Abstract: A bomb explosion inside or near a building can inflict catastrophic damage to the building's external and internal structural frames, as well as the failure of walls, the blowing out of wide expanses of windows, and the shutdown of vital life-safety systems. Many factors can result in occupant deaths and injuries, including direct explosion effects, structural collapse, debris impact, fire, and smoke. In the present study, G+5 storeyed building is subjected to 200, 400kg charge weight of the blast load with a standoff distance of 10, 15, 20, 40 and 60m. IS:4991 – 1968 is used to determine the blast parameters. The time history analysis is carried out using ETABS 2019 software. Blast pressure time history graphs are also prepared. A comparative study for blast loading is carried out for different parameters like maximum storey displacement and storey drift. Safe charge explosive and safe stand-off distance are obtained for the RCC structure with the sections of structural elements. To make the building more resistible for blast load, various structural systems like shear wall and steel bracings are implemented.

Keywords: Blast load; Standoff distance; Charge weight; ETABS 2019.

| DOI: 10.17148/IARJSET.2022.95100