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首页> 外文期刊>Materials and structures >Effect of chloride-induced corrosion on the bond behaviors between steel strands and concrete
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Effect of chloride-induced corrosion on the bond behaviors between steel strands and concrete

机译：氯化物诱导腐蚀对钢绞线和混凝土粘合行为的影响

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摘要

The corrosion of steel strands due to the chloride contamination is one of the most common causes for the degradation of prestressed concrete infrastructure. In this paper, an experimental study was performed to investigate the bond behaviors between steel strands and concrete after suffered the chloride corrosion. Total twenty central and off-center pull-out specimens with different corrosion levels were prepared and tested, in which the electrochemical acceleration method was employed to induce various corrosion levels. The effects of corrosion rate, stirrup configuration and holding condition of concrete to the steel strands on the bond behaviors of steel strands were studied and compared, in terms of the failure mode, bond-slip relationship, bond strength, and bond toughness. The results show that both the ultimate bond strength and characteristic bond strength decreased with the increase of corrosion degree. The presence of stirrups can significantly enhance the bond performance, indicating the more ductile failure characteristic and increased bond toughness. Moreover, the prediction results using empirical and analytical models are also compared with the experimental results to verify their applicability and accuracies in predicting the bond strength of steel strands after corrosion.
机译：由于氯化物污染导致的钢绞线是最常见的预应力混凝土基础设施的原因之一。在本文中，进行了实验研究，以研究遭受氯化物腐蚀后钢绞线和混凝土之间的债券行为。制备和测试具有不同腐蚀水平的二十个中央和偏离中心拉出标本，其中使用电化学加速法诱导各种腐蚀水平。研究了腐蚀速率，混凝土混凝土对钢绞线的钢绞线的影响，并比较了钢绞线的粘合行为，就失效模式，粘结性关系，粘合强度和粘合韧性而比较。结果表明，随着腐蚀程度的增加，终极粘结强度和特征粘合强度均降低。搅拌的存在可以显着提高粘合性能，表明延展性失效特征和增加的粘合性韧性。此外，还将使用经验和分析模型的预测结果与实验结果进行了比较，以验证其适用性和准确性在腐蚀后预测钢绞线的粘合强度。

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  • 来源
    《Materials and structures》 |2021年第3期|129.1-129.16|共16页
  • 作者

    Lu Zhao-Hui; Wu Shi-Yu; Tang Zhuo; Zhao Yan-Gang; Li Wengui;

  • 作者单位

    Beijing Univ Technol Minist Educ Key Lab Urban Secur & Disaster Engn Beijing 100124 Peoples R China|Cent South Univ Sch Civil Engn Changsha 410075 Hunan Peoples R China;

    Beijing Univ Technol Minist Educ Key Lab Urban Secur & Disaster Engn Beijing 100124 Peoples R China;

    Univ Technol Sydney Sch Civil & Environm Engn Sydney NSW 2007 Australia;

    Beijing Univ Technol Minist Educ Key Lab Urban Secur & Disaster Engn Beijing 100124 Peoples R China|Kanagawa Univ Dept Architecture Kanagawa Ku 3-27-1 Rokkakubashi Yokohama Kanagawa 2218686 Japan;

    Univ Technol Sydney Sch Civil & Environm Engn Sydney NSW 2007 Australia;

  • 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

    Steel strands; Concrete; Bond behavior; Pull-out test; Chloride corrosion;

    机译：钢绞线;混凝土;债券行为;拉出试验;氯化物腐蚀;

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