Effect on Seismic Analysis of Reinforced Cement Concrete Building Considering Soil Structure Interaction

Abstract

Abstract

Many researches and case studies indicate that soil structure interaction (SSI) has a significant impact on dynamic response of structure, which may lead to unexpected seismic response or failure of structure. Current seismic codes adopt the methods in which, generally, flexibility of soil is not considered in seismic analysis of reinforced cement concrete (RCC) building. In this study, seismic response of a 35 m tall G+9 storey building resting on raft foundation is studied considering soil structure interaction. Response spectrum method of dynamic analysis has been used to analyze the building for seismic zone V according to IS 1893:2002 in FEM software CSI SAP 2000, Version 14 [1]. Elastic continuum approach is used to idealize the soil. Storey shear forces and lateral time period has been compared for fixed base and flexible base buildings resting on raft foundation. The study reveals that on considering SSI, there is an increase in lateral time period of the building and re-distribution of storey shear forces in flexible base model as compared to fixed base model.

Keywords: Soil-structure interaction (SSI), structural response, storey shear, time period, inter storey drift

Cite this Article

Vaibhav Singh, Kanchan Mala. Effect on Seismic Analysis of Reinforced Cement Concrete Building Considering Soil Structure Interaction. Recent Trends in Civil Engineering & Technology. 2016; 6(3): 10–14p.