SEISMIC RESPONSE OF MULTI-STOREY IRREGULAR BUILDING WITH FLOATING COLUMN

Isha Rohilla, S.M. Gupta, Babita Saini

Abstract: In recent times, multi-storey buildings in urban cities are required to have column free space due to shortage of space, population and also for aesthetic and functional requirements. For this buildings are provided with floating columns at one or more storey. These floating columns are highly disadvantageous in a building built in seismically active areas. The earthquake forces that are developed at different floor levels in a building need to be carried down along the height to the ground by the shortest path. Deviation or discontinuity in this load transfer path results in poor performance of the building. In this paper, the critical position of floating column in vertically irregular buildings has been discussed for G+5 and G+7 RC buildings for zone II and zone V. Also the effect of size of beams and columns carrying the load of floating column has been assessed. The response of building such as storey drift, storey displacement and storey shear has been used to evaluate the results obtained using ETABS software.

Keywords: Floating column, Irregular building, Response spectrum method

DOI: https://doi.org/10.15623/ijret.2015.0403086