The Design Method Of The Reinforced Concrete Plate Coated Polyurea Under The Action Of Explosion

Recently, with all kinds of explosion accidents all over the world, more comprehensive attention has been taken to the issue of fortification and antiknock of the buildings. With high bearing capacity and toughness, the reinforced concrete structures is the main building material, thus the research on developing and improving the antiknock performance of reinforced concrete structure is of great importance.The results of this study indicated that reinforced concrete plate coated with high elasticity can strengthen the protection effect of the board, and improve the impact resistance ability of the building. The main research studies and innovative achievements include the following aspects:(1)By using the universal material testing machine and the split hopkinson pressure bar technique, this research studied the elastomer materials (SPUA) of quasi-static and dynamic compression mechanical behavior, obtained the mechanical properties characterization of the SPUA materials, established a high elastic constitutive model based on Mooney-Rivlin model, and provided a referential parameters for the following numerical simulation.(2) High (polyurea) elastomer coating simplified model of reinforced concrete plate was established, and the finite element software with AUTODYN dynamics was used to analyze its dynamic response under the action of explosion load. At the same time under the condition of the fixed quantity according to different coating thickness and coating way of the simulation, the stress of reinforced concrete plate was analyzed under the various conditions center structure, the change of the velocity, displacement and failure process, and the influence of concrete slab of antiknock performance in different thickness and different ways of coating. Through analysis and comparison, polyurea coating thickness and coating method was optimized.(3)According to the polyurea coating reinforced concrete slab test of preventing small equivalent explosive, this thesis calculated the experimental data and simulation data error to validate the simulation, hen analyzed the experimental phenomena, confirmed and improved the effect of polyurea elastomer for explosion-proof effect of reinforced concrete plate combined with theory and numerical simulation, and gave the optimal protection scheme...