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I am trying to investigate the effects of soil structure interaction on the rigidity of multi-storey RCC framed structures and other parameters (under the action of earthquake loading.) In order to accomplish that i am using sap 2000 for the modelling. what i need to do i have to model soil support as (uni directional as well as three dimensional) : liner elastic Non-linear elastic Elasto-plastic i am little bit confident with first two that i can do something (still suggestions and comments would be appreciate) but i am struggling to model the behaviour of Elasto-plastic soil. is there anyone have experience of modelling that in sap 2000? even any literature that could be helpful for the modelling would be appreciate. One more thing for the analysis purposes i am using linear static analysis approach as it is widely using by engineers throughout the world. (how far my assumption is correct: i need your valuable comments) thanks and my best regards

All, It is a must have and must read. Please go through the attachment. Thanks. Soil Structure Interaction For Building Structures.pdf