Fatigue Curve Determination for Corroded High-Strength Bridge Wires
Publication: Journal of Engineering Mechanics
Volume 147, Issue 5
Abstract
Accurate residual life evaluation is crucial for maintenance of corroded bridge wires, and a stress-life () curve is determined for the fatigue strength of steel wires after corrosion. The curve is established based on assumptions that the maximum pit depth can qualify as an indicator of the corrosion level, and the residual life primarily depends on the crack growth of the corroded wire. By means of the Paris law, the curve is derived for the corroded wires. Intensive reported experimental results from both corrosion acceleration wires and artificially notched wires as well as the corresponding numerical simulation are then used to validate the proposed model. A sensitivity study is also presented to prove the wide applicability of the proposed curve under different factors, including the corrosion pit shape, stress ratio, fatigue loading frequency, and corrosive environment.
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Data Availability Statement
No data, models, or code were generated or used during the study.
Acknowledgments
The authors would like to acknowledge financial support by Sichuan Science and Technology program (No.2019YJ0223) and the National Science Foundation of China (No. 51208430).
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© 2021 American Society of Civil Engineers.
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Received: Jul 29, 2020
Accepted: Jan 15, 2021
Published online: Mar 10, 2021
Published in print: May 1, 2021
Discussion open until: Aug 10, 2021
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