHECK IF ANALYSIS IS PERFORMED OR NOT.

A) 11 The analysis results for a response spectrum case with the SIGN and DOMINANT options has been further enhanced to ensure that if the response load case only includes node loads this is still handled in the same way as when member loads are included when establishing the section forces.

A) 12 The Canadian steel design code S16-01 has been corrected to address the the calculation of the effective area for class 4 (slender) angles under compression. The effective area calculation was only applying the reduction to a single leg of the angle, but should apply the reduction to both legs of each angle. This correction applies to both single and double angles.

A) 13 The Russian wind routine has been updated to ensure that the dynamic effects are correctly accounted for when the basic analysis engine is used. The results associated with the advanced solver were correctly resolved.

A) 14 The FEMA Pushover analysis routine has been updated to correct the calculation of the base shear which was in turn affecting the displacement calculations after formation of a hinge.

A) 15 The Canadian steel design code S16-01 report has been updated to ensure that the section classification for the critical condition is reported. Whilst it was being calculated and used correctly, it may not have been reported correctly. This has been corrected.

A) 16 The Advanced Cable analysis has been updated to catch loads that have been specified that are outside the scope of the analysis as outlined in the Technical Reference Manual section 1.18.2.8 Advanced Nonlinear Cable Analysis. Now, if inappropriate loads are specified, n error message is reported in the output file and the analysis stopped.

A) 17 The Advanced Cable analysis routine has been improved such that it is now possible to include multiple load cases with a single PERFORM CABLE ANALYSIS command.

A) 18 The analysis engine has been updated to now support Notional Load definitions when the model has been defined using a SET Z-UP definition.

A) 19 The AISC 360 2005/2010 codes have been updated to correctly calculate the slenderness ratios for double channel sections which prior were being reported as zero and thus failing the design with an interaction ratio of infinity.

A) 20 The AISC 360 2005/2010 codes have been updated to address an problem caused when including a FIXED GROUP command that resulted in the program to crash. This has been addressed.

A) 21 The AISC 360-05 ASD design check for tube sections has been updated to correct the minor axis shear capacity Vny and torsional design strength which was over estimating the utilization ratio.

A) 22 The TRACK 2 output from an AISC 360-05 for a member which is governed by the slenderness has been updated to ensure that the values of the design forces are reported correctly.

A) 23 The AISC 360 2005/2010 steel design routines have been updated to allow for higher torsional forces than before which would have displayed in the output file with a string of stars.

A) 24 The AISC 360-10 steel design routine has been updated to correct the calculation of compression capacity for a circular hollow or pipe section to clause E7-19.

A) 25 The processing of the AISC 360 parameter SNU for double angle and double channel sections, has been updated to ensure that when set to 0 (default) it represents a snug bolted fix using equation E6-1. When set to 1, it is treated as a welded or pre-tensioned bolted connection and use equation E6-2.

A) 26 The AISC 360 steel design reports have been updated for circular hollow sections defined in a PIPE user table. If values for shear area have been provided, these will be reported in a TRACK 2 output. However, note that the shear stress calculations in the AISC code are based on the gross area.

A) 27 The AISC 360 torsion check for circular hollow sections has been corrected in the determination of the direct stress which was previously not correctly accounting for the stress due to the applied moment.

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(B) Issues addressed in the Pre-Processing Mode (01)

B) 01 The GUI has been updated to ensure that when creating the STD file from the data that has been created using the GUI tools, the analysis commands are located after the section properties. On occasion the data was added in the reverse order and required the user to re-sort the data in the Editor.

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(C) Issued Addressed in the Post-Processing Mode (00)

(None)

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(D) Issues Addressed in the Steel Design Mode (00)

(None)

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(E) Issues Addressed in the Concrete Design Mode (01)

E) 01 The Concrete design mode has been updated to handle changes in the basic dimensions of beams/columns in the analysis model so that previously defined design results are now correctly invalidated.

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(F) Issues Addressed in the RAM Connection Mode (01)

F) 01 The RAM Connection Module has been updated to allow for double angle sections

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(G) Issues Addressed in the Advanced Slab Design Mode (00)

(None)

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(H) Issues Addressed in the Piping Mode (00)

(None)

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(I) Issues Addressed in the Editor, Viewer and other modules (00)

(None)

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(J) Issues Addressed in OpenSTAAD (00)

(None)

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(K) Issues Addressed with Documentation and Printing (01)

K) 01 The processing of loading defined in Reference Load Cases has been updated to ensure that the correct name is reported and the load details are displayed correctly.

