Shao, W.; He, X.; Shi, D.; Zhu, W. Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment. Materials2023, 16, 6403.
Shao, W.; He, X.; Shi, D.; Zhu, W. Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment. Materials 2023, 16, 6403.
Shao, W.; He, X.; Shi, D.; Zhu, W. Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment. Materials2023, 16, 6403.
Shao, W.; He, X.; Shi, D.; Zhu, W. Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment. Materials 2023, 16, 6403.
Abstract
A novel prediction model for crack development of reinforced concrete (RC) piles with localized chloride corrosion in marine environment is proposed. A discrete method is used to solve the corrosion pit radius model and a crack extension model is developed to investigate the initiation and extension of cracks. The maximum corrosion degree of reinforced concrete pile is predicted according to the limit crack criterion, and finally a sensitivity analysis is carried out on the important parameters of crack extension. The results show that the radius of corrosion pit, the depth corrosion pit and cross-sectional area loss of reinforcement gradually increase as the corrosion level increases. The loss of local reinforcement section at crack initiation decreases with the increase of the ratio of concrete cover to initial diameter, and increases with the increase of pitting factor. The required pit depth for reinforcement cracking increases with the increase of the ratio of concrete cover thickness to diameter. The loss of cross-sectional area of reinforcement and the radius of corrosion pit increase with the increase of initial diameter of reinforcement. Increasing the pitting factor will reduce the pit depth and make the crack width develop faster before reaching the limit crack width. Increasing the concrete cover thickness can provide an improvement in the propagation of cracks. A comparative analysis shows that the localized corrosion pattern is more in conformity with marine engineering practice.
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