Numerical evaluation of the performance of two-way RC panels under blast loads

Abstract

Nonlinear dynamic numerical modelling and analysis of concrete panels subjected to blast loads is presented in this paper. Reinforced concrete panels of dimension 1.0×1.0 m and different thicknesses and supported on four sides are subjected to blast loads produced by the detonation of high explosive charges. The modelling and analysis was conducted using ANSYS AUTODYN solver. The accuracy of the model is verified against experimental results of blast load tests on reinforced concrete horizontal slabs subjected to the detonation of high explosive charges above them. The model was capable of simulating the observed damage and displacement with reasonable accuracy. The verified model is used for extensive parametric study to examine the effect of different design parameters on the performance of reinforced concrete slabs under blast loads. The design parameters considered in this study include the effect of concrete compressive strength, panel thickness, reinforcement steel ratio, arrangement of reinforcement steel, and boundary condition on the behaviour of RC panel under blast load. The performance was evaluated in terms of maximum displacement, extent of damage and energy absorbed. © 2014 WIT Press.