Fatigue evaluation of rib-to-deck welded joint using averaged strain energy density method

Pengjun Luo, Qinghua Zhang, Yi Bao, Aixin Zhou

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

This paper investigates the feasibility of an averaged strain energy density (SED) method for fatigue evaluation of rib-to-deck weld joint in orthotropic steel deck. The effect of weld geometry on fatigue resistance of rib-to-deck joint is evaluated. The analysis results of the presented average SED method are validated against fatigue testing data and compared with the results of the conventional hot-spot stress and effective notch stress methods. A W-N curve is derived using the averaged SED method and used for evaluating the fatigue strength of rib-to-deck welded joints. The averaged SED method is also used to investigate the effect of weld geometrical variables on the fatigue failure mode transition, and the fatigue strength of full-scale orthotropic steel deck specimens. The results indicate that the averaged SED method provides superior ability in evaluating fatigue resistance and failure mode of rib-to-deck welded joint.

Original languageEnglish
Pages (from-to)682-694
Number of pages13
JournalEngineering Structures
Volume177
DOIs
StatePublished - 15 Dec 2018

Keywords

  • Fatigue evaluation
  • Fatigue failure mode
  • Finite element analysis
  • Orthotropic steel deck
  • Rib-to-deck welded joint
  • Strain energy density

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