Design Comparisons Between Sap2000 and Safe
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Transcript of Design Comparisons Between Sap2000 and Safe
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DESIGN COMPARISONS
FOR CASE STUDIES USING
SAP2000
SAFE NODAL METHOD
AND SAFE INTERNAL METHOD (WOOD -ARMER)
FOR THIN AND THICK PLATES
Jan. 2008
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TABLE OF CONTENTS
I REPORT SCOPE .................................................................................................................... 2
II THICK PLATE EXAMPLE ................................................................................................. 3
II -1- MODEL DESCRIPTION ................................................................................................... 3
II -2- MOMENTS IN X DIRECTION ......................................................................................... 4
II -3- MOMENTS IN Y DIRECTION ....................................................................................... 12
III THIN PLATE EXAMPLE ................................................................................................. 20
III -1- MODEL DESCRIPTION ................................................................................................ 20
III -2- MOMENTS IN X DIRECTION ..................................................................................... 21
III -3- MOMENTS IN Y DIRECTION ..................................................................................... 26
IV CONCLUSION ................................................................................................................... 30
APPENDIX A .............................................................................................................................. 31
APPENDIX B ............................................................................................................................... 32
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I REPORT SCOPE
We have been lately notifying unjustified reinforcement when using SAFE models for raft
foundations supported on soil. This situation was mainly detected in case of irregular geometry
of models, unsymmetrical grids of columns, shear walls near the edge of the raft,
The above CSI Technical Support and we were
advised to use the internal method (Wood-Armer) along with thick plate analysis in case of point
loads (Raf refer to Appendix B).
In what follows, two shell examples (raft foundation and suspended slab) will be the subject of a
study to compare between the analysis made by SAP2000 and the analysis made by SAFE using
both the nodal method and the internal method (Wood-Armer). The results of this study will be
adopted as a base for all horizontal shell designs.
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II THICK PLATE EXAMPLE
II -1- MODEL DESCRIPTION
For this example, a raft foundation on soil, supporting two corewalls near the edge and
rectangular grids of walls and columns, was modeled as a thick plate on SAP2000 and on SAFE
V8.0.8.
Fig. 1: Raft Model Geometry on SAFE