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《Journal of Vibration and Shock》 2012-21
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Numerical simulation for damage of Ma Chang Ping highway toll station under lorry-blasting

GAO Xuan-neng,LIU Ying,YANG Wei-ying(College of Civil Engineering,Huaqiao University,Xiamen 361021,China)  
A numerical simulation model for damage of Ma Chang Ping highway toll station under lorry-blasting was established by employing the FE fluid-structure coupling algorithm LS-DYNA.The shock wave overpressure,failure process and failure modes of the spatial truss structure subjected to explosion were numerically simulated.In order to get the explicit expression of shock wave pressure field and the principal eigenmodes,the blast overpressure data of finite points at the internal surface of the spatial truss structure were extracted and were decomposed with the proper orthogonal decomposition(POD) method.Through a comparative analysis between the simulation results and the actual destruction of the toll station,the failure mechanism and causes for the explosive damage of the spatial truss structure were revealed.The numerical results showed that LS-DYNA nonlinear finite element model combined with the POD method can accurately simulate the destruction process and damage models of the spatial truss structure under blast,and adequate venting can prevent the spatial truss structure under explosion from collapsing and can avoid people wounded.Finally,the design principle of strong structure and weak envelope was proposed for blast-resistant and explosion-proof of spatial truss structures.
【Fund】: 国家自然科学基金项目(51278208);; 福建省自然科学基金项目(2011J01319);; 中央高校科研业务费专项基金项目(JB-JC1005)
【CateGory Index】: TU352.13
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