Seismic Analysis of Soil Structure Interaction on Different Structural Parameters using ETABS Software

Abstract

The purpose of the investigation is to study the behaviour and interaction between the super-structure and sub-structure by modelling the soil as Winkler Springs. The present study is performed on regular space frames of 3 bay in both x and y directions, 10 storey (3x3x10) and irregular space frames (re-entrant corner L, mass irregularity and stiffness irregularity) of 10 storey, all space frames resting on raft foundation with fixed and flexible base. Mainly three types of soil i.e. Hard, Medium and soft soil are considered for the study. The analysis is carried out in seismic Zone-V. The present analysis has been made using the Response Spectra Method of IS: 1893 -2002 (Part 1) [1]. The models are developed and analysed using ETABS V 13.2 software. The structural parameters such as natural period, storey shear, storey-drift, roof displacement, storey stiffness, axial forces and moments in columns are studied. The comparison is made between Soil Structure Interaction (SSI) and Non Soil Structure Interaction in Zone V.