爆炸沖擊荷載作用下雙向張弦梁結(jié)構(gòu)動(dòng)力響應(yīng)分析
殷志祥，趙思達(dá)
- 摘 要
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（遼寧工程技術(shù)大學(xué)建筑工程學(xué)院，遼寧阜新 123000）[摘要] 針對(duì)大跨度雙向張弦梁結(jié)構(gòu)建筑是人群密集公共場(chǎng)所而易遭受爆炸襲擊的問題，首次對(duì)dui在爆炸荷載作用下的雙向張弦梁結(jié)構(gòu)性能進(jìn)行研究，以說明結(jié)構(gòu)的動(dòng)力響應(yīng)規(guī)律，提高這類結(jié)構(gòu)的抗爆炸安全性。以爆炸沖擊波動(dòng)力理論為基礎(chǔ)，應(yīng)用ANSYS/LS-DYNA軟件，利用雙向張弦結(jié)構(gòu)索的平衡荷載與索曲面及索拉力之間的關(guān)系，對(duì)在爆炸荷載作用下的雙向張弦梁結(jié)構(gòu)進(jìn)行模擬，得到了結(jié)構(gòu)在外部爆炸荷載下沖擊波的傳播規(guī)律、張弦梁下部預(yù)應(yīng)力索的軸力，上部桁架桿件的軸向力和節(jié)點(diǎn)位移時(shí)程變化規(guī)律。為今后設(shè)計(jì)考慮爆炸沖擊荷載對(duì)結(jié)構(gòu)的影響提供借鑒。[關(guān)鍵詞] 爆炸荷載; 雙向張弦梁結(jié)構(gòu); 外部爆破; 動(dòng)力響應(yīng)中圖分類號(hào)：TU394，TU393.3 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2013)S2-0493-05作者簡(jiǎn)介：殷志祥：1962年出生，男，河北趙縣人，教授，博士生導(dǎo)師。主要研究方向：大跨度空間結(jié)構(gòu)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
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