Numerical Study On Explosion-proof Performance Of Reinforced Concrete Explosion-proof Wall Based On ANSYS/LS-DYNA

In recent years,accidental explosion accidents and terrorist bombings have occurred,caused a great threat to the safety of human life and property.The explosion comes,how to resist the threat of explosion is one of the current hot issues.The building explosion design is one of the important work may occur explosion of building structure the design,has very important practical significance on the protection of the building itself and the interior of the building staff's life and property safety.The explosion-proof design mostly in concept design stage,when the building under blast loading,explosion-proof performance specific structure or component is not quantitative,so we need to have proof explosion-proof protection design design of complete and clear to complete the structure,design and design of explosion-proof explosion-proof wall holds The pivotal position.The reinforced concrete structure has good antiknock performance,but also has convenient,low cost advantages,is the blast resistant material of choice.In this paper,theoretical calculation and numerical simulation on the dynamic response of reinforced concrete wall under blast loading.In this paper,the specific research results are as follows:(1)the numerical simulation of free air explosion is carried out,and the numerical results are compared with those of the formula.The results show that the difference between the numerical results and the theoretical results is quite large when the reduced distance is smaller.The difference between the calculation results of each empirical formula is also very large.When the commutation distance Z>0.6m/kg1/3,the error between the numerical results and the empirical formula results is relatively small,and the numerical simulation results are always smaller than the empirical formula results.It also shows the conservatism of theoretical calculation.(2)In this paper,the maximum displacement of the model is calculated by using the approximate theoretical method of equivalent single-degree-of-freedom system,and the results are compared with the numerical simulation results.The minimum error is 1.75%and the maximum is 17.31%.The calculated results are consistent with those of the numerical simulation,which indicates that the numerical simulation in this paper is reliable.(3)the dynamic response parameters of model two proposed in this paper are smaller than that of model one under the same explosion load,which shows that the anti-explosion performance of the composite structure wall proposed in this paper is better than that of the ordinary reinforced concrete explosion-proof wall.The maximum antiknock performance can be improved by 32.1%,but with the decrease of the folding distance,the lifting effect is decreasing.At the same time,other factors affecting the anti-explosion performance of the wall are studied.The results show that increasing the reinforcement ratio of the wall,improving the strength grade of concrete and increasing the thickness of the wall can improve the anti-explosion performance of the wall.In particular,to increase the wall thickness of the lifting effect is the most obvious.The research results of this paper can provide a certain reference for the wall anti-explosion design.