方钢管钢骨混凝土柱与钢梁端板螺栓连接节点抗震性能试验研究  

Experimental study on seismic behavior of steel-reinforced concrete square column and steel beam joint with bolted end-plate

作　　者：何益斌[1] 黄频[1,2] 郭健[2] 周海兵[1,3] 李毅[1] 李艳[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖南大学设计研究院有限公司,湖南长沙410082 [3]湖南省建筑工程集团,湖南长沙410004

出　　处：《建筑结构学报》2012年第7期116-125,共10页Journal of Building Structures

基　　金：长江学者和创新团队发展计划(IRT0917)

摘　　要：为研究方钢管钢骨混凝土柱与钢梁端板螺栓连接节点的抗震性能,进行了5个节点拟静力试验研究,分析了端板厚度、螺栓直径、混凝土强度和轴压比等因素对承载力、弯矩-转角曲线、耗能能力、承载力衰退、刚度退化、延性以及破坏模式的影响。研究结果表明:方钢管钢骨混凝土柱与钢梁端板螺栓连接节点均属于半刚性节点,初始转动刚度随着端板厚度和螺栓直径增大而提高,但节点的极限转动能力随着端板厚度的增大而减小;当承载力由端板或钢梁控制时,其具有良好的转动和耗能能力;试件承载力退化系数在0.8～1.0之间,变化幅度不大,刚度退化相比荷载退化严重;设计中应避免高强螺栓发生脆性破坏。In order to investigate the seismic behavior tubular column connections, five specimens were tested bolt diameter, concrete strength and axial compression of steel beam to steel-reinforced concrete filled square steel by quasi-static tests. The influences of end-plate thickness, ratio on the load-carrying capacity, moment-rotation curve, energy dissipation capacity, load degradation, rigidity degradation, ductility and ultimate failure modes of end-plate connections were analyzed. The experimental results show that these new type of composite connections belong to the category of semi-rigid connections, and the initial rotational stiffness of connections increase with end-plate thickness and bolt diameter, but the utmost rotational capacity of connections decrease with end-plate thickness. The connection shows excellent behavior in terms of ductility and energy dissipation when the strength of connection is controlled by end-plate or steel beam. The load degradation coefficients of all specimens are between 0. 8 and 1.0, varying within a narrow range. Compared with load degradation, the rigidity of specimens degrades seriously. Moreover, the high strength bolt should avoid brittle failure in the design procedure.

关 键 词：钢-混凝土组合结构 节点 端板螺栓 拟静力试验 抗震性能 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1