ANALYSIS OF RC FRAMES SUBJECTED TO BLAST LOADING

Abstract

Now a days reinforced concrete frame buildings have become most common type of structures built for residential, commercial and industrial use around the world. These frame structures are generally built to take care of conventional loads like dead load, live load, wind load and earthquake load. Due to growing terrorist attacks in the form of blast and industrial explosion around the world it has become essential to design some important building frames for shock waves generating from blast and industrial explosions. A study on the generation, propagation and development of blast waves in the form of shock front which actually acts on the building frames has been carried out in the present study. The numerical modeling of frames (2D and 3D) under the action of blast loads which causes non-linearity in the structural materials has been carried out using ABAQUS/Explicit. ABAQUS is finite element software which has been found sufficiently suitable for the above kind of simulation. To model the non-linear behavior of concrete "Concrete Damaged Plasticity" and for steel well known 'Johnson-Cook elasto-viscoplastic" material models available in the code has been used. Two and three dimensional frames have been analyzed with and without infill panels. The displacement has been observed at a node subjected to maximum displacement. The results thus obtained have been discussed. A comparative study has also been carried out to compare the displacement of the selected node with and without the inflfl.