Seismic Analysis of RCC Building With Soft Story

With urbanization and increasing unbalance of required space to availability, it is becoming imperative to provide open ground storey and soft storey at different level of multistory building. These provisions reduce the stiffness of the lateral load resisting system and a progressive collapse becomes unavoidable in a severe earthquake for such buildings due to soft stories. Soft storey behavior exhibit higher stresses at the columns and the columns fail as the plastic hinges are formed. Hence it is required to assess the performance level of such building for safety of the structure during earthquake. In present study G+12 storey building is considered by keeping soft storey at different level along with soft storey at ground level. They are designed according to IS 456-2000 without ductile detailing and seismic evaluation of these buildings is carried out with nonlinear static pushover analysis using SAP 2000 software.