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(L) Issues Addressed with licensing / security / installation (00)

(None)

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Revision History

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Current Revision posted to RAM | STAAD Wiki by Carlos Aguera on 3/8/2018 1:21:19 PM

  
 Applies To 
  
 Product(s):STAAD.Pro
 Version(s):All
 Environment: N/A
 Area: Revision History
 Subarea: N/A
 Original Author:Carlos Aguera
Bentley Technical Support Group
  

This document is organized in a way that newer revisions appear at the top.
Therefore, section numbers will keep decreasing from top to bottom. Also refer
to the What's New section of the Online Help for Major New Features. This
document outlines fixes and last minute changes.

Copyright (c) 1997-2018 Bentley Solutions Center

What's New in:-

STAAD.Pro CONNECT Edition,

STAAD.Pro V8i SS6,

.

STAAD.Pro V8i SS5,

.

STAAD.Pro V8i SS4,

.

STAAD.Pro V8i SS3,

.

STAAD.Pro V8i SS2,

  • Build 20.07.07 QA&R ( 24 February 2011)
  • Build 20.07.07 ( 13 October 2010)

.

STAAD.Pro V8i SS1,

  • Build 20.07.06 QA&R ( 18 March 2010)
  • Build 20.07.06 ( 23 December 2009)

.

STAAD.Pro V8i,

  • Build 20.07.05 ( 21 May 2009)
  • Build 20.07.04 ( 30 October 2008)

.

STAAD.Pro 2007, Build 03 ( 8 July 2008)

STAAD.Pro 2007, Build 02 (14 September 2007)

STAAD.Pro 2007, Build 01 (29 June 2007)

Tags: changes, bugs, Bugs fixed, staad.pro revision history, errors fixed, Revision History, Revision, fixes

User Input Cb33 Ignored

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Current Revision posted to RAM | STAAD Wiki by Seth Guthrie on 3/8/2018 10:34:58 PM
 Applies To 
 Product:Ram Elements
First Affected Version:14.00.00.240
 Found in Version:14.00.01.08
Fixed in Version:
Environment:All
 Area: Design
Severity:High
 Issue #:783779

Problem Description

User input Cb values are not considered. The program always uses the calculated value.

Affects 2005 and 2010 AISC ASD and LRFD codes.

Solution

A fix will be in the next release.  

Tags: Active, design, RAM Elements, Steel Design, known issue, defect

Connections for Gravity Members are Designed for Zero Force

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Current Revision posted to RAM | STAAD Wiki by Seth Guthrie on 3/8/2018 10:44:30 PM
 Applies To 
 Product:RAM Connection
 First Affected Version:All
 Found in Version:8.0.0
Fixed in Version:
Environment:All
 Area: Design
 Subarea: RAM Connection for RAM Structural System
 Issue #:291594 

Problem Description

In RAM Connection for RAM Structural System, the forces imported from RAM Structural System are zero (0) for all load combinations. The problem occurs at connections with gravity members only. Connections for frame members are designed with the correct non-zero forces.

Reason

RAM Connection identifies notional load cases as lateral load cases and any load combination that includes a notional load case is flagged as a lateral combination. RAM Connection skips combinations identified as lateral combinations in the design of gravity-only members. If all load combinations include notional load cases and there are no load combinations with gravity load cases only, RAM Connection will not have forces results to design connections that include gravity members only.

Steps to Resolve

The best option is to define custom load combinations in RAM Frame - Steel mode - Standard Provisions that include just the gravity loads and exclude notional and lateral loads and import them into RAM Connection with the other load combinations from RAM Frame.

Another option is to generate or manually add these additional load combinations in RAM Connection after importing using the steps below. These combinations will be cleared if combinations are imported from RAM Frame at a later date, however.

Step 1

Click on the Generate button in the Home menu - Load Conditions tool bar.

Step 2

In the Generate Load Combinations dialog, select a factored load combination that matches the design code that is selected and then click on the Generate button. The factored load combinations used in the United States are marked in the screen capture below.

Step 3

Check the boxes for all load combinations that include gravity load cases only. Combinations that include gravity and lateral load cases do not need to be selected. These combinations have been imported from RAM Frame and include the notional load cases. Click the OK boxes to close the dialogs and generate the load combinations.

Tags: Active, RAM Structural System, RAM Connection, Load Combination, Notional Load, gravity, known issue, defect, lateral

STAAD.Pro V8i SS6 , Build 20.07.11.45 (30 September 2015)

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Current Revision posted to RAM | STAAD Wiki by Carlos Aguera on 3/8/2018 1:16:55 PM

What's New in STAAD.Pro V8i SS6, Build 20.07.11.45 (28 Sept 2015) Issues addressed in:-

  • (A) The Analysis/Design engine (11)
  • (B) The Pre-Processing Mode (07)
  • (C) The Post-Processing Mode (03)
  • (D) The Steel Design Mode (00)
  • (E) The Concrete Design Mode (00)
  • (F) The RAM Connection Mode (00)
  • (G) The Advanced Slab Design Mode (00)
  • (H) The Piping Mode (00)
  • (I) The Editor, Viewer and other modules (01)
  • (J) OpenSTAAD (01)
  • (K) Documentation and Printing (0)
  • (L) licensing / security / installation (0)

(A) Issues addressed in the Analysis/Design engine (11)

A) 01 The old AISC LRFD design code (pre AISC 360) has been updated to ensure that the design of double channels arranged in a back-back alignment are specifically prevented as these are not covered by the design processes currently available.

