基于带肋角钢的装配混凝土柱-钢梁连接节点抗震性能试验研究  

Experimental study on seismic behavior of assembled concrete column-steel beam joint based on angle steel with ribs

作　　者：舒兴平[1] 张晗 张再华[2] SHU Xingping;ZHANG Han;ZHANG Zaihua(Institute of steel structure,College of Civil Engineering,Hunan University,Changsha 410082,China;School of Civil Engineering,Hunan City University,Yiyang 413000,China)

机构地区：[1]湖南大学土木工程学院钢结构研究所,湖南长沙410082 [2]湖南城市学院土木工程学院,湖南益阳410075

出　　处：《铁道科学与工程学报》2020年第10期2626-2634,共9页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(5177081911)。

摘　　要：为研究基于带肋角钢的装配混凝土柱−钢梁连接节点的抗震性能,设计制作4个框架中部十字型梁柱节点试件并进行拟静力试验研究。分析梁柱截面尺寸,梁端螺栓数量以及角钢尺寸等因素对承载力、耗能能力、强度退化、刚度退化、延性以及破坏模式的影响。研究结果表明:低周往复荷载作用下该类型节点的破坏模式以混凝土核心区受剪破坏为主,同时角钢加劲肋及钢梁发生了不同程度屈曲。试件滞回曲线呈现出与现钢筋凝土节点相似的捏缩现象,试件延性及耗能能力略高于钢筋混凝土节点。所有试件强度退化系数变化幅度较小,在0.8~1.0之间。该节点具有良好的承载力,耗能能力以及延性,但需要对节点核心区混凝土承载力进行进一步优化。In order to study the seismic behavior of the assembled concrete column steel beam joint based on the angle steel with ribs,four specimens of cross beam column joint in the middle of the frame were designed and manufactured,and the quasi-static test was carried out.The influences of the beam column section size,the number of bolts at the beam end and the angle steel size on the bearing capacity,energy consumption capacity,strength degradation,stiffness degradation,ductility and failure mode were analyzed。The results show that the failure mode of this type of joint is mainly shear failure in the core area of concrete under the action of low cycle reciprocating load,and the angle steel stiffener and steel beam have different degrees of buckling.The hysteretic curve of the test piece shows similar pinching phenomenon with the existing reinforced concrete joint,and the ductility and energy consumption capacity of the test piece is slightly higher than that of the reinforced concrete joint.The change range of strength degradation coefficient of all specimens is small,ranging from 0.8 to 1.0.The joint has good bearing capacity,energy dissipation capacity and ductility,but the bearing capacity of concrete in the core area of the joint needs to be further optimized.

关 键 词：装配式混合结构 带肋顶底角钢 框架中柱节点 拟静力试验 抗震性能 

分 类 号：TU398[建筑科学—结构工程]