Dynamic behavior of composite floor consisting profiled steel sheet and dry board under explosion load

One of the kinds of structural floors system is consisting of profiled steel sheet and dry board which connected to each other by self-drilling and self-tapping screws. The aim of this research is study on the behavior of mentioned floor under explosion load. For this purpose, effect of various parameters such as: thickness of dry board and profiled steel sheet, kind of bry board, screw spacing, boundary conditions, floor dimensions, duplicate of mentioned surfaces, and also weight and distance of explosive material from the center of floor, on the nonlinear dynamic behavior of the mentioned floor is studied. This study is performed by using numerical finite element method taking advantage of ABAQUS software. The research results show by varying parameters such as: thickness and kind of bry board, dimensions and boundary conditions of floor, duplicate of main elements, and also distance and weight of explosive materials, significant changes in floor maximum displacement and strain energy is created, but varying of other above mentioned parameters not create significant changes in them. The profiled steel sheet and dry board reach to their yield stress under various structural conditions and floor loading, though in many cases, they not reach to their yield stress. The results of current research present great help to researchers and designers in identification effective and ineffective parameters on the behavior of studied floor under explosion load.