Experimental Investigation of the Bond Performance between Nonuniformly Corroded Reinforcing Bar and Concrete
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 12
Abstract
In this study, bond failure tests were carried out on eight beam anchorage specimens after accelerated corrosion, and the crack widths on the concrete surface and the nonuniform corrosion characteristics of the reinforcing bars were analyzed. The testing results show that the pitting volume and maximum crack width on the concrete surface both increase exponentially as the mass loss rate increases. According to the testing results, the pitting coefficient and uniform coefficient are introduced to reflect the effect of the pitting corrosion and uniform corrosion, respectively, on the bond strength, and as these two coefficients increase, the bond strength greatly decreases. In addition, based on the maximum crack width on the concrete surface, bond strength and peak slip models are developed, and a bond stress–slip model of the nonuniformly corroded reinforcing bar is proposed, combined with that of uncorroded reinforcing bar. It is proved that the proposed models provide good predictions.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This study received financial support from the National Natural Science Foundation of China (Nos. 52108106 and 51822801).
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Journal of Materials in Civil Engineering
Volume 34 • Issue 12 • December 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Dec 9, 2021
Accepted: Apr 6, 2022
Published online: Oct 7, 2022
Published in print: Dec 1, 2022
Discussion open until: Mar 7, 2023
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Cited by
- Caiwei Liu, Liangtai Yan, Jianxin Zheng, Jijun Miao, Yanchun Liu, Bond Deterioration between Corroded Reinforcing Bars with Variable Diameters and Concrete at Elevated Temperatures, Journal of Structural Engineering, 10.1061/JSENDH.STENG-11967, 149, 10, (2023).