Abstract: The terrorist activities and threats have become growing problem now a days all over the world. A bomb explosion within or immediately nearby a building can cause catastrophic damage on the building's external frames, collapsing of walls and internal structural frames. Many of the existing buildings which are not designed for blast loads get damaged or even fully collapsed when subjected to such loadings. Therefore explosive load or blast load are important for designing structure. In present study a five story rc frame structure has been chosen for investigating the effects of blast loads. The blast load parameters are determined by adopting wave scaling laws given in u.s army technical manual unified facilities criteria structures to resist the effects of accidental explosions (ufc3-340-02) and dynamic analysis is performed using staad pro in order to determine the effects of blast impact on the structures.

Keywords: Blast load, Time history analysis, Staad pro, dynamic analysis, Framed structure.