ASDShells vs SAP2000
Posted: Wed Feb 11, 2026 11:42 pm
I'm wondering if anyone can describe the differences between the ASDShell elements and that used in SAP2000.
I've done some testing to try and determine the cause of the difference in results between that given by SAP2000. As far as I can tell the membrane behaviour is an exact match to that in SAP, however, the plate behaviour seems to differ (I believe the drilling dof also differs). Generally, any loading that results in plate behaviour differs from SAP.
If anyone is able to shed some light on what the differences could be that would be much appreciated.
In-plane comparison
Out-of-plane comparison
I've done some testing to try and determine the cause of the difference in results between that given by SAP2000. As far as I can tell the membrane behaviour is an exact match to that in SAP, however, the plate behaviour seems to differ (I believe the drilling dof also differs). Generally, any loading that results in plate behaviour differs from SAP.
If anyone is able to shed some light on what the differences could be that would be much appreciated.
In-plane comparison
- inplane.png (42.82 KiB) Viewed 185 times
- outofplane.png (46.42 KiB) Viewed 185 times