Response of Structure under Dynamic Blast Loading using Friction and Viscous Dampers

Abstract

From last few years terrorist activity and civil war are increased throughout the world. Terrorist group use explosives around the world to target high importance buildings. World trade center in 1993, the Murrah building in 1995, U.S. embassies in Nairobi and Dar es Salaam in 1998 are example of structure under terrorist attack by vehicle bombing. Failure or structural collapse of this buildings due to blast load may cause loss of life and economical wealth of the country. Due to such threats, now a day’s efforts are made to develop methods for analysis and design of high importance buildings to resist blast loads. This Present Study includes analysis of 10 storied building with different explosive charge and standoff distance. Using Time History analysis. The blast load was analytically determined as a pressure-time history and numerical model of the structure was created in ETABS 2017. The response in terms of various deformations and the performance of the sample building is studied. Response of blast excited building is studied and reviewed for 0.2 and 0.3 Tonnes of TNT placed on ground at 10m. The review mainly emphases on response to spontaneous load and performance level of building under different blast loads. The blast load is calculated IS 4991-1968 criteria for blast resistant design of structures for above ground explosions.The analysis of either of structure subjected to blast loads requires a peak deflections, drift, and accelerations, is calculated and compared.