Seismic Analysis of Multi-Storeyed Building with Underneath Satellite Bus Stop and Intermediate Service Soft Storey Having Floating Columns

Generally masonry infill walls are considered as non-structural elements and their stiffness contributions are ignored in the analysis when building is subjected to seismic loads. RC frame building with open ground storey is known as a soft storey, similar soft storey effect can be observed when soft storeys at different levels of structure are constructed. From the past earthquake it has been observed that a building with discontinuity in the stiffness and mass subjected to concentration of forces and deformations at the point of discontinuity which may leads to the failure of members at the junction and collapse of building. Most economical way to eliminate the failure of soft storey is by adding shear walls to the tall buildings. Hence in this paper attempt has been made to study performance of a building with soft storey at GL along with at intermediate level of building with floating columns, type of shear wall in seismic prone areas. The effectiveness of RCC shear wall building is studied with help of ten different models. Analysis is carried out by ETABS software. Fundamental time period, base shear, storey displacement and story drift is calculated by equivalent static analysis(ESA), response spectrum analysis(RSA) and time history analysis(THA) compared for all models. The results were compared with SAP2000 software. The results shows that the infill wall and shear walls gives the better performance in seismic analysis of building, so it is essential to consider the effect of infill and shear walls in the analysis.