AN EFFECTIVE STUDY ON COMPUTATION OF BLAST LOADING FOR RC FRAME STRUCTURE

Abstract

The structural engineering profession has experienced many significant and complex changes in the past
several decades. Higher strength materials and improved computational methods allow us to design buildings to new
limits of height and span. Recent events involving earthquakes, hurricanes, tornadoes, etc. produced many
unexpected structural problems. This has often resulted in specific building code changes aimed at avoiding similar
problems in the future. Now in the recent time of terrorism, structural engineers require new consideration of terrorist
attack in the design standards .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 first row of column of RC framed structure. Time history loading
is also obtained with parameters of reflected total over pressure and duration of positive phase of blast.