Investigation of the Performance of Sandwich Floor Under the Explosive Load by Finite Element Method

Nowadays, with the spread of explosive attacks on buildings in the world, a detailed study of the behavior of structures under the influence of explosive loads is a necessity. The explosion is a reaction in which the rate of burning material is carried out at a much higher rate than the sound speed, resulting in a very high temperature and pressure gradient generated and the shock wave is immediately generated and released at a very high speed. In this study, considering the importance of the subject, we examined the behavior of the panel sandwich ceilings under the canwep loads using Abqus 2016 software. In order to validate the results of the numerical examples, we first verified the results of a sample of the reference article and, after correctness of the results, we applied numerical modeling to six models and extracted the results in Excel software. In this research, numerical examples include two groups of roof panel sandwich panels that differ in interior hardening intervals. Both groups under the load of 1, 2 and 3 kg of TNT were located at a distance of 20 cm from the center of the roof and examined the impact of the explosive charge on the distribution of stress and displacements in the samples. As expected, according to the samples, the explosion of the explosive and the increase in distance from the surface of the panel reduced the amount of displacement and stresses on the panel, as well as the distance of the explosive from the surface of the panel and the increase in the amount of explosive material, displacement and The tension on the panel has also increased.