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Can we design shear wall/wall with single layer (mesh) of reinforcement?

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Current Revision posted to RAM | STAAD Wiki by Shreyanka Bhattacharjee on 5/2/2022 5:08:23 AM

  
 Applies To 
  
 Product(s):STAAD Advanced Concrete Design
 Version(s):All
 Environment: N/A
 Area: Concrete Design
 Subarea: Column & Shear Wall
 Original Author:Shreyanka Bhattacharjee
Bentley Technical Support Group
  

Can we design shear wall/wall with single layer (mesh) of reinforcement?

No. Shear wall design with single mesh is not available as it is designed for the axial force and biaxial moments.

Tags: single layer, shear wall design, RCDC

RCDC uses the formula of column for the “Minimum Eccentricity Calculation” (in IS code), though it is different for shear walls as per Clause: 32.2.2 of IS 456-2000

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Current Revision posted to RAM | STAAD Wiki by Shreyanka Bhattacharjee on 5/2/2022 5:13:27 AM

  
 Applies To 
  
 Product(s):STAAD Advanced Concrete Design
 Version(s):All
 Environment: N/A
 Area: Concrete Design
 Subarea: Column & Shear Wall
 Original Author:Shreyanka Bhattacharjee
Bentley Technical Support Group
  

RCDC uses the formula of column for the “Minimum Eccentricity Calculation” (in IS code), though it is different for shear walls as per Clause: 32.2.2 of IS 456-2000

Clause 32.2 in IS 456-2000, is for Empirical Design Method of walls. Clause 32.3 is for design of walls subjected to horizontal and vertical loads and same has been followed in design of wall in RCDC.

Tags: shear wall design, Minimum Eccentricity Calculation, RCDC, IS 456

Please clarify the braced and un-braced design conditions

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Current Revision posted to RAM | STAAD Wiki by Shreyanka Bhattacharjee on 5/2/2022 5:20:31 AM

  
 Applies To 
  
 Product(s):STAAD Advanced Concrete Design
 Version(s):All
 Environment: N/A
 Area: Concrete Design
 Subarea: Column & Shear Wall
 Original Author:Shreyanka Bhattacharjee
Bentley Technical Support Group
  

Please clarify the braced and un-braced design conditions

These are design principles chosen by structural engineer for design of buildings. These are beyond purview of RCDC. RCDC captures this as information for further calculations.

As per clause 39.7.1 (Notes), IS code allows user to design column based on Braced and Un-braced conditions. The end moments are calculated based on end conditions given in this clause.

In Euro code, the braced and Unbraced option is available for calculation of effective length factor.

Tags: Braced and un-braced design conditions, shear wall design, RCDC, Euro code, IS 456

Lateral ties diameter, spacing & no. of columns main bars are correlated by formula given in IS13920 for rectangular and circular column.Can any single parameter be provided to calculate remaining two parameters in RCDC,once the initial design is compl

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Current Revision posted to RAM | STAAD Wiki by Shreyanka Bhattacharjee on 5/2/2022 5:28:09 AM

  
 Applies To 
  
 Product(s):STAAD Advanced Concrete Design
 Version(s):All
 Environment: N/A
 Area: Concrete Design
 Subarea: Column & Shear Wall
 Original Author:Shreyanka Bhattacharjee
Bentley Technical Support Group
  

Lateral ties diameter, spacing & no. of columns main bars are correlated by formula given in IS: 13920 for rectangular and circular column. Can any single parameter be provided to calculate remaining two parameters in RCDC, once the initial design is complete?

Yes. RCDC can design any shape of column like L, T, I, E, Capsule and polygons up to 12 edges. It also has an option to create user defined sections. For more information refer Topic “Irregular Shaped Column” for column from help Content.

