蜂窝梁柱子结构抗连续性倒塌性能研究  

Study on Progressive Collapse Resistance of Castellated Beam-Column Substructure

作　　者：贾连光[1] 李鹏宇 刘洋 王春刚[1] JIA Lianguang;LI Pengyu;LIU Yang;WANG Chungang(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;School of Civil Engineering,Shenyang Urban Construction University,Shenyang,China,110167)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]沈阳城市建设学院土木工程学院,辽宁沈阳110167

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第4期608-616,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51978422)。

摘　　要：目的研究蜂窝梁柱子结构的抗连续性倒塌性能,为工程应用提供设计依据。方法基于拆除构件法,应用ABAQUS有限元分析软件建立蜂窝梁柱子结构与实腹梁柱子结构模拟模型,研究在中柱失效作用下的结构性能,分析孔型、开孔率和首孔距离等参数对蜂窝梁柱子结构抗连续性倒塌性能的影响。结果蜂窝梁柱子结构相比于实腹梁柱子结构的峰值承载力增长64.26%,所对应的位移增长73.57%;蜂窝梁良好的成铰机制使悬链线效应发展更充分;孔型、开孔率、首孔距离对其破坏模式、峰值荷载、悬链线效应发展程度均具有一定影响。结论蜂窝梁柱子结构具有良好的抗连续性倒塌能力,孔型宜为圆形或六边形,开孔率宜取40%~60%,首孔距离宜取0.75~1.0倍梁截面高度。In order to study the progress collapse resistance of castellated beam-column substructure and provide design basis for engineering application,the finite element analysis software ABAQUS was used to carry out static loading on the castellated beam-column substructure and the solid beam-column substructure based on the alternate path method.The progress collapse resistance of the castellated beam-column substructure under the column loss and the influence of different parameters on the progress collapse resistance of the castellated beam-column substructure were studied.The peak load of castellated beam-column substructure increases by 64.26%and the corresponding displacement increases by 73.57%compared with that of solid beam-column substructure.The catenary effect develops more fully.The failure mode,peak load and catenary effect are affected by the opening type,opening rate and first hole distance.Castellated beam-column substructure has good progress collapse resistance ability.In order to ensure its good progress collapse resistance performance,circular hole and hexagonal hole should be selected as the opening type,the opening rate should be 40%-60%,and the first hole distance should be 0.75-1.0 times the beam section height.

关 键 词：蜂窝梁柱子结构 抗力机制 塑性铰 悬链线效应 连续倒塌 

分 类 号：TU398.1[建筑科学—结构工程]