学术论文

      钢绞线锚入式预制装配混凝土框架节点抗震试验研究

      Seismic experimental study on strands anchoredprecast concrete frame connections

      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 study the seismic performance of precast concrete connections of anchored prestressing strands in frame, the low-cycle reversed loading test was conducted on eight full-scale precast connections and one cast-in-place connection.The failure mechanism, hysteretic behavior, stiffness degradation and energy dissipation capacity of the precast connections were discussed.The experimental results show that additional reinforcement arranged in the core region can effectively enhance the bearing capacity and deformation capacity of the connections, while the plastic hinge of the beam can also be moved toward outside.In pre-loading, the hysteresis loop area of precast connections is smaller than that of cast-in-place connection, but as the loading continued to be applied, the hysteresis loop area of precast connections is almost equal to that of cast-in-place connection.It can be concluded that the energy dissipation capacity of precast connections is poorer than that of cast-in-place connection in the preliminary stage, however, the energy consumption is equal to or even more than the cast-in-place connection in the later stage.Through the comparison of the above seismic performance, it is found that the precast concrete connection of anchored prestressing strands in the frame can satisfy the requirements of the seismic code.
      作者: 于建兵 [1] 郭正兴 [2]
      Author: Yu Jianbing [1] Guo Zhengxing [2]
      作者单位: 扬州大学建筑科学与工程学院, 扬州 225127;东南大学土木工程学院, 南京 210096 东南大学土木工程学院,南京,210096
      年,卷(期): 2017, 47(4)
      分类号: TU317.1 TU398.2
      在线出版日期: 2017年8月15日
      基金项目: 国家重点研发计划资助项目