Seismic assessment of irregular reinforced concrete frame structures using triple friction pendulum bearing

Abstract

In the present scenario due to the fluctuating demand and need for the recent generation has made the designers and engineers plan the building have irregularity. The current study copes with the irregular building having the asymmetric plan as per code IS 1893:2002(Part1). If these buildings are constructed in the earthquake-vulnerable area then they should be designed to resist earthquake forces. Base isolation is the one of the most prominent and widely accepted passive control technique developed to prevent or minimize these forces by isolating the superstructure from the substructure. The Triple Friction Pendulum Bearing (TFPB) is picked as an isolator for the current study. TFPB has offered better seismic performance, lower bearing costs and lower construction cost and has adaptive behaviour. The response of a G+10 and G+20 base isolated and fixed base building are evaluated. For the analysis, symmetrical and different asymmetrical plan shapes like L, T,+, C are considered. Response Spectrum Analysis is carried out for the study by using the software SAP 2000 version 19 for two cases. The results show that in the base isolated building there is a grow in storey displacement, time period and greatly reduced the base shear, storey acceleration compared to base fixed structures.