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Behavior of corrosion damaged circular reinforced concrete columns under cyclic loading

机译：循环荷载作用下锈蚀圆形钢筋混凝土柱的受力性能

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摘要

This paper presents the results of an investigation on degradation of seismic performance of reinforced concrete (RC) columns damaged by reinforcement corrosion. A total of 13 reinforced concrete circular columns were tested under combined cyclic lateral displacement excursions and constant axial load after being subjected to accelerated corrosion tests. The controlled variables in the test were corrosion level and axial load ratio. The steel corrosion loss ratios ranged from 0% to 15.1 %, and the axial load ratios varied from 0.15 to 0.9. Based on the test results, degradation models for loading capacity, stiffness, ductility and energy dissipation capacity of columns were proposed. Test results show that higher corrosion levels and higher axial loads result in less stable hysteretic loops with more severe strength and stiffness degradations and worse ductility, and that the energy dissipation of corroded specimens at the same displacement excursions is approximately the same as that of control specimens, regardless of the corrosion level, when the rebar corrosion loss ratio is less than 14%.
机译：本文介绍了由于钢筋腐蚀而受损的钢筋混凝土（RC）柱抗震性能下降的研究结果。在进行加速腐蚀试验后，总共13根钢筋混凝土圆柱在循环横向位移偏移和恒定轴向载荷的作用下进行了测试。试验中的控制变量是腐蚀水平和轴向载荷比。钢的腐蚀损失率在0％至15.1％的范围内，轴向载荷率在0.15至0.9的范围内变化。根据试验结果，提出了承载能力，刚度，延性和能量耗散能力的退化模型。测试结果表明，较高的腐蚀水平和较高的轴向载荷会导致磁滞回线的稳定性降低，强度和刚度退化更严重，延展性更差，并且在相同位移偏移下，腐蚀试样的能量耗散与对照试样的能耗大致相同。 ，无论腐蚀水平如何，当钢筋的腐蚀损失率小于14％时。

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  • 来源
    《Construction and Building Materials》 |2012年第2012期|p.548-556|共9页
  • 作者

    Ying Ma; Yi Che; Jinxin Gong;

  • 作者单位

    State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian City, Liaoning Province 116024, C hina,School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450011. China;

    State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian City, Liaoning Province 116024, C hina;

    State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian City, Liaoning Province 116024, C hina;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    reinforced concrete; circular column; corrosion; axial load; seismic behavior; cyclic loading; ductility; energy dissipation;

    机译：钢筋混凝土圆柱腐蚀;轴向载荷地震行为;循环加载延展性能量耗散;

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