T形钢管混凝土组合柱-钢筋混凝土梁外伸端板连接节点抗震性能试验研究  

Experimental Research on Seismic Performance of Extended-end-plate Connecting Joint Between T-shaped Concrete-filled Steel Tubular Composite Column and Reinforced Concrete Beam

作　　者：彭忠[1] 戴绍斌[1] 刘记雄[1] 张逸超[1] 

机构地区：[1]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《四川大学学报（工程科学版）》2016年第4期70-77,共8页Journal of Sichuan University (Engineering Science Edition)

基　　金：湖北省自然科学基金资助项目(2012FFB05112)

摘　　要：为研究T形钢管混凝土组合柱-钢筋混凝土梁外伸端板连接节点的抗震性能,按1∶2的比例设计并制作9个试件进行低周往复荷载试验,观察试件受力过程和破坏形态,得到试件的滞回曲线和骨架曲线,分析节点的荷载特征值、延性、耗能性能和刚度退化。结果表明:此类节点滞回曲线饱满,延性系数均大于3.48,黏滞阻尼系数均大于1.5,具有良好的抗震性能;增加牛腿长度能提高节点的初始刚度和极限荷载;增加端板厚度和设置加劲肋,节点的极限荷载和耗能性能提高,且加劲肋对薄端板的影响比厚端板显著;增大螺栓直径能提高初始刚度,但对节点承载力影响有限。In order to study the seismic performance of extended-end-plate connecting joint between T-shaped concrete-filled steel tubu- lar composite column and reinforced concrete beam, nine specimens were designed and manufactured. Moreover, low-cyclic repetitive loading experiments were carried out. Based on damage process and failure mode observed, hysteresis curves and skeleton curves were described, and the load characteristics, ductility, energy dissipation and stiffness degradation of the joints were analyzed. Results showed that this type of joint has plumper hysteretic curve with ductility coefficient greater than 3.48 and viscous damping coefficient greater than 1.5, which indicates excellent seismic performance. With lengthened corbel, initial stiffness and ultimate load of the joint are im- proved. With thickened end-plate and added stiffener, ultimate load and energy dissipation of the joint are improved, and the effect of stiffener on thin end-plate is more distinct than that of thick stiffener. With increased bolt diameter, initial stiffness of the joint＇ is irhproved, but the influence of bolt diameter on bearing capacity is limited.

关 键 词：T形钢管混凝土组合柱 外伸端板连接节点 拟静力试验 抗震性能 

分 类 号：TU311[建筑科学—结构工程]