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Comparative Study on Seismic Response of Irregular Structure with Lead Rubber Bearing and Friction Pendulum Bearing Base Isolation System

Base isolation is one of the most modern technique and widely accepted seismic protection system used in the building in Earthquake prone areas. The base isolation system separates the structures from its foundation and primarily moves it relative to that of the super structure. The main objective of this project is to understand the seismic performance of a G+10 irregular building made of three different materials such as RCC, Steel and Composite with Lead Rubber Bearing (LRB) and Friction Pendulum Bearing (FPB) base isolation system and to compare the seismic response with and without base isolation using Response spectrum method in ETABS-2015 software. The response of the structure such as time period, base shear, story drifts and story displacements are studied and comparison is made. From this study it can also be concluded that it is better to provide isolation systems in seismic prone areas rather than providing fixed base and among two isolators used here FPB performs better than LRB for all the structures.