Tags: IS13920 2016, shear wall design, RCDC, Irregular Shaped Column

Lateral ties diameter, spacing & no. of columns main bars are correlated by formula given in IS13920 for rectangular and circular column. Can any single parameter be provided to calculate remaining two parameters in RCDC,once the initial design is comp

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Current Revision posted to RAM | STAAD Wiki by Shreyanka Bhattacharjee on 5/2/2022 5:31:05 AM

  
 Applies To 
  
 Product(s):STAAD Advanced Concrete Design
 Version(s):All
 Environment: N/A
 Area: Concrete Design
 Subarea: Column & Shear Wall
 Original Author:Shreyanka Bhattacharjee
Bentley Technical Support Group
  

Lateral ties diameter, spacing & no. of columns main bars are correlated by formula given in IS: 13920 for rectangular and circular column. Can any single parameter be provided to calculate remaining two parameters in RCDC, once the initial design is complete?

Yes. After initial design is completed, user can change the numbers and diameter of main reinforcement in redesign option. Diameter and spacing of links can be changed. For any parameter changed in redesign process, RCDC would design/ check the column with all relevant clauses. For more information refer “Edit Local Column Design” from help Content.

.

Tags: shear wall design, RCDC

Lateral ties diameter, spacing & no of columns main bars are correlated by formula given in IS13920 for rectangular and circular column. Can any single parameter be provided to calculate remaining two parameters in RCDC, once the initial design is comp

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Current Revision posted to RAM | STAAD Wiki by Shreyanka Bhattacharjee on 5/2/2022 5:33:14 AM

  
 Applies To 
  
 Product(s):STAAD Advanced Concrete Design
 Version(s):All
 Environment: N/A
 Area: Concrete Design
 Subarea: Column & Shear Wall
 Original Author:Shreyanka Bhattacharjee
Bentley Technical Support Group
  

Lateral ties diameter, spacing & no. of columns main bars are correlated by formula given in IS: 13920 for rectangular and circular column. Can any single parameter be provided to calculate remaining two parameters in RCDC, once the initial design is complete?

Yes. After initial design is completed, user can change the numbers and diameter of main reinforcement in redesign option. Diameter and spacing of links can be changed. For any parameter changed in redesign process, RCDC would design/ check the column with all relevant clauses. For more information refer “Edit Local Column Design” from help Content.

Tags: shear wall design, RCDC

Explanation of live load reduction as per Table-10 of IS 1893-2016 in RCDC.

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Current Revision posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 10:37:04 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

    Explain how the Live load reduction as per Table-10 of IS 1893-2016 is handled in RCDC. And how live load reduction available in RCDC works for this?

  • IS 1893-2016 – Table-10 is for percentage of Imposed Load to be considered in calculation of seismic weight. Refer below snap,

     

    The lump mass for the earthquake load is calculated based on the % of vertical load. It is assumed in the code that during earthquake live load intensity would not be full. Thus, for the calculation of seismic weight, we can reduce the live load. The dead load is considered 100%. The live load is considered as per table above. It is related to lateral loads.

    Please note that this reduction is only to calculate seismic weight which we considered for lateral load calculation for earthquake load conditions. It is not related to vertical live load on column and beam.

    It must handle in analysis part as it will govern the load to be applied laterally for earthquake.

     Please note that, it is not applicable for Wind loads, as these loads are not depending on the Building weight.

     The live load reduction given in Is 875, is for the vertical load. The reduction is applied floor wise as per the number of stories supported by column and footing. Please note that, it is not applied for beam and slab design.

     The intention of the code here is at a time, building would not be occupied by full live load for exposed area. Thus, we can take advantage of partially occupied area. Thus, the Live load reduction is as per no of stories supported by column and foundation and it is maximum 50%.

    For calculation of seismic weight 'full live load' need not be considered. For design of elements, the effect of this EQ (in member) is considered with appropriate load factor of the combination. With regards to the combination of DL+LL+EQ, one can consider the reduced LL as explained. (based on the number of levels supported).

Tags: RCDC

RCDC unable to read load combinations if added in analysis file .

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Current Revision posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 10:42:06 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

RCDC unable to read load combinations if added in analysis file as explained below:

                           I usually use load cases for basic loads like dead, live, wind (number 1, 2, 3, etc.). Then, I use another set of load cases where I use REPEAT and NOTIONAL for gravity loads only                                       (load number 200, 201, 203, etc.). Finally I use traditional LOAD COMBINATIONS where I call repeated loads (for gravity) and basic loads (for wind and seismic).

