摘要
为研究模块化钢结构顶板连接楼盖平面内受力性能,设计并制作了3种不同顶板连接方式的楼盖。通过平面内低周循环加载试验,研究顶板连接楼盖的滞回特性、承载能力、位移延性、变形特征和刚度退化等力学性能及破坏模式,分析了不同连接节点的力学传递机制,揭示了顶板连接楼盖平面内受力机理。结果表明:螺栓-盖板连接节点可以有效约束模块间的相对变形,减轻角柱节点处水平连接板的破坏程度,提升模块化钢结构的协同工作性能;该连接节点具有良好的传力能力,显著增强了非连续楼盖的平面内承载力、延性和刚度,但其耗能能力相对有限;顶板连接楼盖整体呈典型的剪切变形模式,难以满足刚性楼盖假设。基于试验与理论分析,提出了螺栓-盖板连接的设计建议和刚度计算方法,为模块化钢结构顶板连接楼盖的理论研究和工程应用提供了科学依据。
To investigate the in-plane mechanical behavior of roof-connected diaphragms in modular steel buildings,three diaphragms with different roof connection types were designed and fabricated.In-plane low-cycle loading tests were conducted to study their hysteretic characteristics,load-bearing capacity,displacement ductility,deformation patterns,stiffness degradation,and failure modes.The load-transfer mechanisms of different roof connections were analyzed,and the in-plane mechanical behavior of roof-connected diaphragms was revealed.The results indicate that the bolted cover plate connection can effectively restrain relative deformation between adjacent modules,alleviates damage to horizontal connecting plates at corner column joints,and improves the overall cooperative performance of modular steel buildings.This connection exhibits strong load-transfer capability and significantly enhances the in-plane capacity,ductility,and stiffness of discontinuous diaphragms,although its energy dissipation capacity remains relatively limited.The overall deformation mode of the roof-connected diaphragms presents a typical shear deformation pattern,making it difficult to satisfy the rigid diaphragm assumption.Based on experimental and theoretical analysis,design suggestions and stiffness calculation methods for bolted cover plate connections were proposed,providing a scientific basis for the theoretical study and engineering application of roof-connected diaphragms in modular steel buildings.
作者
史奉伟
丁阳
宗亮
SHI Fengwei;DING Yang;ZONG Liang(School of Civil Engineering,Tianjin University,Tianjin 300072,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China;Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science and Technology,Qingdao 266590,China;Key Laboratory of Coast Civil Structure Safety,Ministry of Education(Tianjin University),Tianjin 300072,China)
出处
《建筑结构学报》
北大核心
2025年第8期269-281,共13页
Journal of Building Structures
基金
国家自然科学基金项目(51978456)
山东省自然科学基金项目(ZR2024QE480)
国家资助博士后研究人员计划(GZC20231497)
青岛市自然科学基金项目(24-4-4-zrjj-75-jch)。
关键词
模块化钢结构
顶板连接楼盖
平面内受力性能
低周循环加载试验
滞回特性
modular steel building
roof-connected diaphragm
in-plane mechanical behavior
low-cycle loading test
hysteretic characteristic
