东南大学学报（自然科学版）2011，Vol.41Issue(4)：836-840,5.DOI:10.3969/j.issn.1001-0505.2011.04.034
大跨网壳结构的动力倒塌判别分析
Dynamic collapse analysis and judgment for large-span reticulated shell structures
摘要
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 6.2 m/s2 in the case of dynamic local buckling, dynamic overall buckling and overall collapse respectively.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Key words
collapse model/ dynamic local buckling/ dynamic overall buckling/ critical load/ Schwedler reticulated shell分类
建筑与水利引用本文复制引用
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):836-840,5.基金项目
国家高技术研究发展计划(863计划)资助项目(2009AA03Z106) （863计划）
教育部“新世纪优秀人才支持计划”资助项目(NCET-06-0472) （NCET-06-0472）
江苏省“333”高层次人才培养工程资助项目 （）
常州市固际合作资助项目(CZ2009004). （CZ2009004）
