[1]杨明飞,徐赵东.大跨网壳结构的动力倒塌判别分析[J].东南大学学报(自然科学版),2011,41(4):836-840.[doi:10.3969/j.issn.1001-0505.2011.04.034]
 Yang Mingfei,Xu Zhaodong.Dynamic collapse analysis and judgment for large-span reticulated shell structures[J].Journal of Southeast University (Natural Science Edition),2011,41(4):836-840.[doi:10.3969/j.issn.1001-0505.2011.04.034]
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大跨网壳结构的动力倒塌判别分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第4期
页码:
836-840
栏目:
土木工程
出版日期:
2011-07-20

文章信息/Info

Title:
Dynamic collapse analysis and judgment for large-span reticulated shell structures
作者:
杨明飞12徐赵东1
(1东南大学混凝土及预应力混凝土结构教育部重点实验室,南京 210096)
(2安徽理工大学土木学院,淮南 232001)
Author(s):
Yang Mingfei12Xu Zhaodong1
(1 Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096,China)
(2 School of Civil Engineering, Anhui University of Sicence and Technology, Huainan 232001,China)
关键词:
倒塌模式动力局部失稳动力整体失稳临界荷载施威德勒网壳
Keywords:
collapse model dynamic local buckling dynamic overall buckling critical load Schwedler reticulated shell
分类号:
TU337
DOI:
10.3969/j.issn.1001-0505.2011.04.034
摘要:
为了研究大跨网壳结构的倒塌模式以及判别倒塌过程中各阶段所对应的临界荷载,基于LS-DYNA软件,同时考虑结构的双重非线性和材料的失效应变,对3种典型大跨网壳结构的倒塌过程进行了模拟.根据模拟结果,提出了大跨网壳结构的倒塌模式.参考增量动力分析方法,得到了带肋施威德勒网壳从动态失稳直至倒塌状态所对应的临界荷载,并且分析了地震时程响应、最大顶点位移-地震波峰值加速度和失效杆件数量-地震波峰值加速度曲线,量化了各状态对应的指标.结果表明:与地震波峰值加速度6.2m/s2作用下顶点最大位移相比,动力局部失稳状态,顶点最大位移幅值波动135.9%; 动力整体失稳状态,顶点最大位移幅值波动762.4%; 整体倒塌状态,顶点最大位移幅值波动1768.3%.
Abstract:
In order to study the collapse model and judge the critical loads in the various stages of large-span reticulated shell structures, the collapse process of three typical large-span reticulated shell structures were simulated with the LS-DYNA software considering the factors of the structure double nonlinearity and material failure strain. And then, the collapse mode of large span reticulated shell structures is proposed. Critical loads of Schwedler reticulated shell corresponding with from dynamic buckling to collapse state are obtained by referring incremental dynamic analysis method. Time history earthquake responses, maximum vertex displacement-seismic peak acceleration and the failure number of bars-seismic peak acceleration curve are analyzed, and then the state index is quantified. The state index is quantified. The results suggest that the maximum displacement amplitude fluctuations of vertex are 135. 9%, 762. 4%, 1 768. 3% compared with that of seismic acceleration at 6. 2m/s2 in the case of dynamic local buckling, dynamic overall buckling and overall collapse respectively.

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相似文献/References:

[1]黄兴淮,徐赵东,杨明飞.多维地震下大跨网格结构倒塌分析与抗倒塌措施[J].东南大学学报(自然科学版),2012,42(1):109.[doi:10.3969/j.issn.1001-0505.2012.01.021]
 Huang Xinghuai,Xu Zhaodong,Yang Mingfei.Collapse modes and anti-collapse measures for long span trusses under multi-dimensional earthquakes[J].Journal of Southeast University (Natural Science Edition),2012,42(4):109.[doi:10.3969/j.issn.1001-0505.2012.01.021]

备注/Memo

备注/Memo:
作者简介:杨明飞(1979—),男,博士生;徐赵东(联系人),男,博士,教授,博士生导师,zhdxu@yahoo.com.cn.
基金项目:国家高技术研究发展计划(863计划)资助项目(2009AA03Z106)、教育部“新世纪优秀人才支持计划”资助项目(NCET-06-0472)、江苏省“333”高层次人才培养工程资助项目、常州市国际合作资助项目(CZ2009004).
引文格式: 杨明飞,徐赵东.大跨网壳结构的动力倒塌判别分析[J].东南大学学报:自然科学版,2011,41(4):836-840.[doi:10.3969/j.issn.1001-0505.2011.04.034]
更新日期/Last Update: 2011-07-20