Modelling of a Reinforced Concrete Panel Subjected to Blast Load by Explicit Non-linear FE Code

A 5000 kg TNT blast test was conducted at Woomera, South Australia on a reinforced concrete panel. This paper reports on the numerical analysis of this 1.19m×2.19m×0.14m RC panel under the blast load. The peak reflected overpressure, peak reflected impulse, arrival time and blast duration are predicted by computer programs AIR3D and CONWEP. These blast pressure time histories are compared with the pressure measured by a pressure transducer attached to the test module. The dynamic structural behavior of the RC panel is modelled by the explicit numerical analysis code, LS-DYNA. The concrete model in LS-DYNA which considers three failure surfaces is adopted to model the concrete material for the panel. An elasticperfectly plastic model represents the steel reinforcement in the panel. The maximum deflection of the panel from the explosive test is compared with the numerical analysis results. The comparison of the results obtained from numerical analysis and experiment demonstrates the capabilities of these software packages to simulate the structural behavior of a RC panel under explosion.