Abstract
To study the corrosion cracking process of reinforced concrete under the combined effects of chloride and fatigue loading, the constan-current and dry-wet cycle accelerated corrosion method was used to corrosion the specimens under different stress levels for different time. The quality loss of reinforcement, the composition of corrosion products and the cracking of concrete are analyzed from the macro, micro and micro scales, and to obtain the spatial distribution as well as microscopic characteristics of corrosion products of the reinforcement bar under coupling conditions. Additionally, a model of steel rust cracking under the coupled action of chloride and fatigue loading is established. The results show that: under the same corrosion time, the concrete cracking and steel corrosion degree become more serious with the increase of stress level. The greater the stress level, the earlier corrosion occurs and the more corrosion products are, Moreover, due to the fatigue load, the concrete on the upper side of the steel bar has rust expansion cracks earlier than the lower side.
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Acknowledgments
The authors wish to acknowledge the financial support of the National Natural Science Foundation of China (Grant No. 51778577, 51778302, 51778578), the Natural Science Foundation of Zhejiang (Grant No. LY17E080017) and the Natural Science Foundation of Ningbo(Grant No. 2019A610401).
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Shen, J., Liu, J., Xu, Y. et al. Corrosion Cracking Process of Reinforced Concrete under the Coupled Effects of Chloride and Fatigue Loading. KSCE J Civ Eng 25, 3376–3389 (2021). https://doi.org/10.1007/s12205-021-0768-4
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DOI: https://doi.org/10.1007/s12205-021-0768-4