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Development of bond deterioration model in corroded RC member for discrete analysis model

机译：锈蚀钢筋混凝土构件粘结退化模型离散分析模型的建立

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摘要

1.The simulation system for evaluating the residual capacity of corroded RC beam considering the effects of the rust expansion, the bond deterioration, the rebar reduction, and the non-uniformity of corrosion pattern is developed. 2. The constitutive models of the bond deterioration by corrosion were reasonably developed based on the designed experiment. To extract the changing of the friction bond and the mechanical bond, the pull-out experiment program of concrete specimens reinforced with corroded round bar and corroded deformed bar at different corrosion percentage without corrosion cracking damage, were performed. The new constitutive model of shear spring and normal spring were proposed based on the changing of maximum pull-out capacities at different corrosion degree. 3. To validate the applicability of the new constitutive model, the corroded RC beam simulation were carried out using the new constitutive model. The simulation results show the reasonable results comparing with the experiment. The stiffness reduction and the residual capacity of corroded beam due to the initial damage from corrosion were simulated well. The non-uniform corrosion simulation showed the similar failure pattern as the experimental result.
机译：1.开发了一种考虑锈蚀膨胀，粘结变质，钢筋减少和腐蚀方式不均匀性影响的腐蚀RC梁残余承载力仿真系统。 2.在设计实验的基础上，合理建立了腐蚀引起的结合破坏本构模型。为了提取摩擦结合和机械结合的变化，进行了锈蚀圆棒和锈蚀变形棒在不同腐蚀百分数下无腐蚀裂纹破坏的钢筋混凝土试件的拔出试验程序。根据不同腐蚀程度下最大拉拔能力的变化，提出了剪切弹簧和普通弹簧的本构模型。 3.为了验证新的本构模型的适用性，使用新的本构模型进行了腐蚀后的RC梁模拟。仿真结果表明与实验比较合理。很好地模拟了刚度降低和腐蚀引起的初始损伤导致的腐蚀梁的剩余承载力。非均匀腐蚀模拟显示出与实验结果相似的破坏模式。

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  • 来源
    《生産研究》 |2019年第4期|85-90|共6页
  • 作者

    Kohei NAGAI; Punyawut JIRADILOK; Koji MATSUMOTO;

  • 作者单位

    Institute of Industrial Science The University of Tokyo Japan;

    Faculty of Engineering Hokkaido University Japan;

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  • 正文语种 eng
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