Analysis Of Multistoried Irregular Building With And Without Floating Column Using Etabs

Abstract

In construction scenario of present days, floating column is growing as a new feature for the reinforced concrete framed buildings in urban regions of India. Generally, in earthquake prone areas such type of practices is undesirable. Use of floating column tends to increase the moments in columns, storey shear and storey drifts, etc. which ultimately decreases the strength of structures. The present study emphasizes to evaluate the presence and absence of floating column in high rise Irregular building for the different cases of RC frames were studied and analysed by dynamic analysis. In present study eight models are used ‘Model 1 (G+14 Irregular building without floating column)’, ‘Model 2 (G+14 Irregular building with floating column at all four corners in ground floor only)’, ‘Model 3 (G+14 Irregular building with floating column at all four corners in second floor only)’, ‘Model 4 (G+14 Irregular building with floating column at all four corners in third floor only)’, ‘Model 5 (G+14 Irregular building with floating column at all four corners in fifth floor only)’. ‘Model 6 (G+14 Irregular building with floating column at all four corners in seventh floor only)’, ‘Model 7 (G+14 Irregular building with floating column at all four corners in ninth floor only)’, ‘Model 8 (G+14 Irregular building with floating column at all four corners in eleventh floor only)’ Seismic analyses of all eight models have been carried out using Response Spectrum Method (RSM) at zone (IV). Further comparisons of results on the basis of parameters such as Storey Drifts, Storey Displacements, etc. for all eight models are executed. This analysis is executed using ETABS 2016 software as per the codal provisions of IS: 1893-2002. In this way floating column structures play a vital role for the occupancy and free circulation feature. Present study claims that the use of floating column in seismically active areas may cause a hazardous damage to the RC frame structures.