Influence of Bar Diameter on Low-Cycle Fatigue Degradation of Reinforcing Bars
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 4
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.
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Acknowledgments
The experimental program was financially supported by the Earthquake and Geotechnical Engineering Research Group (EGERG) at the University of Bristol. The SEM studies were conducted in the Chemistry Imaging Facility with equipment funded by the University of Bristol and the Engineering and Physical Sciences Research Council Grant No. EP/K035746/1. The second author is thankful for the financial support provided by China Scholarship Council (File No. 201506260126). Any recommendations provided in this paper are the opinions of the authors and do not constitute a standard or code of practice. The authors thank the anonymous reviewers for their help improving the paper. The raw test data from the LCF tests are available from Kashani et al. (2018a).
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 4 • April 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Feb 15, 2018
Accepted: Sep 10, 2018
Published online: Jan 31, 2019
Published in print: Apr 1, 2019
Discussion open until: Jun 30, 2019
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