PUSHOVER ANALYSIS OF BUILDING WITH FLOATING COLUMN STRENGTHENED BY SHEAR WALL

Abstract

In a constructive world of emerging high-rise buildings, due to the lack of space, floating column adds as an advantage for proper functioning. Floating column introduced in seismic prone areas is found to be hazardous. Stability of such structures seems to be an important factor. Shear wall is one of the efficient lateral load resistors. Therefore, proper analysis can help the structure to attain column free space and strength. Pushover analysis is a non-linear static analysis in which the ultimate load, deflection capability and the critical members can be determined. In this study, pushover analysis is being done on six-storey building with floating columns provided at ground storey. Pushover analysis is being done in ETABS software. Comparison on building with and without shear wall is done. Influence of shear wall at different locations, ie, at core, periphery and corner are analysed. Shear wall with opening of size 1x1m is provided to study the influence of opening in stability of the structure. From the study it is clear that building with shear wall performs well and could reduce the displacement about 80%. In a building without a shear wall even though target displacement is high, load carrying capacity is found to be low. Shear wall fails prior to structural member, which resist the building from collapse. In the last step of pushover analysis, the collapse of building without shear wall occurred on first floor, which can lead to total collapse of building. In the case of models with shear wall collapse occurred on the upper floor, shows better performance than the building without shear wall