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Research on corrosion and fatigue performance of weathering steel and High-Performance steel for bridges

机译：钻石钢材和高性能钢腐蚀和疲劳性能研究

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摘要

Weathering steel (WS) and high-performance steel (HPS) have been widely used in bridge engineering. Corrosion effects can lead to a reduction in the fatigue strengths of the WS and HPS, especially for the base metals, threatening the safety and reliability of the WS or HPS bridge. Corrosion typically consists of uniform corrosion and pitting corrosion, and the reduction of the fatigue strength of the WS and HPS owing to corrosion generally depends on the steel type and corrosion time. This study conducted an experimental test to investigate the corrosion and fatigue performances of the base metal of Q345CNH, a typical type of WS used in China, and HPS 70 W, a typical steel used in the U.S. First, the corrosion performances of both the WS and HPS under a marine environment were investigated through an accelerated corrosion test. Both the uniform corrosion and pitting corrosion of the specimens during the corrosion tests were found to match well with the proposed uniform corrosion and pitting corrosion numerical model. The simulated corrosive environment was also consistent with Qionghai (C3), a category of marine environment, according to Chinese specifications. Subsequently, to further study the fatigue performance of the corroded WS and HPS, a fatigue test was conducted on the corroded specimens subjected to the various corrosion cycles. The experimental results indicated that the corrosion effect causes a reduction in the fatigue strengths of Q345CNH and HPS 70 W. In general, the corrosion effect causes a 22.6 & ndash;38.3% reduction in fatigue strength for Q345CNH, and a 31.9 & ndash;35.7% reduction in fatigue strength for HPS 70 W. Meanwhile, the fatigue cracks of all failed specimens are derived from the pitting flaws. In addition, the reduction of the fatigue strength for both the WS and HPS increases with an increase in corrosion time. Moreover, the fatigue cracks wholly initiate from the pitting flaws. The results on the corrosion and fatigue performance could offer guidance for the design of uncoated WS bridges . (c) 2021 Published by Elsevier Ltd.
机译：耐候钢（WS）和高性能钢（HPS）已广泛用于桥梁工程。腐蚀效应可能导致WS和HPS的疲劳强度降低，特别是对于基础金属，威胁到WS或HPS桥的安全性和可靠性。腐蚀通常由均匀的腐蚀和蚀腐蚀组成，并且由于腐蚀而减小了WS和HP的疲劳强度通常取决于钢型和腐蚀时间。该研究进行了实验测试，研究了Q345CNH基础金属，中国使用的典型WS的腐蚀和疲劳性能，以及美国使用的典型钢，首先是WS的腐蚀性能通过加速腐蚀试验研究了海洋环境下的HPS。发现试样在腐蚀试验期间的均匀腐蚀和蚀腐蚀均与所提出的均匀腐蚀和点腐蚀数值模型相匹配。根据中国规格，模拟腐蚀环境也与Qionghai（C3）一致，Qionghai（C3）是一类海洋环境。随后，为了进一步研究腐蚀的WS和HPS的疲劳性能，在经过各种腐蚀循环的腐蚀试样上进行疲劳试验。实验结果表明，腐蚀效应导致Q345CNH和HPS 70W的疲劳强度降低。一般来说，腐蚀效应导致22.6＆ndash; Q345CNH的疲劳强度降低38.3％，31.9＆ndash; 35.7 HPS 70W的疲劳强度的效率降低％，同时，所有失败的样本的疲劳裂缝均来自凹陷缺陷。另外，随着腐蚀时间的增加，WS和HPS的疲劳强度的减少增加。而且，疲劳裂缝完全从凹陷缺陷引发。腐蚀和疲劳性能的结果可以为未涂层的WS桥设计提供指导。 （c）2021由elestvier有限公司出版

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  • 来源
    《Construction and Building Materials》 |2021年第28期|123108.1-123108.18|共18页
  • 作者

    Zhang Yu; Zheng Kaifeng; Zhu Jin; Lei Ming; Feng Xiaoyang;

  • 作者单位

    Southwest Jiaotong Univ 111 North Sect 1 2nd Ring Rd Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ 111 North Sect 1 2nd Ring Rd Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ 111 North Sect 1 2nd Ring Rd Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ 111 North Sect 1 2nd Ring Rd Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ 111 North Sect 1 2nd Ring Rd Chengdu 610031 Sichuan Peoples R China;

  • 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

    Uniform corrosion; Pitting corrosion; Corrosion test; Fatigue test; Fatigue strength;

    机译：均匀腐蚀;点腐蚀;腐蚀试验;疲劳试验;疲劳强度;

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