A Seismic Response Evaluation Of Rc Building Over Soil Considering Soil-Structure Interaction

Abstract

In the conventional design practice, the building is generally considered as fix support without the soil properties but the structure beneath the foundation is obviously the different types of the soil in real. So, the motive of this study is to acquire the realistic approach about the response of different soil. The study has focused on SSI analysis of RC frame structure of 3 bays in each direction as 3 storey, 7 storey and 10 storey with the fix support and soil condition. In this paper, the effects of soil are evaluated in seismic response of geometrically regular buildings. The response of RC frame building is investigated using SAP 2000. The linear time history analysis of the Gorkha earthquake has been used to carry out the response of structures as per IS 1893-2016. Base shear, fundamental period, roof displacement, and storey drift were examined between fixed base and soil condition. Elastic continuum model and spring model are used for generating models for analysis. The comparison between fix support, elastic continuum model and spring model have been performed in lucid way. The total of 21 model were taken and the change in the seismic building parameters was visualized among these building. From the results and conclusions of the research, it is evident that accounting for a flexible foundation leads to an increase in the fundamental time period and roof displacement, while base shear decreases. The interaction between soil and structure significantly impacts the seismic performance of buildings. Ignoring SSI in building design can result in unsafe structures, especially in areas with soft soil.