【作者】 崔艳；

【导师】 颜卫亨；

【作者基本信息】 长安大学 ， 结构工程， 2010， 硕士

【摘要】 大跨度空间结构作为人类活动的重要场所和标志性建筑,他们的安全直接牵系着社会经济财富和生命安全。这些年来,随着国际安全局势的紧张,炸弹恐怖袭击和突发爆炸事件明显增多。空间结构若遭受爆炸荷载作用,会产生严重破坏,甚至发生整体倒塌。而我国对房屋结构设计时,一般对持久设计状况和抗震设计状况研究相对较全面和深入。而对短暂设计状况和偶然设计状况研究相对滞后,尤其是对偶然设计状况。对于绝大多数的房屋均未进行偶然设计状况的设计。因此研究空间结构在偶然荷载中的爆炸冲击荷载作用下的动力响应和破坏形态,对有效评价结构体系在突发荷载作用下的安全性,以及建立在偶然爆炸事件和恐怖袭击情况下的防御机制具有极其重要的现实意义。本文在探讨管桁架结构的动力分析方法、爆炸及爆炸作用的基础上。针对某典型工程的管桁架屋盖结构的一榀管桁架为研究对象。运用非线性显示动力学有限元分析软件ANSYS/LS-DYNA,分别讨论和分析了爆炸发生在室内和室外的不同阻尼、屋面等效质量、支座形式等参数对管桁架结构的动力响应的影响。得到了结构抗爆设计的主要参数及结构的薄弱位置,为确保建筑安全提供理论依据。更多还原

【Abstract】 The large-span spatial structures are very important sites for people’s activity,whose security greatly influences people’s life and property.Due to the serious security situation of the world, the bomb attack and accidental explosion is obviously more than before.If the space structure suffers the blast load, it will be seriously damaged and even collapse.Generally, in China, the reseach of sustainable design and aseismatic design of the building structure is more comprehensive and in-depth. The design of the temporary design and occasional design of the building structure is relatively lag behind, especially for accidental design, For most of the building were not designed for accidental design situation. So the research on dynamic response and failure mode under the blast loads are very meaningful to evaluate the structure’s safety and take the defense measure against accidental explosion and territories’attack.This paper studied a tube-truss of a typical roof structure based on systematic research of dynamic analysis and explosion of tube-truss. To utilize nonlinear dynamic finite element analysis software ANSYS/LS-DYNA, analyzing and discussing effects of dynamic response of tube-truss structure under different ratio of damping, equivalent roof mass, bearing type when explosion hapeened indoor and outdoor. Obtain the main parameters of Explosion Resistance design and the weak position of the structure, to provide a theoretical basis to ensure building safety.更多还原