A) 02 The Indian concrete design code IS456 (including IS13920) has been updated to improve the determination of bars required. Previously the size of bar was selected based on the minimum area of steel provided which could be a small number of large diameter bars. However, this number may then fail on the spacing checks and thus the larger number of smaller bars could meet the requirement. Now the check for selecting the bar size will include the spacing check as well as the forces check to determine the most efficient solution.

A) 03 The design of tapered members to the AISC 360-05/10, IS800-2007 and CSA S16-09/14 codes has been updated to address an issue which occurred when their design was included in a batch command (i.e. with other tapered members rather than individually), which could result in an incorrect final design as the memory used to store the results was getting overwritten.

A) 04 Seismic weights defined in a FLOOR GROUP failed to be processed for NRC, NTC and Turkish codes. However this was correctly processed for all other codes such as IBC and IS 800.

A) 05 The routines that design concrete members has been updated to correctly process the forces which result form load cases that include response spectrum definitions which previously did not correctly account for the nature of the internal forces. The design forces may or may not have been un-conservative, thus it is strongly recommended that they should be rechecked.

A) 06 The output of a steel design to the Russian SNiP code SP16.13330 has been modified to refer to Appendix G rather than Appendix Z, i.e. the seventh appendix in the code, to determine stability coefficients.

A) 07 The format for mass participation used in the output file has been updated to include an extra decimal place.

A) 08 The Eurocode EN 1993 design routine has been enhanced to allow the identification of hollow sections as cold rolled with an update to the SBLT design parameter. A new value of "2" will signify that the section specified for the member is a cold formed section. The buckling curve will then be chosen as per Table 6.2 of En1993-1-1. Note that the value of SBLT=2 will only be applicable for hollow sections as in Table 6.2. If SBLT of 2 has been specified for any other cross section type, the program will ignore this value and will consider the section as hot rolled and use the appropriate buckling curve.

A) 09 The Australian steel design module AS 4100:1998 has been updated to support the design of web tapered members. Previously the warping constant was not calculated and resulted in the failure of the design. Now the nominal member moment capacity (Mb) for the design of web tapered members as per section 6.1.1(b) uses the properties of the minimum cross section as specified in method (i)

A) 10 The analysis routines that report the analysis forces in the output file with the commands PRINT FORCE ENVELOPE and PRINT MAXFORCE ENVELOPE have been updated such that they now use the revised methods introduced in the last release for load cases which include response spectrum cases and combinations with response spectrum cases.

A) 11 The Canadian steel design modules S16-09 and S16-14 have been updated to correct the calculation of slenderness where the effective lengths LY was used instead of LZ and vice versa.

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(B) Issues addressed in the Pre-Processing Mode (07)

B) 01 The Japanese legacy database should only contain sections that were in the Japanese sections database from SS5. The current legacy database has included shapes that are in the current Japanese database. Note, this is only an issue in the SS6 release SPRO 20.07.11.33.

B) 02 The pipe sections in the US AISC steel database have been updated to correct the labelling of strong and extra strong sections. Hence the Pipe12STD is defined as a PIPX120, this should be PIPS120 and the Pipe12XS is defined as a PIPS120 and should be PIPX120

B) 03 The W profile sections listed in the US AISC steel profile database have been updated to remove spurious blank characters which caused STAAD.Pro to report these as errors when the file is re opened.

B) 04 The plastic properties for Major (Zx) and Minor (Zy) added to the channel table in the South African Database using the formula defined in Raorks 6th edition.

B) 05 The Indian seismic load parameters to IS 1893 - 2002/2005 have been updated such that the 'Generate' option, which can be used to determine the parameters for a given city, creates a correct damping ratio. Previously the value created would have created the percentage value rather then the ratio and thus have been too high by a factor of 100.

B) 06 The tool provided to check for the nature of warped quad plates has been updated such that a default value is set at 5 deg (unless set in an earlier installation, in which case the setting of 30 deg should be manually reset) and a more informative warning message provided indicating the details of the check that has been performed.

B) 07 A new check has been added while processing the toolbar icon that displays the Mode Shape. Previously if there were no mode shape results available such as in the case of creating a new model, then the program would crash.

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(C) Issued Addressed in the Post-Processing Mode (03)

C) 01 The post processing of results of models with load cases defined, but containing no loading, has been updated. Previously this would cause a problem with the section force calculations in other load cases which use a response spectrum load specification.

