爆炸冲击荷载作用下双向张弦梁结构动力响应分析
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（辽宁工程技术大学建筑工程学院，辽宁阜新 123000）[摘要] 针对大跨度双向张弦梁结构建筑是人群密集公共场所而易遭受爆炸袭击的问题，首次对dui在爆炸荷载作用下的双向张弦梁结构性能进行研究，以说明结构的动力响应规律，提高这类结构的抗爆炸安全性。以爆炸冲击波动力理论为基础，应用ANSYS/LS-DYNA软件，利用双向张弦结构索的平衡荷载与索曲面及索拉力之间的关系，对在爆炸荷载作用下的双向张弦梁结构进行模拟，得到了结构在外部爆炸荷载下冲击波的传播规律、张弦梁下部预应力索的轴力，上部桁架杆件的轴向力和节点位移时程变化规律。为今后设计考虑爆炸冲击荷载对结构的影响提供借鉴。[关键词] 爆炸荷载; 双向张弦梁结构; 外部爆破; 动力响应中图分类号：TU394，TU393.3 文献标识码：A 文章编号：1002-848X(2013)S2-0493-05作者简介：殷志祥：1962年出生，男，河北赵县人，教授，博士生导师。主要研究方向：大跨度空间结构的研究。Dynamic response analysis of dual-direction beam string structure under explosion loadYin Zhixiang, Zhao Sida(Architectural engineering college, Liaoning Technical University, Fuxin 123000, Liaoning, China)Abstract: In order to improve the anti-explosion ability of the dual-direction beam string structure, lots of dual-direction beam string structures were used in large-space buildings and the places with crowded people via explosion. The simulation software is a necessary tool to solve these problems on highly non-linear dynamics such as explosion. The prior and key work is to use the finite element software-ANSYS/ LS-DYNA by the theory of nonlinear static and dynamic analysis. Based on the relationship of balanced load and the form of cable-net and the tensions of the strings, the structures under blast load were simulated, got the regular pattern of the wave propagation and the axial force of the beam string cable lower and the axial force of the upper truss element and node displacement time history changes. It provided the reference for the design of the structures under blast loadKeywords: blast load; dual-direction beam string structure; external blasting; dynamic response
