文章编号：1000-4750(2023)03-0098-09组合楼板钢框架结构的连续倒塌简化模拟王伟1,2，王俊杰1,2(1.同济大学土木工程防灾国家重点实验室，上海200092；2.同济大学建筑工程系，上海200092)摘要：该文借助经过校验的组合楼盖精细模型，建立了组合楼板钢框架结构连续倒塌有限元简化模型，通过与组合楼盖子结构试验对比验证了此简化模型的准确性。采用简化模型，分析了柱子失效位置、结构层数和组合楼板等参数对一个五层组合楼板钢框架原型结构抗连续倒塌性能的影响。分析结果表明：原型结构具有足够的承载力以避免由单个底层柱子失效所导致的结构连续倒塌；除了角柱失效工况外，原型结构的层数变化对结构抗连续倒塌性能的影响可以忽略，而在角柱失效工况下，层间桁架承载机制的贡献会使得原型结构比单层有楼板结构的抗连续倒塌承载力更高；在考虑组合楼板之后，原型结构的抗连续倒塌承载力提升了114%。关键词：连续倒塌；组合楼板；钢框架；组合结构；简化模型中图分类号：TU318文献标志码：Adoi:10.6052/j.issn.1000-4750.2021.08.0679REDUCED-ORDERPROGRESSIVECOLLAPSEMODELINGOFSTEELFRAMEBUILDINGSWITHCOMPOSITESLABSWANGWei1,2,WANGJun-jie1,2(1.StateKeyLaboratoryofDisasterReductioninCivilEngineering,TongjiUniversity,Shanghai200092,China;2.DepartmentofStructuralEngineering,TongjiUniversity,Shanghai200092,China)Abstract:Withtheaidofavalidatedhigh-fidelitycompositefloormodel,areduced-orderfiniteelementmodelofsteel-framedstructureswithcompositeslabswasestablishedforanalyzingthestructuralbehaviorunderprogressivecollapsescenarios.Theaccuracyofthereduced-ordermodelwasvalidatedbycomparingitwithacompositefloorsubstructuretest.Theprogressivecollapseresistanceofafive-storyprototypebuildingwasanalyzedusingthereduced-ordermodel.Theanalysisresultsindicatetheprototypebuildinghassufficientloading-carryingcapacitytopreventtheprogressivecollapsecausedbythefailureofasinglegroundfloorcolumn.Exceptforthecornerlossscenario,thealteringoffloornumberhasaninsignificanteffectontheprogressivecollapsebehavioroftheprototypebuilding.Thepredictedprogressivecollapseresistanceoftheprototypebuildingisimprovedby114%afterconsideringthecontributionofthecompositeslab.Keywords:progressive...
