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Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment

A novel prediction model for crack development of reinforced concrete (RC) piles with localized chloride corrosion in the 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 exten...

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Autores principales: Shao, Wei, He, Xiaoqing, Shi, Danda, Zhu, Wenjin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10573404/
https://www.ncbi.nlm.nih.gov/pubmed/37834540
http://dx.doi.org/10.3390/ma16196403
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author Shao, Wei
He, Xiaoqing
Shi, Danda
Zhu, Wenjin
author_facet Shao, Wei
He, Xiaoqing
Shi, Danda
Zhu, Wenjin
author_sort Shao, Wei
collection PubMed
description A novel prediction model for crack development of reinforced concrete (RC) piles with localized chloride corrosion in the 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 the 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 the corrosion pit, the depth corrosion pit, and the cross-sectional area loss of reinforcement gradually increase as the corrosion level increases. The loss of the local reinforcement section at crack initiation increases with the increase in the ratio of concrete cover to initial diameter and increases with the increase in the pitting factor. The required pit depth for reinforcement cracking increases with the increase in the ratio of concrete cover thickness to diameter. The loss of the cross-sectional area of reinforcement and the radius of the corrosion pit increase with the increase in the initial diameter of reinforcement. Increasing the pitting factor can 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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spelling pubmed-105734042023-10-14 Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment Shao, Wei He, Xiaoqing Shi, Danda Zhu, Wenjin Materials (Basel) Article A novel prediction model for crack development of reinforced concrete (RC) piles with localized chloride corrosion in the 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 the 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 the corrosion pit, the depth corrosion pit, and the cross-sectional area loss of reinforcement gradually increase as the corrosion level increases. The loss of the local reinforcement section at crack initiation increases with the increase in the ratio of concrete cover to initial diameter and increases with the increase in the pitting factor. The required pit depth for reinforcement cracking increases with the increase in the ratio of concrete cover thickness to diameter. The loss of the cross-sectional area of reinforcement and the radius of the corrosion pit increase with the increase in the initial diameter of reinforcement. Increasing the pitting factor can 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. MDPI 2023-09-26 /pmc/articles/PMC10573404/ /pubmed/37834540 http://dx.doi.org/10.3390/ma16196403 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shao, Wei
He, Xiaoqing
Shi, Danda
Zhu, Wenjin
Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment
title Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment
title_full Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment
title_fullStr Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment
title_full_unstemmed Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment
title_short Prediction of Crack Width in RC Piles Exposed to Local Corrosion in Chloride Environment
title_sort prediction of crack width in rc piles exposed to local corrosion in chloride environment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10573404/
https://www.ncbi.nlm.nih.gov/pubmed/37834540
http://dx.doi.org/10.3390/ma16196403
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