PERFORMANCE EVALUATION OF RCC BUILDING BY CHANGING THE DESIGN PARAMETERS

Performance based seismic design is a modern day design approach of finding out the reliability of a building during and after a seismic activity. It was used originally for monitoring the performance reliability of old buildings for rehabilitation with seismic provisions. It is an extension to limit state design approach which when analyzed using non-linear static analysis gives the reliable performance level of the building. Performance based seismic design allows us to design the building with a realistic understanding of risk of life, occupancy and economic losses that may occur from future seismic activities. It allows us to construct a building with expected performance in seismic activity. The non-linear performance level of a RCC building is affected by its design parameters one of which major contributor is the longitudinal and transverse reinforcement present in the columns and the beams of a structure and is also affected by modelling parameters such as nonlinear hinge properties, hinge length etc. This present study includes analyzing a 5 storeied RCC building using response spectrum analysis for zone III and designing the building for the response spectrum analysis results. The performance point of this building is evaluated using pushover analysis as per FEMA 356 and the plastic hinge behavior is studied. The results are presented in terms of static pushover curve, displacement and hinge status. For shifting the performance of the same building towards lower side, design parameters are changed and performance is evaluated and the results are discussed in terms of percentage change in design parameters. Keywords— Performance based seismic design, pushover analysis, static pushover curve, plastic hinge, performance point.