高频机械冲击处理桥梁焊缝的高周变幅疲劳试验和设计框架

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-08-01 DOI:10.1002/stco.202200003

Poja Shams‐Hakimi, H. Al‐Karawi, M. Al‐Emrani

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引用次数: 3

摘要

通过高频机械冲击(HFMI)处理来增强疲劳，可以实现有效的钢桥设计和施工。然而，桥梁可能会经历高且变化的平均应力，其影响目前没有任何设计建议或HFMI处理关节的文献。在本研究中，在实际使用的桥梁荷载下进行了疲劳试验，结果显示出与恒幅荷载相同的高疲劳性能。本文量化了平均应力在谱荷载中的作用，并提出了一种用等效方法来解释其影响的方法。设计框架是为设计和工程目的而开发的。

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High‐cycle variable amplitude fatigue experiments and design framework for bridge welds with high‐frequency mechanical impact treatment

Fatigue enhancement by way of high‐frequency mechanical impact (HFMI) treatment can enable effective design and construction of steel bridges. However, bridges may experience high and varying mean stresses, the effects of which are not covered today by any design recommendation or in the literature on HFMI‐treated joints. In this study, fatigue experiments were conducted with realistic in‐service bridge loading, which revealed the same high fatigue performance as for constant amplitude loading. The effect of mean stress in spectrum loading was quantified and a method to account for it in an equivalent manner is proposed. A design framework has been developed for design and engineering purposes.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.