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
发布时间：2019-03-25 18:19
【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。
[Abstract]:The static behavior of concrete-filled square steel tube (CFST)-H-shaped steel beam bolted joint considering the combined action of profiled steel plate and concrete composite floor is studied. Static loading tests were carried out on three full-scale joints without floor, floor compression and floor tension respectively. Through comparative analysis, the mechanical performance of the joints under monotone load was investigated, including initial rotational stiffness. In this paper, the influence of the combined action of the floor under the positive and negative bending moment on the mechanical performance of the slab is studied, such as the ultimate bearing capacity and so on. The results show that the displacement ductility coefficient at the end of the test beam with plate-less joints is more than 2.2, which meets the requirements of seismic design. Compared with pure steel beam, the cross section of composite beam moves up and the axis moves up, the initial rotational stiffness and bearing capacity of the composite joint are greatly improved compared with the joint without slab, and the bearing capacity of the composite joint is much higher than that of the non-slab joint in comparison with the pure steel beam. The load of bolt slip increases and the maximum slip decreases and the shear deformation in the core region of the joint is negligible.
【作者单位】： 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;
【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)
【分类号】：TU398.9
[Abstract]:The static behavior of concrete-filled square steel tube (CFST)-H-shaped steel beam bolted joint considering the combined action of profiled steel plate and concrete composite floor is studied. Static loading tests were carried out on three full-scale joints without floor, floor compression and floor tension respectively. Through comparative analysis, the mechanical performance of the joints under monotone load was investigated, including initial rotational stiffness. In this paper, the influence of the combined action of the floor under the positive and negative bending moment on the mechanical performance of the slab is studied, such as the ultimate bearing capacity and so on. The results show that the displacement ductility coefficient at the end of the test beam with plate-less joints is more than 2.2, which meets the requirements of seismic design. Compared with pure steel beam, the cross section of composite beam moves up and the axis moves up, the initial rotational stiffness and bearing capacity of the composite joint are greatly improved compared with the joint without slab, and the bearing capacity of the composite joint is much higher than that of the non-slab joint in comparison with the pure steel beam. The load of bolt slip increases and the maximum slip decreases and the shear deformation in the core region of the joint is negligible.
【作者单位】： 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;
【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)
【分类号】：TU398.9
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