This document describes new or enhanced features of STAAD Foundation Advanced (SFA) since the CONNECT Edition V9.4 (Release 9.4.0.20).
Mat foundations per the 2018 edition of the Australian code AS3600
The salient features of this module are:
User imports a superstructure model from STAAD.Pro. This brings in the support reactions and column/pedestal data from that model into SFA
or
Starts with a blank model in SFA, defines the locations of column supports (if any) and assigns the column sizes and loads acting on the foundation through those columns
Creates a mat foundation job and chooses the code as Australian (AS3600-2018). Select the load combinations (categorized into Service and Ultimate) for which the mat should be analyzed and designed.
User specifies any additional loads on the mat if any - point loads, area loads, etc. Generates load combinations if needed. (Load combinations from the SS model can also be imported thru Step 1)
Defines the mat boundary and meshes it to produce a finite element model of the mat. Specifies the mat thickness to be used for analysis as well as for design.
Specifies soil supports and/or pile spring supports.
Performs the FE analysis of the mat.
Creates a moment envelope which is a set of discrete points where the concrete design of the mat will be performed.
Performs the flexure and punching shear checks. The program will recommend a bar arrangement for flexure for the longitudinal and transverse directions for the top and bottom surfaces. In the event of insufficient thickness as a singly-reinforced section, a failure will be shown.
Performs moment capacity checks for a desired bar diameter and spacing.
Output from the program consists of
a) Summary of minimum/maximum nodal displacements from the FE model
b) Summary of minimum/maximum plate element stresses and moments from the FE model
c) Summary of maximum soil pressures from the various service load cases/combinations.
d) Contact Area report for each service load case/combination. A loss of contact will be evident through a value that is less than 100%
e) Report of Sliding and overturning check for each service load case/combination.
f) Static equilibrium mismatch report in the event of instabilities that cause overturning or sliding.
g) Pile reaction summary for service and ultimate load cases/combinations.
h) Details of the flexure desigh checks for the lontgitudinal and transverse directions for top and bottom surfaces.
Details of the implementation are described in the Technical Reference manual.