“Comparative Study on Seismic Analysis of R.C Structure with Fixed and Spring Base in Different Zones and Soil Types Considering Soil Structure Interaction”

Abstract

The nonlinear behavior of soil leads to complexity of a structure during earthquake. In recent trend soil structure interaction is considered only in very few cases and the structure is analyzed under the assumption of fixed or hinged base. Indian Standard Code also do not provide method for seismic analysis based on soil structure interaction since it has complication in analysis procedure. The response of a structure during earthquake is heavily influenced by soil structure interaction. In this study the comparative study on seismic analysis of RC frame structure with fixed and spring base in different zones of India are done taking different soil types and considering soil structure interaction. Two modes of soil structure interaction are considered for the analysis, one is replacing soil by spring and second by considering the whole soil mass. For the analysis purpose SAP 2000 software is used. For soil structure interaction study soil types considered are hard, medium and soft soil. Parameters such as displacement, drift and base shear are considered to determine the influence of soil structure interaction.