C) 02 The labels of velocity units in the graphs of the Dynamics>Time-Velocity page have been updated to remove a spurious '/time'

C) 03 The Beam>Graphs page in the post processing mode has been updated to ensure that the graphs capture the correct maximum value of force on the selected member. The problem was introduced in the last release of the program but did not affect any of the results from the analysis, it was just a display issue.

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(D) Issues Addressed in the Steel Design Mode (00)

(None)

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(E) Issues Addressed in the Concrete Design Mode (00)

(None)

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(F) Issues Addressed in the RAM Connection Mode (00)

(None)

Top


(G) Issues Addressed in the Advanced Slab Design Mode (00)

(None)

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(H) Issues Addressed in the Piping Mode (00)

(None)

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(I) Issues Addressed in the Editor, Viewer and other modules (01)

I) 01 The New Advanced Editor has been updated to address a timing issue which could cause the Editor to crash as STAAD.Pro is launched.

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(J) Issues Addressed in OpenSTAAD (01)

J) 01 The example spreadsheet with an OpenSTAAD macro has been updated to correct the routine that counted the combinations to ensure that the numbering correctly included primary load cases.

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(K) Issues Addressed with Documentation and Printing (03)

K) 01 Output for applications Example 11 manual updated to reflect the changes in processing the intermediate results of response spectrum cases that was introduced in the initial release of V8i SS6.

K) 02 The technical reference manual has updated to clarify the response spectrum mode combination methods available when using the IS 1893 code.

K) 03 The help Contents panel has been updated to ensure that selecting an example from the Application Examples >American or British Examples displays the selected example and maintains the selection in the Contents panel.

K) 04 The Graphical Interface Help document updated with topic titles using text only.

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(L) Issues Addressed with licensing / security / installation (03)

L) 01 STAAD.Pro V8i SS6 now incorporates the Bentley CONNECT schema to allow STAAD.Pro models to be incorporated into a company wide project management system.

L) 02 The Readme and Help>About dialog has been updated to display current Legal Notices detail information.

L) 03 The Bentley CONNECT scenario services routines from the previous release have been removed from the program. Note this has been replaced by the new CONNECT project schema.

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Deleting an object that is not visible

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Current Revision posted to RAM | STAAD Wiki by Seth Guthrie on 3/9/2018 5:28:06 PM
 Applies To 
 Product(s):RAM Elements
 Version(s):Any
 Area: User Interface; Modeling

Problem Description

In Ram Elements it is possible through spreadsheet data entry to create an incomplete or zero length object. For example, if you add a member and enter the NJ node, but never enter the NK node and move on, that member is still in the database, but it has an undefined geometry. 

The same kind of thing can also happen with a shell or deck (load area). 

In order for the program to function, any such member either needs to be completed with valid incidence or deleted from the model.

Solution

The key to resolving the problem is selecting the problem member. Since it has no graphics it cannot be selected with the mouse, so the user needs to use Select All (Ctrl + A) or one of the other selection tools like Select - Members - Select all members first.

If any part of the model is hidden, be sure to Unhide (Ctrl +H) first, then Select All.

At that point the item will appear again in the spreadsheet so that the missing data can be added. If the intent is to delete the problem member, first select all to identify it's unique number. Now remember that number or write it down and clear the selection (one click in space will do). Next enter that number in the first row, first column of the appropriate spreadsheet and then only that one object is selected.

To delete it:

  • Right click in the spreadsheet and choose Clear,
  • Right click on the graphics window and choose Delete, or
  • Press the delete key.

Note, you cannot be in the Finite Element View mode when deleting data. 

See Also

Ram Elements Modeling [FAQ}

Tags: invisible, RAM Elements, Modeling, Delete

Ram Elements - Modeling [FAQ]

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Current Revision posted to RAM | STAAD Wiki by Seth Guthrie on 3/9/2018 5:29:47 PM
 Applies To 
 Product(s):RAM Elements
 Version(s):13.0 or later
 Area: Modeling; User interface

Is there a way to add a node or connect two members that are crossing each other?

Select the two crossing or nearly crossing members. Then use Process - Segment selection to introduce a node at the intersection point.  Be sure to check the box that indicates, "Add intermediate nodes at memebr intersections"

There is a tolerance for this that you can control.

There is a similar option in the automatic meshing under Process - Analysis - Finite Element Model tab.

In cases where you have crossing members that should slip past each other, this option should be turned off.

How can I move all or part of my model?

In Ram Elements the position of all members and shells are derived from the node coordinates. To move a structure, you simply need to move the nodes. Tools are provided to make it easy to add, subtract or even multiply the nodal coordinates by a constant as shown in the video below:

www.youtube.com/watch

How can I purge duplicate nodes?