                          There are two basic load cases exists with two repeat load cases. Two regular combinations exist which consist of repeat load cases. Presently RCDC reads Basic load cases and repeat load                                        cases. As in any combination, dead load is must and same validation is provided in RCDC, I have assigned both the basic load cases as dead load in RCDC.

                          RCDC does not identified the Regular load combinations from analysis file when it is consisting of repeat load cases. if any regular combination is consisting of basic load case + repeat load case,                                  it would be difficult to identify the type of load from repeat load cases. Adding linear load case and Non-linear load comb (repeat) in to one regular combination is not recommended and not                                            handled in RCDC.

Tags: STAAD.Pro, RCDC

Ductile detailing of beams columns without increasing cross section.

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Current Revision posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 10:44:40 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

Beam and column design fails in ductile detailing but is ok in non-ductile in RCDC? Why ? And how do I get ductile detailing of beams columns without increasing cross section?

In ductile beam design - generally beams are failed due to sway shear. it is only applicable to Ductile beam only. The sway calculation is based on provided reinforcement in beam. if the sway shear is high and section is failed due to shear, there is only option to increase concrete grade OR section size. for column design - generally column fails in Joint check. it is also depending on the provided reinforcement in beam and column. if any column failed in joint check, it can be pass with increasing concrete grade OR column size. you cannot compare design of Non ductile beam and column with Ductile beam and columns. Please go through the design and detailing clauses of ductile code for more information.

Tags: STAAD.Pro, RCDC

Shear calculations in column, beam, footing the Maximum stress in reinforcement is limited to 415 N/sqmm.

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Revision 1 posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 10:48:35 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

I noticed that RCDC have calculated the stirrup using Fe415 even if the steel grade chosen for design is Fe500. The longitudinal rebars of course is designed using the specified grade, i.e., Fe500. Is this intentional since IS456 restricts the maximum grade for stirrup at 415N/mm2? Also, is the same true in the case of design for special confining lateral ties since IS code is somewhat silent on this if I’m not mistaken

Answer : For Shear calculations in column, beam, footing  the Maximum stress in reinforcement is limited to 415 N/sqmm. Please refer below snap from IS 456,

                         

The shear failure is a sudden failure thus for the shear calculations, IS code have restricted the stress to 415 N/sqmm for higher reinforcement grade.

For calculation of Special confining links, actual reinforcement grade is considered. if Fe-500 is used in the design, the special confining links are calculated based on 500N/sqmm stress. the guidelines are given in IS 13920-2016 for use if higher grade reinforcement. refer below snap from IS 13920-2016

                               

Tags: STAAD.Pro, RCDC

RCDC-General

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Revision 49 posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 10:48:54 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Bentley Technical Support Group

  1. [[Importing gridlines from AutoCAD.]]
  2. [[Can all design calculation reports exported in Excel format?]]
  3. [[Settings to freeze drawing style.]]
  4. [[Unable to read analysis data]]
  5. [[Load Combinations considered for regular and irregular buildings]]
  6. [[Data exported from Etabs in FPS(foot-pound-second) reflects in RCDC as MKS(meter-kilogram-second).]]
  7. [[Is the Vertical axis of STAAD and RCDC Same.]]
  8. [[How to change safety factor for design codes in RCDC?]]
  9. [[Defining concrete grade as 27 N/sqmm in RCDC for IS code design.]]
  10. [[To design a building for repeat load cases from STAAD in RCDC.]]
  11. [[Explanation of live load reduction as per Table-10 of IS 1893-2016 in RCDC.]]
  12. [[RCDC unable to read load combinations if added in analysis file .]]
  13. [[Ductile detailing of beams columns without increasing cross section.]]
  14. [[Shear calculations in column, beam, footing  the Maximum stress in reinforcement is limited to 415 N/sqmm.]]

14. RCDC create "Text Schedule" with unrecognizable characters. Kindly suggest to get the text schedule in English Language

                                

Answer: The issue might be because of language set in the system. please refer below snap to set language,


15.RCDC is not able to read STAAD file and closes.

