钢梁与预制混凝土柱连接节点静力及抗震性能研究  

Research on Static and Seismic Performance of Joints Between Steel Beams and Prefabricated Reinforced Concrete Columns

作　　者：张书航 赵领志 金明昌 芦燕[2,3] 郭浩宇 ZHANG Shuhang;ZHAO Lingzhi;JIN Mingchang;LU Yan;GUO Haoyu(Tianjin Architectural Appraisal&Design Co.,Ltd.,Tianjin 300074,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China;Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration(Tianjin University),Tianjin 300350,China)

机构地区：[1]天津市房屋鉴定建筑设计院有限公司,天津300074 [2]天津大学建筑工程学院,天津300350 [3]中国地震局地震工程综合模拟与城乡抗震韧性重点实验室(天津大学),天津300350

出　　处：《工业建筑》2023年第8期43-51,共9页Industrial Construction

基　　金：国家自然科学基金项目(52022067)。

摘　　要：提出了一种钢梁与预制混凝土柱连接节点,该节点通过方钢管与内部肋板组成的节点环实现钢梁与预制混凝土柱的连接。该节点内部肋板可以采用贯通式或分隔式。对箱形肋板贯通式和分隔式节点足尺试件分别开展了单调和循环加载试验,并采用ABAQUS有限元软件进行数值模拟,研究钢梁与预制混凝土柱连接节点的静力性能及抗震性能。研究结果表明,在单调荷载作用下,箱形肋板贯通式节点钢梁受拉翼缘与节点域方钢管焊缝撕裂,箱形肋板分隔式节点钢梁受压翼缘屈曲形成塑性铰;与箱形肋板贯通式节点相比,箱形肋板分隔式节点的位移延性系数和承载力分别提高了38.24%和22.33%,延性和承载力更高;在循环荷载作用下,两类节点破坏模式均为节点域混凝土承压破坏;加载过程中刚度退化性能稳定;箱形肋板分隔式节点的位移延性系数和能量耗散系数分别提高了21.76%和35.05%,延性和耗能能力更好;建立的有限元模型可以较准确地模拟节点在单调荷载下的静力性能和循环荷载下的抗震性能。A novel type of joint between steel beam and reinforced concrete column was proposed.The joint connected steel beam with prefabricated concrete column through the joint ring composed of square steel tube and ribbed plates.The inner ribbed plates of joint can be integral and separated.The static and seismic ferformance of joint with through-type ribbed plates and joint with separated-type ribbed plates were studied by monotonic and cyclic loading tests on full-scale specimens,and the corresponding ABAQUS finite element simulation was carried out.It was shown that under the monotonic loading,the failure mode of joint with through-type ribbed plates is the tension cracks at the welds of the tension flange of steel beam and square steel tube,and the joint with separated-type ribbed plates was local bucking appeared in the compression flange of steel beam and the plastic hinge formed.Compared with the joint with though-type ribbed plates,the displacement ductility ratio and bearing capacity of the joint with separated-type ribbed plates were increased by 38.24%and 22.33%,the ductility and bearing capacity were better.The failure modes of two joints under the cyclic loading both were the failure of the concrete crushed in the interior part of joint.The stiffness degradation of the joints was stable.The displacement ductility ratio and the energy dissipation coefficient of the joint with separated-type ribbed plates were increased by 21.76%and 35.05%,the ductility and energy dissipating capacity were better.The finite element models could accurately simulate the static behavior of joint under monotonic load,as well as the seismic performance under cyclic load.

关 键 词：梁柱节点 单调加载 循环加载 静力性能 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程] TU398.9