钢绞线锚入式预制装配混凝土框架节点抗震试验研究

发布时间：2018-01-06 19:32

本文关键词：钢绞线锚入式预制装配混凝土框架节点抗震试验研究　出处：《东南大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：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.
[Abstract]:In order to systematically study the seismic behavior of steel strands anchor in precast concrete frame joints, the full-scale scale specimens of 8 prefabricated joints and 1 cast-in-situ joint were tested under low-cycle repeated loading. The failure form, hysteretic performance, stiffness degradation and energy dissipation capacity of prefabricated assembly joints are discussed. The experimental results show that the load carrying capacity and deformation capacity of the joints can be effectively improved by setting additional steel bars in the core area of the joints. At the same time, the plastic hinge of beam end can be moved out. In the early stage of loading, the hysteresis loop area of prefabricated assembly joints is smaller than that of cast-in-place joints, but the load continues to be applied. The hysteretic loop area of prefabricated joints is basically the same as that of cast-in-place joints, which reflects that the energy dissipation capacity of prefabricated joints is worse than that of cast-in-place joints in the early stage of loading. By comparing the seismic behavior above, it is found that the steel strands anchor type precast concrete frame joints can meet the requirements of seismic code.
【作者单位】：扬州大学建筑科学与工程学院;东南大学土木工程学院;
【基金】：国家重点研发计划资助项目(2016YFC0701703)
【分类号】：TU352.11;TU375.4
【正文快照】： 国内外关于预制装配式混凝土结构的研究主要集中在构件节点连接方式、接合部受力性能以及不同连接方式下装配式结构整体抗震性能方面.连接方式是预制装配式混凝土结构的核心技术[1],预制混凝土结构的试验研究和震害调查表明,只要预制构件的接合部位有可靠的连接,预制混凝土结

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