We have got RCDC connect edition V9 update 3 - 9.3.0.25 and STAAD pro connect edition V22 Update 4 -22.4.0.40. Since, yesterday RCDC is not able to read STAAD file and closes on its own. Kindly help us find a solution to this issue

Ans:

There are overlapping members exists in STAAD file. refer below snap,

Please remove these overlapping members and try to read in RCDC. if you read footing in RCDC, it doesn't show any error. it has identified two members at same location. it will design two footing at same location for members and forces available from analysis. Refer below snap,

please remove these overlapping members as it is not expected to model overlapping members.

16.Unable to import the Etabs 2019 Model?

The Microsoft Database File (mdb or accdb) created from ETABS 2019 has a few changes in the table format as compared to ETABS 2018.
Currently RCDC is not reading the data from the modified table format of accdb file created from ETABS 2019. created from EtABS 2019. 
There is change in the table for in the 'Wall Object Connectivity' table in the mdb (accdb) file as follows. By making a small modification in "Wall Object Connectivity table", the mdb file will be successfully imported in RCDC. 
For easily modifying the data, one can copy the data in excel, make changes over in the excel itself and paste the data back to mdb.
 
Once the data from "Wall Object Connectivity" is copied to excel below formula can be used to compile all the 4 unique points mentioned in 4 separate columns under one single column as per requirement of RCDC to import mdb from ETABS 2019.
     
   

18. How to set style manager settings in RCDC?

This link provide a video demonstrating the steps. In the latest version of RCDC (Version 11 onwards) this option can be found in the landing page as shown below.

19. How to set additional grid lines in RCDC?

RCDC automatically detects all the grids along column lines when we import the analysis model. But, after that if we need some additional grids, we can add them easily. To add new grids we should go to Modify > Grid Lines and right click on the new window to add grids at different locations.

                                 

We can easily add, delete or hide/unhide grids from this settings. It has also an option to include inclined grid using the inclined option.

20. RCDC designs different elements in different modules like Beam, column, slab etc. We need to provide same member number, sizes, grids, group names across all the modules to represent uniformity in the output. How to import same grid data,  column/beam marking and sizes in all design modules in RCDC for a structure?

RCDC provides  an easy option to import data in a module from different other modules. You can go to File and there you will find some options to import data depending on modules. An example for slab is shown below. For slab module we can import beam and column data.

For other modules also we will get similar options to import.

Tags: E-tabs, footing, shear wall not detected, Column, RCDC, beam, Staad File, Load Cases, RCDC Queries, pile cap

RCDC create "Text Schedule" with unrecognizable characters.

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Current Revision posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 10:55:43 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

 RCDC create "Text Schedule" with unrecognizable characters. Kindly suggest to get the text schedule in English Language

                                 

Answer: The issue might be because of language set in the system. please refer below snap to set language,

Tags: STAAD.Pro, RCDC

Unable to read Staad files as RCDC closes on its own.

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Current Revision posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 11:01:11 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

  

RCDC is not able to read STAAD file and closes. We have got RCDC connect edition V9 update 3 - 9.3.0.25 and STAAD pro connect edition V22 Update 4 -22.4.0.40. Since, yesterday RCDC is not able to read STAAD file and closes on its own. Kindly help us find a solution to this issue.

                      There are overlapping members exists in STAAD file. refer below snap,

Please remove these overlapping members and try to read in RCDC. if you read footing in RCDC, it doesn't show any error. it has identified two members at same location. it will design two footing at same location for members and forces available from analysis. Refer below snap,

please remove these overlapping members as it is not expected to model overlapping members.

Tags: design, STAAD.Pro, RCDC Queries

Unable to import the Etabs 2019 Model.

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Current Revision posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 11:04:28 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

Unable to import the Etabs 2019 Model?

The Microsoft Database File (mdb or accdb) created from ETABS 2019 has a few changes in the table format as compared to ETABS 2018.Currently RCDC is not reading the data from the modified table format of accdb file created from ETABS 2019. created from Etabs 2019. 

