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无黏结后张预制混凝土梁柱自复位节点基本力学特性分析

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Keywords: 预制混凝土,自复位节点,承载能力,残余变形,无黏结后张预应力筋

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Abstract:

利用高强无黏结预应力筋连接预制梁、柱以抵抗弯矩和提供自复位能力,构造了一种无黏结后张预制钢筋混凝土梁柱自复位节点,利用通用有限元软件对不同设计参数的5个这种节点在单调加载及往复加载工况下进行了数值分析,重点研究了节点的弯矩-转角特性,对初始后张预应力值、预制梁的配筋率及梁端三角箍筋和后张预应力筋的偏心距等主要参数的影响进行了讨论,同时对节点的自复位性能也进行了探讨。分析结果表明,这种新型节点具有足够的强度和刚度,并具有良好的自复位性能;在4%的侧移水平下,柱及梁的绝大部分均保持弹性。

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