Comparative Seismic Analysis of High Rise Buildings with Different Structural Framing

Abstract

Now a day it has been observed that modern trend is towards taller and slenderer structures both residential and commercial increasing rapidly. As the height of structure get increases, the building acts as cantilever and get deflected because of its slenderness. For such structure the effects of lateral loads like winds loads, earthquake forces have become more effective which increasing importance for every designer to face with the problem of providing adequate strength and stability against lateral loads with economic consideration. From the previous studies, it has been concluded that there was not much problem in drift failure particularly in lower seismic zones. But as we go to higher zones than the ordinary multistory buildings also face the problem of drift more than the prescribed by the IS code 1893-2002 which become critical limit causing sudden collapse during earthquake. This study focuses on the various provisions to reduce the drift of building and make it more stable. Some of them are providing shear wall, tube structural system and base isolation system. The analysis has performed using ETABS for G+42 multistoried building in zones III.