| In recent years,domestic accidental explosions have repeatedly made headlines,and the building structure has been damaged to varying degrees under the effect of explosion loads,and caused a large number of casualties and property losses.In response to explosions causing casualties and property losses,as well as building safety issues,Chinese scholars have responded actively,and have conducted extensive research on the anti-explosion of structural members and the pressure relief protection of structures under the effect of explosion.It is aimed at structures with less filling walls and large indoor space such as industrial plants and medical plants.However,there are relatively few studies on the use of reinforced explosion-relieving combined filler walls in RC frame structures with many infill walls and small indoor space.Therefore,this subject puts forward the research on the influence of the reinforced explosion-relief combined filling wall on the RC frame structure under the effect of implosion.The main work content and conclusion of this article are as follows:In this paper,ANSYS / LS-DYNA software is used to carry out numerical simulation and analysis on the explosion impact problem.Through the research literature,the method,material model,keyword parameters,material destruction criteria and numerical modeling methods of the LS-DYNA explosion analysis required for this subject are determined.Select the existing implosion test of others,perform numerical simulation on the explosion load test of the existing frame structure and carbon fiber cloth reinforced block wall,and verify the numerical simulation method proposed in this paper by comparing the numerical simulation results with the test results rationality.The comparison of the results shows that the simulation results of the selected numerical simulation method are in good agreement with the experimental results.In order to study the impact of different types of filling walls on the degree of damage to the RC frame structure under implosion,the two-layer L-type RC frame structure was selected as the research object.For the RC frame structure model,the ordinary concrete block wall,carbon fiber cloth reinforced block wall,Numerical simulation was carried out under the condition of reinforced concrete block wall reinforced with foam concrete blocksand carbon fiber cloth.The results show that the damage of the RC frame structure reinforced by carbon fiber cloth is much greater than that of the RC frame structure of ordinary concrete block walls.But for the use of foam concrete blocks and carbon fiber cloth to reinforce the combined wall of the block is more beneficial to the RC frame structure,so the method of setting the explosion-proof area on the reinforced wall is feasible.In order to study the influence of the reinforced explosion-relief combined filling wall on the RC frame structure under the effect of implosion,in this paper,the two-layer RC frame structure model is under a certain TNT equivalent,the reinforcement wall is not equipped with reinforcement,the explosion-proof area,and the filling wall is set with different reinforcement Numerical simulations were carried out under conditions such as explosion areas.The results show that jets are easy to form at the entrance of the infill wall,which is not conducive to the safety of personnel and property in the building.Therefore,setting explosion vents on the inner wall without openings requires careful consideration.The explosion relief area on three walls is better than that on two outer walls.The three walls are provided with explosion-proof areas.The RC frame structure with many infill walls and small indoor space adopts the reinforced explosion-proof combined infill wall to conduct explosion relief,which is of great significance to the disaster prevention and mitigation and safe use of the building structure. |
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