Seismic Evaluation of Multistorey RC Vertical Irregular Buildings with Fixed Base and Laminated Rubber Bearing Base Isolation on Sloping Ground Using Pushover Analysis

Ashwini Chavan
P.G. Student, Civil Engineering Department, V P Dr.P.G.Halakatti CET, Vijayapur , IN

M.Q. Patel
P.G. Student, Civil Engineering Department, V P Dr.P.G.Halakatti CET, Vijayapur , IN

Keywords: Base Isolation, Fundamental Natural Time Period, Bash Shear, Displacement, Storey Drift, Performance Point and Location of Hinges, Ductility Ratio, Safety Ratio , Equivalent Static Method, Response Spectrum Method, Pushover Analysis

Abstract

Base isolation device has been widely adopted structure protection from seismic. It reduces the seismic demand rather than increasing the earthquake resistance capacity of the structure. Building on sloping ground is one of the factors which reduce the capacity of the structure due to the columns in the ground storeys are of different heights which leads the combination of short and long column. In this present study ten storied vertical irregular building models on 11o sloping ground is considered. The models with fixed base and base isolated building analysis are done by using ETABS 2015 software. The laminated rubber bearing is considered to study the effect of building with fixed base and base isolation on sloping ground by using equivalent static method, response spectrum method
and pushover analysis as per IS 1893 (Part 1): 2002. The results like time period, base shear, displacement, storey drift, and performance point, location of hinges, ductility ratio and safety ratio were discussed by comparing fixed base and base isolated buildings

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