Evaluation of Dynamic Response of a Structure When Subjected To Blast Load

Whenever a bomb explosions takes place , outside or inside a building or structures, it leads to large damage of building’s interior and exterior elements. Some of its consequences are as : wall gets collapsed , blowing out of the doors and the windows, breakage of other components which are not able to resist the load produced due to blast. Collapsing of wall , breakage of windows and blowing out of the glasses , flying debris ,mitigating fire and surrounding clouds of smoke often leads to loss of life and injuries to the people’s occupying the building as well to the people surrounding the building’s.The work presented in this thesis , comprises a detailed study of the behavior of single bay – single storey frame building when subjected to blast loading at different scaled distance and a constant weight of charge i.e. 2 ounces. This weight of charge is further expressed in TNT equivalent. Numerically, the value of side- on overpressure and the positive phase time duration has been determined at various scaled distance. Next , for various time interval , the resulting values of displacement and velocity have been worked out effectively. As blast loads are classified as impulsive loading, so the values of displacement and velocity are determined using Duhamel’s integral.