带外肋环板钢管混凝土梁柱节点抗震性能研究  

Experimental research on seismic behavior of concrete filled steel tubular beam-column joints with vertical stiffener

作　　者：戎贤 胡珊珊 张健新 杜颜胜 Rong Xian;Hu Shanshan;Zhang Jianxin;Du Yansheng(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学,土木与交通学院,天津300401

出　　处：《建筑科学》2020年第3期73-80,共8页Building Science

基　　金：河北省自然科学基金项目(E2018202290、E2017202278)。

摘　　要：为了研究带外肋环板方钢管混凝土柱-H型钢梁下栓上焊节点抗震性能,进行了4个方钢管柱-钢梁足尺试件的拟静力试验。通过研究节点试件的弯矩-转角滞回曲线、骨架曲线,进一步分析节点的刚度退化、承载力、强度退化、残余变形、耗能能力和累积损伤等抗震性能。研究结果表明:节点受力过程中经历了弹性、弹塑性和塑性的阶段;栓焊连接的节点形式比全螺栓节点的残余变形和累计损伤分别降低60%和51%,同时节点的耗能能力和刚度得到提高;钢管混凝土柱节点比空钢管柱节点的极限弯矩提高了11.2%,同时降低了节点的累积损伤;柱内无隔板的节点与隔板贯通节点各项性能指标相近。可见在实际设计中,适当采用栓焊连接或者填充混凝土可以提高节点的抗震性能。In order to study the seismic behavior of the bottom flange bolted and top flange welded connection between rectangular concrete filled tube column and H-shaped steel beam joints with vertical stiffener,four fullscale specimens are tested under low-frequency cyclic loading. By studying the moment-roation hysteresis curves and skeleton curves of the joint specimens,the seismic performance of the joint specimens is further analyzed,such as stiffness degradation,bearing capacity,strength degradation,residual deformation,energy dissipation capacity and cumulative damage. The results show that: the joint specimens has experienced elastic,elastic-plastic and plastic stages in the process of stress;the bolt-welded joint is reduced by 60% and 51% respectively than the residual deformation and cumulative damage of the full bolt joint,and the energy dissipation capacity and rigidity of the joint are improved. The ultimate bending moment of concrete-filled steel tubular column joints is 11. 2% higher than that of empty steel tubular column joints,at the same time,the cumulative damage of the joints is reduced;the performance indexes of the joint without the diaphragm in the column is similar to that of the diaphragm through joint. In practical design,the seismic performance of joints can be improved by increasing the strength of concrete or adopting bolt-welded joints appropriately.

关 键 词：方钢管混凝土柱 外肋环板 隔板贯通 下栓上焊 抗震性能 

分 类 号：TU398.9[建筑科学—结构工程] TU352.1