Evaluation of the effect of explosion on the concrete bridge deck using LS-DYNA

Abstract

Due to serious damage of concrete structures caused by natural hazards and accidents, evaluating dynamic response of these structures is one of the most important objectives in the field of engineering. In this article, a case study is carried out in order to understand influences of blast load on a concrete bridge. In order to do so, 3D Finite Element Method (FEM) has been used to assess the dynamic response of the bridge and the failure zone for the detonation a of different amount of TNT, on the bridge deck. The results indicate that detonation of 1630 kg TNT causes 12 meters’ failure on the bridge deck. This amount of destruction is twofold greater than the failure occurred during the explosion of 1000 kg TNT. It can be expressed as follows: when the amount of TNT increases by 39%, the destruction of the bridge deck will increase by 100%.