Failure analysis of gas explosion load based on structural impact failure characteristics

The purpose of this study is to obtain the peak of the gas explosion load which is affected by many factors and is not easy to determine. Explosion peak is a key factor in the time-load curve of the explosion field. In this paper, the static and dynamic modal analysis method of gas explosion fracture of reinforced concrete prefabricated slabs is used to obtain the static fracture, maximum reflective pressure applied and peak dynamic load of prefabricated plates. In the actual explosion study, all three prefabricated plates broke at one-third, and the peak dynamic load was 6.743 times the span buckling load in the plate. The analysis also shows that when plastic hinges appear at one-half, the above ratio is 3 times. The calculated peak is within the pressure range of the explosion test. The Baker model is used to fit the explosion time-load curve. This function is applied to the dynamic analysis of the finite element analysis of the explosion plate, and the failure of the plate is more consistent with the explosion case site. The median value of the explode field load time-load equation with the curve function can be applied to the rapid evaluation of post-explosion structure.