If the model contains 2 or more coincident nodes that are associated with different members or shells you will get an error during analysis, "Nodes "##" and "##" or are equal"

To purge and simplify the nodes:

  1. Select the problem nodes (or the whole model).
  2. Click Process - Purge and reconnect model
  3. Then re-select only the nodes and click delete (nodes connected to members are not deleted).

Note, load areas may need to be redefined after some nodes are removed.

See Also

RAM Elements - View Control FAQ

[[Deleting an object that is not visible]]

Tags: RAM Elements, FAQ, Modeling

Modeling friction support in STAAD.Pro

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Current Revision posted to RAM | STAAD Wiki by Sye on 3/9/2018 7:21:26 PM

Applies To
Product(s):STAAD.Pro
Version(s):ALL
Environment: ALL
Area: Modeling
Subarea:
Original Author:Sye Chakraborty, Bentley Technical Support Group

 

How can I model friction supports in STAAD.Pro

There is no direct way to model friction supports in STAAD.Pro as of now.

However here are some points for you to consider. As long as the lateral force that is trying to cause sliding, is less than the resisting static friction, you may always consider the friction supports as lateral supports providing full lateral restraint. Static Friction (F) is calculated by multiplying the vertical load (W) by the coefficient of friction. So F= Coeff of Friction x W

Start by modeling the friction supports as full lateral restraints ( FIXED, PINNED or FIXED BUT supports as the case may be ). For any applied load, check the Static Check ( from the Postprocessing Mode > Reactions > Statics Check Results table). The Load Fy would give you the total vertical load for the case (mentioned as W above). Multiply that by the coefficient of friction to get friction force F. As long as the lateral force ( Fx or Fy from the Statics Check Results table ) is less than F, you may simply consider the friction supports as supports offering full lateral restraint.

If the Fx or Fz is greater than F, your structure is going to slide and you need to stabilize it by adding additional lateral supports.

 

Tags: friction, friction support

Changing the Base Unit Settings in STAAD.Pro

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Current Revision posted to RAM | STAAD Wiki by Sye on 3/11/2018 7:24:27 PM

Applies To
Product(s):STAAD.Pro
Version(s):ALL
Environment: ALL
Area: General
Subarea:
Original Author:Sudip Narayan Choudhury, Bentley Support Group

In STAAD.Pro Connect Edition, the base units may changed from within the startup page of STAAD.Pro as shown below

In older versions of STAAD.Pro ( v8i and older ), the base units may be changed as explained next

1. Go to the opening page of STAAD.Pro. In this page, you will only be able to see two options in the top menu bar – “File” and “Help”. Refer to Figure 1.

2. In the “File” menu, click on the “Configure” option. Please refer to Figure 1 below.

                                                         Figure 1

3. On clicking on the “Configure” option, the following is displayed (refer Figure 2). 

4. Click on the “drop-down” switch. The current base unit settings will be shown and highlighted. Click on the required Unit Settings and click on “Apply” and “Accept”. Refer Figure 2.

                                     Figure 2

5. Your Base Unit Settings are changed now.

This change would need to have read/write permissions to the staadpro20070.ini. Please ensure that you have the write permissions to the location where the INI file is located. This is located in C:\ProgramData\Bentley\Engineering\STAAD.Pro V8i SSX.

Tags: changing base unit, Metric, how to change base unit, English, base unit

How to copy automatic load combination tables across machines

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Current Revision posted to RAM | STAAD Wiki by Sye on 3/12/2018 6:47:22 PM

Applies To
Product(s):STAAD.Pro
Version(s):ALL
Environment: ALL
Area: Modeling
Subarea:
Original Author:Sye Chakraborty, Bentley Technical Support Group

 

How can I copy automatic load combination tables across machines

 

Related question :

 

Where are the automatic load combination tables stored ?

In STAAD.Pro Connect Edition, the automatic load combination table data are stored in a set of ini files within the folder X:\ProgramData\Bentley\Engineering\STAAD.Pro CONNECT Edition\Language\en where X is the drive where STAAD.Pro is installed.

In STAAD.Pro v8i, the automatic load combination table data are stored in a set of ini files within the folder X:\ProgramData\Bentley\Engineering\STAAD.Pro V8i SS6\Language\USEnglish 

These files are named such that one can easily identify which tables these relate to. For example ACILOAD.ini relates to the ACI Load combination table, AISCLoad.ini relates to the AISC Load Combination table and so on. In addition there is a codes.ini file in that same folder where record of these tables are kept.

 

To transfer or copy these automatic load combination table data from one machine to another, one needs to copy the ini file for the appropriate table AND the codes.ini file from the first machine to the corresponding folder in the second machine. It is recommended that any files being replaced be renamed first so that in case there is any problem after copying the data one can always get back the original files.

