Time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack
Corrosion of steel bars and consequent concrete cracking are complicated processes and they mutually affect one another. In this study, a 3D time-dependent numerical model was developed to simulate localised corrosion in both circumferential and longitudinal directions, incorporating effects of nonu...
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sg-ntu-dr.10356-1702532023-09-05T01:49:50Z Time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack Bui, Huy Tang Tan, Kang Hai School of Civil and Environmental Engineering Engineering::Civil engineering Corrosion-Induced Cracks Time-Dependent Corrosion of steel bars and consequent concrete cracking are complicated processes and they mutually affect one another. In this study, a 3D time-dependent numerical model was developed to simulate localised corrosion in both circumferential and longitudinal directions, incorporating effects of nonuniform corrosion-induced cracks. Time-dependent evolution of corroded area in the circumferential direction around the steel bar was calculated as a function of chloride concentration, while two configurations of corroded length along the steel bar axis were simulated: (1) the entire length of steel bar was corroded at the same time and (2) the corroded length progressively developed from the middle of the bar towards its two ends. Microcell and macrocell mechanisms were applied to determine the total corrosion rate. Consequently, a finite element model was developed to simulate nonuniform corrosion-induced concrete cracking. It was found that once a vertical crack propagated through the concrete cover, not only did the corroded area spread faster, microcell and macrocell current densities also substantially increased, and the shape of corroded depth became more rounded. Ministry of National Development (MND) National Research Foundation (NRF) This research is supported by the National Research Foundation, Singapore, and Ministry of National Development, Singapore, under its Cities of Tomorrow R&D Programme (CoT Award No. COT-V2-2019-1). 2023-09-05T01:49:50Z 2023-09-05T01:49:50Z 2023 Journal Article Bui, H. T. & Tan, K. H. (2023). Time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack. Structures, 52, 332-347. https://dx.doi.org/10.1016/j.istruc.2023.03.113 2352-0124 https://hdl.handle.net/10356/170253 10.1016/j.istruc.2023.03.113 2-s2.0-85151615370 52 332 347 en COT-V2-2019-1 Structures © 2023 Institution of Structural Engineers. Published by Elsevier Ltd. All rights reserved. |
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Engineering::Civil engineering Corrosion-Induced Cracks Time-Dependent Bui, Huy Tang Tan, Kang Hai Time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack |
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Corrosion of steel bars and consequent concrete cracking are complicated processes and they mutually affect one another. In this study, a 3D time-dependent numerical model was developed to simulate localised corrosion in both circumferential and longitudinal directions, incorporating effects of nonuniform corrosion-induced cracks. Time-dependent evolution of corroded area in the circumferential direction around the steel bar was calculated as a function of chloride concentration, while two configurations of corroded length along the steel bar axis were simulated: (1) the entire length of steel bar was corroded at the same time and (2) the corroded length progressively developed from the middle of the bar towards its two ends. Microcell and macrocell mechanisms were applied to determine the total corrosion rate. Consequently, a finite element model was developed to simulate nonuniform corrosion-induced concrete cracking. It was found that once a vertical crack propagated through the concrete cover, not only did the corroded area spread faster, microcell and macrocell current densities also substantially increased, and the shape of corroded depth became more rounded. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Bui, Huy Tang Tan, Kang Hai |
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Article |
author |
Bui, Huy Tang Tan, Kang Hai |
author_sort |
Bui, Huy Tang |
title |
Time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack |
title_short |
Time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack |
title_full |
Time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack |
title_fullStr |
Time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack |
title_full_unstemmed |
Time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack |
title_sort |
time-dependent nonuniform numerical model of corrosion process and consequent corrosion-induced concrete cracking under chloride attack |
publishDate |
2023 |
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https://hdl.handle.net/10356/170253 |
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1779156574400413696 |