Influence of bar diameter on low-cycle fatigue degradation of reinforcing bars

Mehdi Kashani, Shunyao Cai, Sean Davis, Paul Vardanega*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

2 Citations (Scopus)
268 Downloads (Pure)

Abstract

This paper reports the results of 120 low-cycle fatigue tests on steel reinforcing bars with varying slenderness ratios at varying strain amplitudes. The failure modes of the fractured bars were investigated through analysis of the fracture mechanisms of bars. The results of experimental testing were used to update empirical models of low-cycle fatigue life for such bars. The newly improved empirical models were then incorporated into a recently developed constitutive material model that accounts for bar buckling and fatigue. The experimental results show that the size effect is significant for short steel reinforcing bars where there is no buckling. The results also show that as the slenderness ratio of the steel reinforcing bars increases, the influence of the bar diameter on low-cycle fatigue reduces.

Original languageEnglish
Article number06019002
Number of pages9
JournalJournal of Materials in Civil Engineering
Volume31
Issue number4
Early online date31 Jan 2019
DOIs
Publication statusPublished - Apr 2019

Keywords

  • Inelastic buckling
  • Low-cycle fatigue
  • Modeling
  • Nonlinear analysis
  • Size effect
  • Stress-strain behavior

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