组合楼板钢框架结构的连续倒塌简化模拟  

REDUCED-ORDER PROGRESSIVE COLLAPSE MODELING OF STEEL FRAME BUILDINGS WITH COMPOSITE SLABS

作　　者：王伟[1,2] 王俊杰[1,2] WANG Wei;WANG Jun-jie(State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Department of Structural Engineering,Tongji University,Shanghai 200092,China)

机构地区：[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

出　　处：《工程力学》2023年第3期98-106,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(51820105013);土木工程防灾国家重点实验室基金重点项目(SLDRCE19-A-03)。

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%。With the aid of a validated high-fidelity composite floor model,a reduced-order finite element model of steel-framed structures with composite slabs was established for analyzing the structural behavior under progressive collapse scenarios.The accuracy of the reduced-order model was validated by comparing it with a composite floor substructure test.The progressive collapse resistance of a five-story prototype building was analyzed using the reduced-order model.The analysis results indicate the prototype building has sufficient loading-carrying capacity to prevent the progressive collapse caused by the failure of a single ground floor column.Except for the corner loss scenario,the altering of floor number has an insignificant effect on the progressive collapse behavior of the prototype building.The predicted progressive collapse resistance of the prototype building is improved by 114%after considering the contribution of the composite slab.

关 键 词：连续倒塌 组合楼板 钢框架 组合结构 简化模型 

分 类 号：TU318[建筑科学—结构工程]