论文部分内容阅读
为了系统研究钢绞线锚入式预制装配混凝土框架节点的抗震性能,对8个预制节点和1个现浇节点的足尺比例试件进行了低周反复荷载试验研究,探讨了预制装配节点的破坏形态、滞回性能、刚度退化以及耗能能力.试验结果表明,在节点核心区设置附加钢筋,能够有效提高节点的承载能力和变形能力,同时可以实现梁端塑性铰外移.加载前期,预制装配节点的滞回环面积较现浇节点小,但随着荷载的继续施加,预制节点的滞回环面积与现浇节点基本相当.这反映了节点的耗能能力在加载前期较现浇节点差,但后期与现浇节点基本相当甚至超过现浇节点.通过对比以上抗震性能发现,钢绞线锚入式预制装配混凝土框架节点能够满足抗震规范的要求.
In order to systematically study the seismic behavior of precast prefabricated RC frame joints, the full-scale test specimens of 8 prefabricated joints and 1 cast-in-place joint were investigated by low cycle repeated loading test. The effects of precast joints The failure mode, the hysteretic behavior, the stiffness degradation and the energy dissipation capacity.The experimental results show that installing additional rebar in the core of the node can effectively increase the bearing capacity and deformation capacity of the node, and at the same time, The area of hysteresis loop of prefabricated assembly nodes is smaller than that of on-site ones, but with the continuous application of load, the area of hysteresis loop of prefabricated nodes is almost the same as that of in-situ nodes, which reflects that the node’s energy dissipation capacity , But the post-in-situ joints are almost equal to or even exceed the in-situ joints.Compared with the above seismic performance, it is found that the prestressed concrete frame anchors with anchorage cables can meet the seismic code requirements.