SEISMIC DEMAND STUDY OF SOFT STOREY BUILDING AND ITS STRENGTHENING FOR SEISMIC RESISTANCE

Abstract The increase in urbanization for the past few years has made the vehicle parking as a major concern. Therefore the first storey of the apartment is used for parking. RC framed buildings with the ground storey open are known to perform poorly during strong earthquake shaking, due to the absence of infill wall, the presence of masonry infill wall influences the overall behaviour of the structure when subjected to lateral forces, when masonry infill are considered to interact with their surrounding frames the lateral stiffness and lateral load carrying capacity of structure largely increase. Earthquakes that occurred recently have shown that a large number of existing reinforced concrete buildings especially soft storey building are vulnerable to damage or even collapse during a strong earthquake. The first storey of the building behaved as a soft story in which the columns were unable to provide adequate shear resistance during the earthquake. So in this paper the study is carried out with various building models such as soft storey structure with shear wall, and soft storey with steel bracings at the first storey. The study includes the analysis of soft storey building with ETABS software by pushover analysis method and the results and conclusion of the analysis is to be included.