Comparative study on progressive collapse analysis of RC frame buildings subjected to wind and seismic loads

Abstract

Progressive collapse occurs when the local failure of the primary structure leads to an eventual collapse of the structure as the adjoining load-bearing elements fail to transfer the load of the lost column. This analysis checks whether the load transfer from adjoining members upon loss of columns. A 10-storey RC structure of square and circular plan geometry were considered in this study. The buildings were modelled and designed for gravity, wind and earthquake loads as per the guidelines of respective Indian Standards. Further those models were examined for progressive collapse considering different critical column removal scenarios. The DCR results were calculated for the adjacent beams and adjacent columns to check whether the structure elements reach an alternate equilibrium of the load path or not. Out of both the geometry, the circular plan building was showing better performance then square plan building and it is about 10% to 20% better based upon all the analysis and for different loading conditions.