Note : Please ensure that you have the read/write access on the folder mentioned above. Else you would not be able to add of modify the data in these tables. 

Tags: copy automatic load combination tables, where are auto load combinations stored, unable to edit auto load combination table, auto load combination table, not able to add a new load to the auto load combination table, saving auto load combination

ISM Revit Plugin 10.02.02.26 Release Notes

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Current Revision posted to RAM | STAAD Wiki by Wentao Zhang on 3/12/2018 10:23:43 PM

Release Date: Tuesday, 13th March 2018

Version: ISM Revit Plugin CONNECT Edition

Version Number: 10.02.02.26

 
Download Instructions

The ISM Revit Plugin can be downloaded from the Bentley store here. For Bentley SELECT subscribers, the ISM Revit Plugin can be downloaded from Bentley Cloud Services here. After signing in to the CONNECTION Center, select Software Downloads under My Support. Once on the Software Fulfillment page, ISM Revit Plugin installers can be located by performing a search on "ISM Revit".

 

Special Notices

The installation of ISM Revit Plugin CONNECT Edition will automatically uninstall any previous versions that were installed. This version of ISM Revit Plugin can be run in Revit 2016, 2017, and 2018.

ISM Revit Plugin requires ISM and Structural Synchronizer (both of which are installed with Structural Synchronizer). More information on ISM and Structural Synchronizer can be found here.
 

New Features

No new features were added to ISM Revit Plugin 10.2.02.26.

 

Error Corrections

ISM Rebar import from Ram Concept– Previously, in certain circumstances US bar sizes were transferred into Revit incorrectly and defaulted to bar size #1. The correct bar size is now assigned (766177).

Concentrated Surface Rebars – Concentrated Surface rebars with rebar count of one were updated to rebar count of 2. Solution involves filtering for these type of ISM objects on import, as Revit’s Path Reinforcement object require a minimum of 2 bars (818408).

Import Crashing Revit - Certain rare invalid arrangement of loads and surface elements would cause import to crash (722006, 721355).

Studs imported from Ram Structural System – Studs imported from Ram Structural System would have its stud count shown separated with semicolons rather than commas (563440).

 

About ISM Revit Plugin

The ISM Revit Plugin enables a round trip exchange between Revit® and Bentley’s Integrated Structural Modeling (ISM) format, therefore also enabling a round trip exchange between Revit and any other ISM-enabled application. RAM Structural System, RAM Concept, and STAAD.Pro are examples of applications that are ISM-enabled and can interoperate with Revit with the help of the ISM Revit Plugin.

The ISM Revit Plugin adds commands to Revit that allow ISM repositories to be created and updated from Revit, and allow Revit to create and update ISM repositories. The ISM Revit Plugin is dependent on ISM and thus Structural Synchronizer must be installed on the computer.

Tags: RAM Structural System, RAM Concept, ISM Revit plug-in, RAM, structural synchronizer, ISM

Modeling Continuous Foundations

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Revision 7 posted to RAM | STAAD Wiki by Seth Guthrie on 3/13/2018 3:24:36 PM
  
 Applies To 
  
 Product(s):RAM Structural System
 Version(s):10.0 and later
 Area: Modeling
 Original Author:Bentley Technical Support Group
  

How can I model continuous foundations?

In RAM Structural System, a continuous foundation can be modeled under walls or columns. Like all foundations, start on the lowest framed level, it is not required to make a separate foundation level in the program. On that level place the foundation using Layout - Foundation - Continuous - Add.

When placing a continuous foundation the user must start and end the foundation at a column or wall end point. If other columns along the foundation are slightly off the center line they can still be considered in the foundation design so long as they fall within the set tolerance.

One problem is when there are too many snaps turned on. When placing continuous foundation, we suggest turning off all snap modes except columns and walls to prevent accidentally snapping to other items on the layout. 

Another problem has to do with walls that are segmented or step down. The program is limited to designing continuous foundations that start where a line of walls starts and end where the line of walls ends. The user cannot place a foundation under part of the length of a wall, even if the wall is segmented. 

Note, the Modeler - Datacheck will give a warning if nothing at all is modeled below the wall (wall 5 above) but this warning can be ignored. The analysis in Ram Frame (or Ram Concrete) will correctly assume a point of support under the wall regardless. You can confirm the vertical reactions under the wall in those modules. 

