Experimental Study on the Degradation of Mechanical Properties of Galvanized High-Strength Steel Wires for Bridge Cables Considering Prefatigue Effect
Publication: Journal of Bridge Engineering
Volume 29, Issue 8
Abstract
When the high-density polyethylene sheath of bridge cables is not cracked, the galvanized high-strength steel wires are not corroded and only subjected to the fatigue loads of vehicles (called prefatigue). Some studies have confirmed that the corrosion rate and fatigue life of certain alloy materials can be affected by the prefatigue, which is not clear for the corroded steel wires in bridge cables. In this paper, the mechanical properties of high-strength steel wires considering the prefatigue effect under fatigue-corrosion alternating loading were studied, and the residual fatigue life was predicted. First, the corrosion characteristics of high-strength steel wires with different degrees of prefatigue and corrosion were explored through an optical microscope and a surface roughness measuring instrument. Then, the static mechanical properties and fatigue life of corroded steel wires were obtained. The results show that when the prefatigue effect is greater than the corrosion effect, the surface roughness of the corroded steel wires decreases significantly, leading to a smoother surface and a weaker stress concentration. Compared with the results in the “corrosion + fatigue” case, the fatigue life of the steel wires in the “fatigue (prefatigue) + corrosion + fatigue” case may increase. The prefatigue effect has no significant effect on the static performance of the corroded steel wires. Finally, a fatigue life prediction model of corroded steel wires considering the effect of prefatigue was established based on the aforementioned experimental data.
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Data Availability Statement
All data, models, and codes generated or used during the study appear in the published article.
Acknowledgments
The authors gratefully acknowledge The National Natural Science Foundation of China and Tianjin (Nos. 52108163 and 23JCZDJC00510), the 03 special and 5G projects in Jiangxi Province (20224ABC03A03), the Jiangxi Provincial Department of Transportation (2021H0006), and research on intelligent diagnosis technology of GMI magnetic detection for bridge cable damage for providing the funding that made this study possible.
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Published In
Journal of Bridge Engineering
Volume 29 • Issue 8 • August 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Aug 18, 2023
Accepted: Mar 28, 2024
Published online: Jun 12, 2024
Published in print: Aug 1, 2024
Discussion open until: Nov 12, 2024
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