Last modified: 2016-06-25
Abstract
Several tests were performed loading 200 mm thick concrete slabs on the ground with combined shrapnel impact and blast pressure waves. Cylindrical TNT charges 8.9 kg in weight at 2.1 m stand-off were used to generate the blast loads and propel steel ball bearings to generate the impact loads. The damaged slabs were then tested quasi statically in 3 point bending to measure their residual capacity. In this research, the Ls-Dyna finite element analysis (FEA) software was employed to simulate both the dynamic and the quasi static parts of the experiment, with the aim of reproducing the recorded residual capacities. Solid elements were used for all the structural components of the model and appropriate failure conditions were employed to represent the dynamic damage. Additionally, a slip condition was included between the concrete and the steel reinforcement. Results showed that the peak residual capacity could be adequately represented using theses FEA models.