See Also

RAM SS - Foundation [FAQ]

Tags: footing, RAM Structural System, Modeling, RAM Foundation, Continuous Foundation, SELECTsupport

RAM Frame P-Delta [TN]

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Current Revision posted to RAM | STAAD Wiki by Seth Guthrie on 3/14/2018 8:45:28 PM
 Product(s):RAM Structural System; Ram Frame
 Version(s):Any
 Area: Analysis; Design

P-Delta in RAM Frame

General

A general second-order elastic analysis requires consideration of effects caused by displacements between brace points (P-delta) and effects caused by displacements of brace points (P-Delta). Ram Frame uses a geometric stiffness method to approximate P-Delta effects. P-Delta can be turned on/off in Ram Frame – Criteria – General. This method does not capture P-delta effects in the analysis. P-delta effects can be accounted for in the steel post processor by using the B1 factor in the AISC 360 codes. Refer to section 6.13 in the Ram Frame Analysis documentation for more information on P-Delta.

 
Geometric Stiffness Method

The geometric stiffness method implemented in Ram Frame is a non-iterative approach. A single modification to the stiffness matrix is made and applied to all load cases. This is advantageous over approaches that use an iterative non-linear solution, because it reduces analysis time and can be used with dynamic load cases that require modal combination of results.

The program calculates a global stiffness matrix (assembled from each finite element). Then, based on diaphragm masses or gravity loads, it calculates a global geometric stiffness matrix, which is subtracted from the global stiffness matrix. The global stiffness matrix becomes less stiff, which increases calculated displacements when considering P-Delta effects. All of these computations take place at the global level and not at any individual element level. Based on computed displacements, the program calculates member forces using the individual element stiffness matrices. Since these matrices are not modified, the member forces are larger when P-Delta is considered. Base shears are calculated based on member forces. Hence, we see a difference between the sum of the applied loads and sum of the base shear when P-Delta is considered. In a theoretical exact approach, the total shear reaction would match the applied load.


Scale Factor

P-Delta effects in Ram Frame are a function of the mass or gravity loads on the diaphragm and the stiffness of the members attached to the diaphragm. Codes generally require that second order effects be calculated for load combinations. Ram Frame analyzes load cases and superimposes the results for load combinations. Therefore, it is necessary to enter an appropriate scale factor so that superposition of the load cases produces the proper load combination results with P-Delta. The scale factor should represent the average factor on the gravity load cases in the controlling load combination. Since this may vary or each member, enter a conservative scale factor that covers all load combinations. When the gravity load option is used in Ram Frame, this is fairly straight forward because you can enter separate factors for dead load and live load. If the mass option is used, the scale factor must also consider the magnitude of the mass that is modeled relative to the gravity loads. For example, assume the modeled mass is 20% higher than the dead load and the live load is about 50% of the dead load. If the appropriate scale for mass is based on the load combination factors 1.2DL and 1.6LL, then the scale factor for mass is (1.2 + 0.5 * 1.6) / 1.2 = 1.67.

Generally the most preferred option is the Use Gravity Loads option. The scale factors should be those associated with the load combination most likely to govern for the lateral columns. For example, since the seismic or wind loads are likely to control the designs, the strength design combinations 4 or 5 of ASCE 7 Section 2.3.2 are likely to control. In those combinations, the factor on Dead Load is 1.2 and the factor on Live Load is either 0.5 or 1.0, as specified by Exception 1. Conservatively, the factors of 1.2 and 1.6 per combination 2 could be used, guaranteeing that the worst P-Delta condition is covered for all combinations. Note that these should be ultimate factors even if ASD will be used in design of the members so that the P-Delta analysis will be performed at an ultimate level, which is necessary for the principle of superposition of load cases to be valid. Also, note that these are not the factors that will be used in the load combinations for design, these are merely the factors used to calculate the ultimate gravity loads used in the P-Delta analysis method.


Limitations

The geometric stiffness method is only utilized with diaphragms are rigid or semirigid. If diaphragms are flexible or pseudo-flexible, the AISC 360-05 code in the steel post processor has an option to include the B2 factor. This moment magnification factor is conceptually the same thing as using P-Delta in the analysis.

The Eigen solution can be very sensitive to P-Delta. The Eigen solution is required for any dynamic load case and static load cases that use calculated periods/frequencies. If you are encountering an instability running a dynamic load case with P-Delta, first run the analysis without P-Delta to make sure the displacements are reasonable. If the displacements look fine, try creating an Eigen solution load case to reduce the number of modes the program is using. If you are encountering an instability running a static wind or seismic case, consider explicitly defining the periods/frequencies to avoid the Eigen solution. The Eigenvalue Error technote explains further.

Some building configurations are problematic for the geometric stiffness method implemented in Ram Frame. In particular, models with many disconnected nodes, short story heights, and offset diaphragms (e.g. mezzanines and low roofs) can be problematic. Generally, the limiting factor is a particular diaphragm and the problem presents itself as an RZ instability. If you encounter this error, run the model without P Delta and review the displacements. If the displacements are reasonable and the Eigen solution is not causing the issue, then you are experiencing a limitation with P-Delta. If you must run P-Delta in the analysis, your only option is to combine the mass on the problem diaphragm with another diaphragm in Ram Frame – Loads - Masses. However, this will impact any dynamic analysis and the distribution of static seismic loads.

