Multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs
Corrosion-induced concrete cracking is of importance in evaluating service life of reinforced concrete (RC) slabs. Rust distribution and steel bar configuration are two of the most parameters affecting not only internal and surface crack patterns, but also evolution of surface crack width. In this p...
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sg-ntu-dr.10356-1701682023-08-30T03:31:43Z Multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs Bui, Huy Tang Tan, Kang Hai School of Civil and Environmental Engineering Engineering::Civil engineering Rust Distribution Multi-peak Corrosion-induced concrete cracking is of importance in evaluating service life of reinforced concrete (RC) slabs. Rust distribution and steel bar configuration are two of the most parameters affecting not only internal and surface crack patterns, but also evolution of surface crack width. In this paper, a mathematical model based on Asymmetrical Generalised von Mises distribution (AGvM model) was proposed to simulate multi-peak asymmetrical nonuniform rust layer around the steel bar's circumference. Besides, an advanced 3D finite element (FE) model was developed incorporating rust distribution obtained from the AGvM model to simulate corrosion-induced concrete cracking. An experimental programme of six RC slabs with three different steel bar configurations and two corrosion levels was conducted to validate the AGvM and the FE models. As a result, it showed that the proposed AGvM model was capable of simulating rust distribution around the steel bar better than the other six existing mathematical models, especially when the rust layer had two peaks and its distribution was highly asymmetrical. Moreover, the 3D FE model could reasonably predict internal and surface crack patterns, as well as evolution of surface crack width of RC slabs. Based on the test results and numerical models, effects of steel bar configurations on corrosion-induced concrete cracking were discussed. 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). 2023-08-30T03:31:42Z 2023-08-30T03:31:42Z 2023 Journal Article Bui, H. T. & Tan, K. H. (2023). Multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs. Cement and Concrete Composites, 140, 105087-. https://dx.doi.org/10.1016/j.cemconcomp.2023.105087 0958-9465 https://hdl.handle.net/10356/170168 10.1016/j.cemconcomp.2023.105087 2-s2.0-85153681192 140 105087 en COT-V2-2019-1 Cement and Concrete Composites © 2023 Elsevier Ltd. All rights reserved. |
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Engineering::Civil engineering Rust Distribution Multi-peak Bui, Huy Tang Tan, Kang Hai Multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs |
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Corrosion-induced concrete cracking is of importance in evaluating service life of reinforced concrete (RC) slabs. Rust distribution and steel bar configuration are two of the most parameters affecting not only internal and surface crack patterns, but also evolution of surface crack width. In this paper, a mathematical model based on Asymmetrical Generalised von Mises distribution (AGvM model) was proposed to simulate multi-peak asymmetrical nonuniform rust layer around the steel bar's circumference. Besides, an advanced 3D finite element (FE) model was developed incorporating rust distribution obtained from the AGvM model to simulate corrosion-induced concrete cracking. An experimental programme of six RC slabs with three different steel bar configurations and two corrosion levels was conducted to validate the AGvM and the FE models. As a result, it showed that the proposed AGvM model was capable of simulating rust distribution around the steel bar better than the other six existing mathematical models, especially when the rust layer had two peaks and its distribution was highly asymmetrical. Moreover, the 3D FE model could reasonably predict internal and surface crack patterns, as well as evolution of surface crack width of RC slabs. Based on the test results and numerical models, effects of steel bar configurations on corrosion-induced concrete cracking were discussed. |
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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 |
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Bui, Huy Tang Tan, Kang Hai |
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Bui, Huy Tang |
title |
Multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs |
title_short |
Multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs |
title_full |
Multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs |
title_fullStr |
Multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs |
title_full_unstemmed |
Multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs |
title_sort |
multi-peak nonuniform model of rust distribution and corrosion-induced concrete cracking in reinforced concrete slabs |
publishDate |
2023 |
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https://hdl.handle.net/10356/170168 |
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1779156433819926528 |