具有自复位功能装配式框架节点抗震性能的影响因素分析

INFLUENCE FACTORS ANALYSIS ON ASEISMIC BEHAVIOR OF PREFABRICATED FRAME JOINTS WITH CAPACITY OF SELF-CENTERING

  • 摘要: 具有自复位功能的装配式框架节点采取一种“干式”拼接方法,通过预应力筋提供自复位能力。为了探明具有自复位功能框架节点抗震性能的影响主要因素,该文运用有限元软件ABAQUS分别以节点预应力筋的张拉应力、预应力筋的数量、节点配筋率等为参数进行了单调加载和低周往复荷载下计算分析。分析结果表明预应力筋数量对自复位预制框架节点抗震性能影响大,张拉应力在一定范围内有明显影响,普通钢筋的配筋率影响较小。研究成果对装配式框架的推广应用有一定指导意义。

     

    Abstract: The precast concrete frame joint with the capacity of self-centering provided by post-tensioned steel uses the dry joint connection method. In order to research the main influence factors on aseismic behavior of prefabricated frame joints with the capacity of self-centering, all relevant references are calculated and simulated on the stage of finite element software ABAQUS with the factors of stretching control stress, the number of post-tensioned steel, and reinforcement ratio, under a monotone load and cyclic loads. The results show that: the number of post-tensioned steel has a greater influence on the aseismic behavior of a structure, and the stretching control stress has influence in a certain range, but the reinforcement ratio has a less influence, and the results have some degree of guiding significance on the popularization of a prefabricated frame.

     

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