Analytical model of corrosion-induced cracks in concrete considering time-varying deformations of layers, mechanical properties of rust
This paper presents an analytical model to simulate the evolution of corrosion-induced cracks in concrete considering the combined effects of time-dependent deformations of layers and mechanical properties of corrosion products applying the principle of equilibrium of force and compatibility of defo...
| Principais autores: | , , |
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| Outros Autores: | |
| Formato: | Journal Article |
| Idioma: | English |
| Publicado em: |
2022
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| Assuntos: | |
| Acesso em linha: | https://hdl.handle.net/10356/161095 |
| _version_ | 1826125101235437568 |
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| author | Bui, Huy Tang Maekawa, Koichi Tan, Kang Hai |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Bui, Huy Tang Maekawa, Koichi Tan, Kang Hai |
| author_sort | Bui, Huy Tang |
| collection | NTU |
| description | This paper presents an analytical model to simulate the evolution of corrosion-induced cracks in concrete considering the combined effects of time-dependent deformations of layers and mechanical properties of corrosion products applying the principle of equilibrium of force and compatibility of deformations. Stress, strain and deformation in respective layers of corroding steel, rust and uncracked concrete are determined based on elasticity theory, while coupling tensile softening model and elastic modulus reduction is applied to simulate the cracked concrete. Time-varying deformations of four layers and the influence elastic modulus and Poisson's ratio of rust are considered in force equilibrium and compatibility conditions to determine crack length, stress and strain distributions. It is shown that not only the time-to-surface cracking is shortened, the trend of crack development is also altered if the deformations of layers are considered. A higher elastic modulus results in a faster time for cracks to reach the concrete surface, while a larger Poisson's ratio would lead to slower propagation of cracks. By analysing the results obtained from the proposed model and test data, a semi-empirical relationship between applied current density and elastic modulus of rust is recommended. This correlation could be used to predict the elastic modulus of rust which is an important parameter in modelling corrosion-induced cracks in concrete. |
| first_indexed | 2024-10-01T06:31:10Z |
| format | Journal Article |
| id | ntu-10356/161095 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:31:10Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1610952022-08-15T07:17:20Z Analytical model of corrosion-induced cracks in concrete considering time-varying deformations of layers, mechanical properties of rust Bui, Huy Tang Maekawa, Koichi Tan, Kang Hai School of Civil and Environmental Engineering Engineering::Civil engineering Analytical Model Corrosion-Induced Cracks This paper presents an analytical model to simulate the evolution of corrosion-induced cracks in concrete considering the combined effects of time-dependent deformations of layers and mechanical properties of corrosion products applying the principle of equilibrium of force and compatibility of deformations. Stress, strain and deformation in respective layers of corroding steel, rust and uncracked concrete are determined based on elasticity theory, while coupling tensile softening model and elastic modulus reduction is applied to simulate the cracked concrete. Time-varying deformations of four layers and the influence elastic modulus and Poisson's ratio of rust are considered in force equilibrium and compatibility conditions to determine crack length, stress and strain distributions. It is shown that not only the time-to-surface cracking is shortened, the trend of crack development is also altered if the deformations of layers are considered. A higher elastic modulus results in a faster time for cracks to reach the concrete surface, while a larger Poisson's ratio would lead to slower propagation of cracks. By analysing the results obtained from the proposed model and test data, a semi-empirical relationship between applied current density and elastic modulus of rust is recommended. This correlation could be used to predict the elastic modulus of rust which is an important parameter in modelling corrosion-induced cracks in concrete. 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). 2022-08-15T07:17:20Z 2022-08-15T07:17:20Z 2022 Journal Article Bui, H. T., Maekawa, K. & Tan, K. H. (2022). Analytical model of corrosion-induced cracks in concrete considering time-varying deformations of layers, mechanical properties of rust. Construction and Building Materials, 316, 125883-. https://dx.doi.org/10.1016/j.conbuildmat.2021.125883 0950-0618 https://hdl.handle.net/10356/161095 10.1016/j.conbuildmat.2021.125883 2-s2.0-85120303522 316 125883 en COT-V2-2019-1 Construction and Building Materials © 2021 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Analytical Model Corrosion-Induced Cracks Bui, Huy Tang Maekawa, Koichi Tan, Kang Hai Analytical model of corrosion-induced cracks in concrete considering time-varying deformations of layers, mechanical properties of rust |
| title | Analytical model of corrosion-induced cracks in concrete considering time-varying deformations of layers, mechanical properties of rust |
| title_full | Analytical model of corrosion-induced cracks in concrete considering time-varying deformations of layers, mechanical properties of rust |
| title_fullStr | Analytical model of corrosion-induced cracks in concrete considering time-varying deformations of layers, mechanical properties of rust |
| title_full_unstemmed | Analytical model of corrosion-induced cracks in concrete considering time-varying deformations of layers, mechanical properties of rust |
| title_short | Analytical model of corrosion-induced cracks in concrete considering time-varying deformations of layers, mechanical properties of rust |
| title_sort | analytical model of corrosion induced cracks in concrete considering time varying deformations of layers mechanical properties of rust |
| topic | Engineering::Civil engineering Analytical Model Corrosion-Induced Cracks |
| url | https://hdl.handle.net/10356/161095 |
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