I am new in Staad pro so please answer this question in very easy language....!
What is the use of Foundation support i staad pro....
can we use this instead of fixed support...
what is logic behind that support....
Foundation Support in STAAD represents the soil structure interaction of practical field in support. Through FOUNDATION SUPPORT option you can provide isolated footing, mat footing inputs with linear and multi-linear springs. You can also provide plate mat or elastic mat option depending on the structure. You can use these supports in your structure but it requires some more input like subgrade modulus of elasticity. You may find more detailed information in technical manual and in the attached link also.
https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/29301/difference-between-elastic-mat-and-plate-mat
file:///C:/Program%20Files/Bentley/Engineering/STAAD.Pro%20CONNECT%20Edition/Help/GUID-6474FE8A-C1AD-4D68-8C42-D54F88AED253.html?q=foundation&q=foundation