Soil Structure Interaction Effect on High Rise and Low Rise Buildings

Abstract

Effect of supporting soil on the response of structure has been analyzed in the present study. A low rise (G+ 5 storey) and a high rise (G+12 storey) building has been taken for the analysis. For both type of buildings, the response of building with and without consideration of soil structure interaction effect has been compared. Without interaction case is the case in which ends of the structure are assumed to be fixed while in interaction case, structure is assumed to be resting on soil strata (ends are not fix). Type of supporting soil has been also changed based on modulus of elasticity of soil (soft, medium and hard soil). STAAD Pro. 2006 software has been used for analysis. It has been observed that response of G+12 storey building is affected more by soil structure interaction effect as compared to G+5 storey building. In case of soft soil the response of both type of buildings are changed very drastically compared to without interaction case. While in case of hard soil there is not much difference in response of buildings compared to without interaction case. Medium soil is showing intermediate effects.