Analysis of Blast Loading and Its Effect on Framed Structure

This When bomb explosion occur near a building causes catastrophic damage to building and danger to human life. It primarily includes damage on external and internal structural frames, crack in beam and column, collapsing of wall, blowing out of windows and shutting down of various life safety systems. Reason for loss of life and injuries to occupants includes direct blast effects, structural collapse, debris impact, smoke and fire. While indirect effect may consider prevention of timely evacuation of occupants, thereby contributing to additional casualties. In addition, explosion occurred in chemical gas plant creates more catastrophic damage to surrounding by generating high frequency blast waves and dynamic loads greater than original design dead loads. Due to threat from this dynamic loading condition, major efforts have been taken in the past few decades to develop method for structural analysis and to resist blast load. To analyse and design structure subjected to blast impact needs detailed understanding of blast occurring phenomena like intensity, standoff distance and dynamic behaviour of structural member. In the paper response of framed structure subjected to same axial loads and lateral blast loads was studied. The finite element software ANSYS AUTODYN used to model framed structure of high strength and normal strength is considered. For generating response same loading was applied to framed structure and equilibrium state is determined. Further short duration blast load was applied and deflection-time response and directional deformation was calculated.