Knee braces can produce unconservative P-Delta effects. Nodes are defined where the braces meet the columns necessitating the evaluation of lateral stiffness coefficients at a plane containing all such nodes. Since there is no diaphragm at this level, there will not be any floor lateral stiffness to be corrected.

See Also

AISC 360 Direct Analysis Method in RAM Structural System

RAMSS Eigenvalue Error

RAM Instability In Finite Element Analysis

Tags: analysis, design, SELECTservices, P-delta, RAM Frame, Criteria, RAM Structural System, TechNote, Support Solutions

RAM Frame - Center of Rigidity

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Current Revision posted to RAM | STAAD Wiki by Seth Guthrie on 3/14/2018 8:49:55 PM
 Product(s):RAM Structural System
 Version(s):Any
 Area: Analysis; Reports

Center of Rigidity

In order to review the center of rigidity for a structure, a special Centers of Rigidity load case must be created under Loads – Load cases in RAM Frame. Once the analysis of that load case has been performed, a “Centers of Rigidity” report becomes available under the reports menu.

The Centers of Rigidity report lists the centers of rigidity of each rigid or semi-rigid diaphragm at each of the levels that contain lateral members. 

Center of Rigidity (CR) values reported are only used for load cases that require explicit calculation of CRs for use in calculation of load eccentricities (for example, ASCE 7-05 Wind Load Case). This information is never used directly for analysis. On the other hand, it should be noted that analysis results always includes any torsional effects due to having center of rigidity and applied force resultant at different locations. In other words, the analysis always accounts for locations and stiffnesses of
frame members and diaphragms. Hence, any torsional effects of the force being offset from the center are implicitly and correctly accounted in the analysis. The center of rigidity can be thought of as the location through which a lateral load would cause lateral deformation of the diaphragm (possibly at an angle) without causing rotation. The concept is analogous to that of a cross section’s “shear center”.

The report also lists the "Centers of Mass", and for rigid diaphragms specifically, it includes the "Story Lateral Stiffness" of each diaphragm. The reported story stiffness is the inverse of the interstory drift that is calculated according to a unit load applied at the story.

Below are the results for a 30’x10’ structure, 10 stories tall, with walls on 3 sides. The walls here intersect to create a "C" shape, but individual wall out-of-plane stiffness is ignored and the diaphragms are rigid. 

 

Isometric view of “C” shaped wall model, center of mass at (15,5)

For buildings with torsional irregularity, the lateral load may always be on the same side of the center of rigidity even after considering a 5% accidental eccentricity of the load. In this case, the torsion will always be “adding” to the shear on one side of the building and “subtracting” shear from the other side. To ignore these effects, an additional lateral load case with the same magnitude as the generated load, but with a location exactly at the center of rigidity can be added. This pure shear load case, can then be included in the load combos to yield a conservative design for the frame elements that otherwise would benefit from the eccentricity. Some codes may require such a conservative approach, but most building codes recognize the reality of the eccentricity and the effect it has on the structure. In those cases, the code may simply want an increase in the accidental torsion to be considered. This can be changed under Loads – Masses, within the Analysis mode of RAM Frame.

Returning to the example above, an interesting phenomenon occurs in regard to the “Yr” location. Even though the levels are identical, the center of rigidity shifts from level to level because the flexibility of the supporting structure keeps increasing. The higher the level, the more eccentric the center of rigidity. In other words, at the top a lateral load must be applied farther from the middle in order to bend the channel without twisting it.

A load applied to the diaphragm in line with the long wall (y=10’), actually produces a large diaphragm rotation. For a load applied to the center of the diaphragm (y=5’) the effect is even worse

 

Channel Loaded Through Center of Rigidity

Channel Loaded Through Long Wall

It is worth noting that a structure like this with a high degree of eccentricity may also experience a significant shift in the center of rigidity location when using P-Delta analysis. For that reason, when closely evaluating the center of rigidity we recommend a first order analysis.

Why is more than one center of rigidity shown on a level?

The program calculates and reports a center of rigidity for each diaphragm on every level. The plotted center of rigidity values using Process - Results - Center of Rigidity are only for rigid diaphragms.

Why can't I plot the center of rigidity?

First a Center of Rigidity load case must be created and analyzed in order to plot the location using Process - Results - Center of Rigidity.

Furthermore, this graphical result is only provided for rigid diaphragms.

See Also

RAM SS Walls FAQ

RAM Frame P-Delta [TN]

RAM Frame - Seismic Loads [FAQ]

Tags: analysis, RAM Frame, RAM Structural System, Center of Rigidity, Support Solutions, mass
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