COMPARATIVE STUDY OF BASE ISOLATED & FIXED BASE RC FRAME STRUCTURE

Abstract

Earthquake can cause significant or severe structural damages. To protect the structure from severe damages, different kind of structural design techniques are used such as providing shear wall, bracing in building, use of base isolation device and dampers etc. In present study we are going to use base isolation technique. These techniques reduce the seismic forces by providing the high lateral flexibility, which in turn increase the time period of vibration of structure & reduce the base shear. The research and development works of different types of base isolation technique are ongoing intensively. This study presents a brief history of isolation techniques and preliminary design of high damping rubber bearing and lead rubber bearing isolator with the help of provisions provided in uniform building code (UBC -1997). In this study, modeling and analysis of G+6 story fixed base and base isolated structure is carried out using E-TABS software in order to evaluate floor response, displacement, drift, time period of structure during earthquake. This study intends to demonstrate how an isolation system can be efficient for earthquake resistant design of building.