There is change in the table for in the 'Wall Object Connectivity' table in the mdb (accdb) file as follows. By making a small modification in "Wall Object Connectivity table", the mdb file will be successfully imported in RCDC. For easily modifying the data, one can copy the data in excel, make changes over in the excel itself and paste the data back to mdb.

 
Once the data from "Wall Object Connectivity" is copied to excel below formula can be used to compile all the 4 unique points mentioned in 4 separate columns under one single column as per requirement of RCDC to import mdb from ETABS 2019.

Tags: STAAD.Pro, RCDC, ETABS

Style Manager setting in RCDC .

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Current Revision posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 11:11:58 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

How to set style manager settings in RCDC.

This link provide a video demonstrating the steps. In the latest version of RCDC (Version 11 onwards) this option can be found in the landing page as shown below.

Tags: design, RCDC

Steps to add new grid lines in RCDC.

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Current Revision posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 11:17:23 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

How to set additional grid lines in RCDC?

RCDC automatically detects all the grids along column lines when we import the analysis model. But, after that if we need some additional grids, we can add them easily. To add new grids we should go to

Modify > Grid Lines and right click on the new window to add grids at different locations;

                                 

We can easily add, delete or hide/unhide grids from this settings. It has also an option to include inclined grid using the inclined option.

Tags: design, RCDC

Importing same grid data, column/beam marking and sizes in all design modules in RCDC for a structure.

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Current Revision posted to RAM | STAAD Wiki by Ranjana Shinde on 5/2/2022 11:24:47 AM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area:Concrete Design
Subarea:General
Original Author:Ranjana, Bentley Technical Support Group

RCDC designs different elements in different modules like Beam, column, slab etc. We need to provide same member number, sizes, grids, group names across all the modules to represent uniformity in the output. How to import same grid data,  column/beam marking and sizes in all design modules in RCDC for a structure?

RCDC provides  an easy option to import data in a module from different other modules. You can go to File and there you will find some options to import data depending on modules. An example for slab is shown below. For slab module we can import beam and column data.

For other modules also we will get similar options to import.

Tags: Grid, RCDC Design, RCDC

Unable to Import the Wall elements from ETABS 2019 / ETABS 2020 MDB Files

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Current Revision posted to RAM | STAAD Wiki by Abhisek M on 5/2/2022 1:31:01 PM

A wall when modeled, has 4 corner points, 2 of which will lie at a particular level X and the another 2 will lie at a level which is below the level X.

Now when this data is presented in MDB under the ‘Wall Bays’ table, a wall will have

  1. PointNumber = 4 and
  2. PointBay = 2 (each one will lie at a level considered and another at level below the considered level)
  3. PointStory = Referencing as Same and Below.

 

Below is the snip for more clarification –

So, a wall will always have 2 of its points at considered level and the other 2 at the below level.

 

When MDB is created from ETABS, sometimes while exporting the data, ETABS shows that all 4 points lie on the SAME level which is not the expected case.

 

In such a situation, it is required to modify the data in the MDB created itself as below.

In the Wall bays table, find out all those walls which has all the 4 points lying on same level and change the PointStory as ‘Below’ for the 1st, 2nd point; and the 3rd, 4th point will lie on the same PointStory Level.

Tags: RCDC, ETABS, staad rcdc

Solution for Issues Related to Etabs-RCDC Workflow

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Current Revision posted to RAM | STAAD Wiki by Abhisek M on 5/2/2022 1:37:33 PM

Applies To
Product(s):STAAD Advanced Concrete Design
Version(s):Connect Edition
Environment:
Area: Concrete Design
Subarea:
Original Author:Abhisek Mandal, Bentley Technical Support Group

  1. [[Story forces and Story drifts data are missing when importing .accdb file into RCDC]]
  2. [[General reading type of error in RCDC .]]
  3. [[Unable to Import the Wall elements from ETABS 2019 / ETABS 2020 MDB Files]]

Tags: import, STAAD.Pro CONNECT Edition, RCDC, ETABS, Interoperability

RAM Concept Release Notes

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