铁路枢纽单层编织拱壳屋盖连续倒塌分析研究

发布时间：2018-01-15 23:17

本文关键词：铁路枢纽单层编织拱壳屋盖连续倒塌分析研究　出处：《工业建筑》2016年12期 　论文类型：期刊论文

【摘要】：为减少局部构件破坏引起结构连续倒塌的可能性,运用等效荷载瞬时卸载法对一综合交通枢纽中央站房屋盖进行了不同支座失效情况下结构抗连续倒塌的动力分析。利用应力比法分析了站房结构屋盖的重要构件,采用有限元程序ABAQUS对结构进行非线性动力分析,构件破坏判断标准参考美国标准UFC4-023-03的要求。介绍抗连续倒塌动力分析的承载力和变形判定准则,分析在关键构件失效瞬间结构的应力比和变形能否满足设计要求。结果表明:在不同位置支座失效情况下,该屋盖发生了局部破坏,但破坏限制在去除构件周围的一定范围内;边支座失效情况下,结构破坏范围明显加大,但最终破坏仍限制在局部范围,不会造成整体结构的连续坍塌。
[Abstract]:In order to reduce the possibility of continuous collapse caused by local member failure. Using the equivalent load instantaneous unloading method, the dynamic analysis of the continuous collapse of the roof of a central station of a comprehensive transportation hub is carried out under the condition of failure of different supports. The important components of the roof of the station building are analyzed by using the stress ratio method. . The nonlinear dynamic analysis of the structure is carried out by using the finite element program ABAQUS. The criteria for judging the failure of components refer to the requirements of the American standard UFC4-023-03. The criterion for determining the bearing capacity and deformation of the dynamic analysis of continuous collapse is introduced. This paper analyzes whether the stress ratio and deformation of the structure can meet the design requirements at the moment of failure of the key component. The results show that the roof has local failure under the condition of the failure of the support at different positions. However, the damage is limited to a certain extent around the removal of components; Under the condition of side bearing failure, the damage range of the structure is obviously enlarged, but the ultimate damage is still limited to local scope, which will not cause the continuous collapse of the whole structure.
【作者单位】：铁道第三勘察设计院集团有限公司;
【分类号】：TU399;TU312.3
【正文快照】： 大型铁路客站是城市综合交通运输网络的高效运转的重要设施,且具有较大的政治影响,因而在遭遇非预期荷载作用并因局部失效诱致整体结构发生连续性倒塌时,会造成大量的人员伤亡和巨大的财产损失,对其进行防连续倒塌研究是必要的。结构抵抗连续倒塌的设计方法一般可归为事件控制

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