方钢管混凝土柱-H形钢梁螺栓连接节点受力性能试验研究  

Experimental study on mechanical performance of concrete-filled square steel tubular columns to H-section steel beam bolted connection

作　　者：张爱林[1] 孙勇[1] 刘学春[1] 詹欣欣 李超[1] 

机构地区：[1]北京工业大学北京市高层和大跨度预应力钢结构工程技术研究中心,北京100022

出　　处：《建筑结构学报》2017年第11期64-73,共10页Journal of Building Structures

基　　金：国家重点研发计划(2016YFC0701503);国家自然科学基金项目(51678010);北京市自然科学基金面上项目(8172009)

摘　　要：进行了考虑压型钢板-混凝土组合楼板组合作用的方钢管混凝土柱-H形钢梁螺栓连接节点的静力性能试验研究。分别对无楼板、楼板受压、楼板受拉的3个足尺节点试件进行了静力加载试验,通过对比分析,考察了节点在单调荷载作用下的受力性能,包括初始转动刚度、极限承载能力等,研究了正、负弯矩作用下楼板组合作用对其受力性能的影响。研究结果表明:无板节点试件梁端位移延性系数达到2.2以上,满足抗震设计要求;组合节点和无板节点受力性能差别明显,相比于纯钢梁,组合梁横截面中和轴上移,组合节点的初始转动刚度、承载力与无楼板节点相比均有大幅度提高;组合节点螺栓开始滑移的荷载增大,最大滑移量减小;节点核心区剪切变形可忽略不计。Taking the effect of composite action of profiled steel sheet-concrete slabs into consideration,experimental research on the static performance of the concrete-filled square steel tubular column to H-section steel beam bolted connection was carried out. Static loading tests were performed on three full scale specimens under the circumstances of no-floor slab,floor slab under pressure,floor slab under tension,to investigate the mechanical properties of the connections under monotonic loading,such as the initial rotational stiffness and ultimate bearing capacity,etc. The effect of composite action of floor slabs on its mechanical performance under the positive and negative bending moments was also studied. The results show that the beam-end displacement ductility coefficient of the no-board joint specimen is beyond 2. 2,which satisfies the seismic design requirement. The performance difference between composite joints and no-board joints is obvious. Compared to the pure steel beam,the neutral axis of composite beam cross section moves up, and the initial rotational stiffness and ultimate bearing capacity of composite joints are increased significantly. The time of bolt starting sliding at composite joints is delayed,and the maximum slippage decreases. The shear deformation of joint core area can be ignored.

关 键 词：方钢管混凝土柱 梁柱螺栓连接节点 楼板组合作用 静力试验 受力性能 

分 类 号：TU398.903[建筑科学—结构工程]