COMPUTATION OF BLAST LOADING FOR A MULTI STOREYED FRAMED BUILDING

Sarita Singla, Pankaj Singla, Anmol Singla

Abstract: The number and intensity of domestic and international terrorist activities have heightened our concerns towards the safety of our infrastructure systems. Due to different accidental or intentional events, related to important structures all over the world, explosive loads or blast loads have received considerable attention in recent years. The development in this field is made mostly through publication of the U.S. Army Corps of Engineers, Naval Facilities Engineering Command (NAVFAC), and Air Force Civil Engineer Support Agency. In India also, the guidelines for the blast loading are published in IS 4991. In the present study, blast pressures for different weights of surface blast or TNT and varying stand-off distances are computed for a multi-storeyed framed building adopting wave scaling laws given by U.S Army technical manual (UFC3-340-02). Blast pressures for different cases are computed using correlation between blast pressure and blast scaled distance based on charts given in U.S manual. Time history loading is also obtained with parameters of reflected total over pressure and duration of positive phase of blast.

Keywords: blast loading, blast wave, scaled distance, blast pressure

DOI: https://doi.org/10.15623/ijret.2015.0402105