爆炸荷载作用下钢框架结构的连续性倒塌分析
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摘要
利用ANSYS/LS-DYNA有限元程序研究爆炸荷载作用下钢框架结构的连续性倒塌机理,主要针对三层两跨钢框架结构进行分析,总结多层钢框架结构在不同工况条件下的倒塌规律。利用相关规范提出的拉结构件法对结构进行加强设计,验证了多层钢框架结构在多柱破坏情况下拉结构件法的有效性。多柱破坏时,可以通过合理拉结设计有效避免结构发生连续性倒塌,为实际工程中如何利用拉结构件法进行加强设计提供了理论参考。
The mechanism of progressive collapse of steel frames under blast loading was performed by using ANSYS / LS-DYNA finite element analysis software.By considering three layer two span steel frames as subject,the mechanism of progressive collapse of multi-story steel frames in which many columns were destroyed were analyzed.And the regularities of progressive collapse of multi-story steel frames under different working conditions were summarized.The structure can be strengthened by using the tying intension method and the effectiveness in conditions of some columns destroyed is proved.When some columns are destroyed,the progressive collapse of multi-story steel frames can be prevented through the suitable tying intension method,which provides a theory reference for the practical engineering.
The mechanism of progressive collapse of steel frames under blast loading was performed by using ANSYS / LS-DYNA finite element analysis software.By considering three layer two span steel frames as subject,the mechanism of progressive collapse of multi-story steel frames in which many columns were destroyed were analyzed.And the regularities of progressive collapse of multi-story steel frames under different working conditions were summarized.The structure can be strengthened by using the tying intension method and the effectiveness in conditions of some columns destroyed is proved.When some columns are destroyed,the progressive collapse of multi-story steel frames can be prevented through the suitable tying intension method,which provides a theory reference for the practical engineering.
引文
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[3]于山,苏幼坡.钢筋混凝土建筑抗倒塌设计[J].地震工程与工程振动,2005,25(5):89-92.
[4]尹敏达.轻型钢结构房屋新技术与新产品的应用[M].北京:中国建筑工业出版社,2011:1-5.
[5]宋拓,吕令毅.爆炸冲击对多层钢框架连续倒塌性能的影响[J].东南大学学报,2011,41(6):1247-1252.
[6]李忠献,刘志侠.爆炸荷载作用下钢结构的动力响应与破坏模式[J].建筑结构学报,2008,29(4):106-111.
[7]中华人民共和国国家标准GB50010-2010,混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.
[8]中华人民共和国国家标准JGJ3-2010,高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.
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