Abstract
Incorporating Soil Structure Interaction (SSI) effects can have a significant influence on responses. The aim of the present study is to estimate structural response. The ground motion imposed on the SSI system is selected in such a way related characteristics are matched with underlying soil. One hundred and thirteen Steel Moment Resisting Frames (SMRFs) are selected and concept of Beam on Nonlinear Winkler Foundation (BNWF) model is conducted. The responses of these structures are calculated under Non-linear Response History Analysis (NL-RHA) based on five types of soil and are compared with fixed-base ones. Observed that considering SSI effects leads to significant reduction in responses especially in structures constructed on soft soil. Finally, by using nonlinear regression analysis, a formula is introduced to estimate maximum and residual inter-storey drift ratio reduction factor, which is used to convert results of a structure with fixed condition to a structure with SSI effects.
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