新型钢管混凝土梁柱节点力学性能试验研究  

Experimental study on mechanical properties of new concrete⁃filled steel tubular beam⁃column joints

作　　者：张晓光[1,2] 曹国旭 黄远 李乾坤[4] ZHANG Xiaoguang;CAO Guoxu;HUANG Yuan;LI Qiankun(Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Guangzhou Metro Design Institute Co.,Ltd.,Guangzhou 510010,China;Department of Civil Engineering,Hunan University,Changsha 410082,China;Xuzhou Metro Group Co.,Ltd.,Xuzhou 221004,China)

机构地区：[1]清华大学土木工程系,北京100084 [2]广州地铁设计院股份有限公司,广州510010 [3]湖南大学土木工程系,长沙410082 [4]徐州地铁集团有限公司,徐州221004

出　　处：《建筑结构》2024年第3期1-6,共6页Building Structure

基　　金：国家自然科学基金重大项目(51890903)。

摘　　要：为研究内加强环式圆钢管混凝土柱与矩形钢管混凝土梁这种新型连接节点的力学性能,设计了缩尺钢管混凝土梁柱节点试件,开展了相同梁柱节点试件的静力加载试验和低周往复加载试验。通过研究该节点试件的破坏模式、荷载-位移曲线以及拟静力加载试验的骨架曲线、核心区剪切变形等,分析了节点试件的承载能力、延性和耗能能力,全面考察了同一梁柱节点在静力加载和低周往复加载两种工况下的受力性能和破坏模式。结果表明:钢管混凝土梁柱节点试件核心区强度较强,破坏模式主要为梁端破坏,低周往复加载试验时试件梁柱连接处附近的梁端钢板发生拉裂破坏和钢板鼓曲,静力加载试验时试件梁端焊缝发生拉裂破坏;试件延性较好,加载过程中经历了弹性、弹塑性和塑性发展阶段。最后提出了该类钢管混凝土梁柱节点核心区的抗剪强度计算公式。In order to study the mechanical properties of a new type of joint between a concrete⁃filled steel tubular column and a rectangular concrete⁃filled steel tubular beam with internal reinforcement plate,the specimens of the reduced size concrete⁃filled steel tubular beam⁃column joints were designed,and the static loading test and low⁃cycle reciprocating loading test of the same beam⁃column joints were carried out.By studying the failure modes and load⁃displacement curves of the joint specimens and skeleton curve and core shear deformation of pseudo⁃static loading test,the bearing capacity,ductility and energy dissipation capacity were analyzed,and the mechanical performance and failure mode of same beam⁃column joint under static loading and low⁃cycle reciprocating loading conditions were comprehensively investigated.The results showed that the core area of the concrete filled⁃steel tubular beam⁃column joint specimens had strong strength,and the failure modes are mainly the failure of beam end.The steel plate at the end of the beam near the beam⁃column connection is cracked and buckled in the low⁃cycle reciprocating loading test,and the weld at the beam end are cracked in the static loading test.The specimens had good ductility and experienced elastic,elastoplastic and plastic development stages during loading.Finally,the calculation formula of the shear strength in the core area of the concrete⁃filled steel tubular beam⁃column joint was presented.

关 键 词：钢管混凝土梁柱节点 内隔板 静力加载试验 低周往复加载试验 受力性能 设计方法 

分 类 号：TU398[建筑科学—结构工程]