COMPARATIVE STUDIES ON MULTI-STORIED R.C BUILDING AND STEEL BUILDING SUBJECTED TO BLAST LOADING

Abstract

In the present study, analytical study has been carried out to examine the performance of a typical multi storied building for two cases i.e., steel building and R.C building under blast loading. For both Steel and R.C.C constructions, an eleven-storey building with plan dimensions of 25m X 20m and each storey height of 3m was considered for the study The structure had 5 bays in the X direction with a 5m bay spacing and 4 bays in the Y direction with a 5m bay spacing. The variables considered included stand-off distance (5,10 and 15m) and charge weight (0.3,0.4 and 0.5MT) for both cases. The parameters studied for these variations included Peak base shear, Peak displacement (X and Y direction) and column forces (axial, minor and major axis moment). Increase in peak base shear and peak displacement was seen with increase in charge weight in both cases. However, peak displacement reduced with increase in standoff distance from the buildings in both cases. The axial loads and moments (minor and major axis) also increased with increase in charge weight in both cases. The R.C building showed maximum axial loads and moments when compared with steel building.