Fatigue behavior and strength evaluation of vertical stiffener welded joint in orthotropic steel decks

Muye Yang, Bohai Ji, Zhiyuan YuanZhou, Zhongqiu Fu

研究成果: Contribution to journalArticle査読

10 被引用数 (Scopus)

抄録

This study focuses on the fatigue strength and crack behaviors at weld toe of vertical stiffener and deck in orthotropic steel decks. A total of 20 specimens have been carried out in fatigue tests in relation to the two types of welded joints and diverse stress conditions. The crack initiation and propagation behaviors were comparative analyzed based on four stages of cracking process. In addition, the geometry properties of welded joints were measured in cross sections, and their effect on stress concentration factors was investigated by test and FE analysis. Based on these, the stress concentration factors were calculated and compared by hot spot stress method. Finally, the fatigue strength of this structural detail had been investigated by comparing the fatigue test results and the corresponding regression S[sbnd]N curves. Fatigue strength of partial penetration welded joint is slightly larger than full penetration welded joint before toe crack initiation. However, based on the crack behaviors in the propagation process on the whole, it is acceptable to evaluate these two kinds of welded joint by the same S[sbnd]N curve in practical engineering application.Using the same S[sbnd]N curve JSSC-G (50 MPa) for the allowable fatigue strength evaluation of this structural detail in China was recommended.

本文言語英語
ページ(範囲)222-236
ページ数15
ジャーナルEngineering Failure Analysis
70
DOI
出版ステータス出版済み - 12 1 2016
外部発表はい

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 工学(全般)

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