COMPARATVE STUDY ON RC FRAME WITH FIXED BASE, BASE ISOLATED RC FRAME USING FRICTION PENDULUM BEARING AND RC FRAME WITH FRICTION DAMPER USING TIME HISTORY ANALYSIS

Abstract

Most of the existing buildings which do not fulfil the current seismic requirements, may suffer extensive damage or even collapse due to earthquake. So to mitigate the effects of vulnerable earthquakes on the strucutre, the base isolation technique and energy dissipation technique is the best alternative as a seismic protection system. The present study is an effort to understand seismic performance of structure with fixed base, structure with friction damper and base isolated structure. In this thesis , a G+5 strucutre is considered and analysed.Total three models of the building frame with fixed base, with friction damper and with friction pendulum bearing are considered. The analysis of strucutre is done by time history method and response spectrum method. The structure is modelled using finite element software ETABS 15.2.2. The building is assumed to be situated in Zone V (as per IS 1893: Part 1) and on medium soil condition. The time history analysis is used to find the seismic performance of strucuture for all three models.Friction Pendulum Bearing (FPB) and Friction Damper(FD) are used for improvement of RC frame building. The procedure of analysis adopted for fixed base strucutre is repeated for Friction Damper(FD) and base isolated structure(FPB) structures,so it will help in comparative parametric study. The results of analysis are compared in terms of storey shear, storey displacement, modal gtime period, storey accelerartion, storey drift etc. and obtained results are presented in graphically and in tabuluar form.