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http://dx.doi.org/10.12989/acc.2019.7.4.203

Numerical analysis of concrete degradation due to chloride-induced steel corrosion  

Ayinde, Olawale O. (Department of Civil Engineering, School of Science, Nanjing University of Science and Technology)
Zuo, Xiao-Bao (Department of Civil Engineering, School of Science, Nanjing University of Science and Technology)
Yin, Guang-Ji (Department of Civil Engineering, School of Science, Nanjing University of Science and Technology)
Publication Information
Advances in concrete construction / v.7, no.4, 2019 , pp. 203-210 More about this Journal
Abstract
Concrete structures in marine environment are susceptible to chloride attack, where chloride diffusion results in the corrosion of steel bar and further lead to the cracking of concrete cover. This process causes structural deterioration and affects the response of concrete structures to different forms of loading. This paper presents the use of ABAQUS Finite Element Software in simulating the processes involved in concrete's structural degradation from chloride diffusion to steel corrosion and concrete cover cracking. Fick's law was used for the chloride diffusion, while the mass loss from steel corrosion was obtained using Faraday's law. Pressure generated by steel corrosion product at the concrete-steel interface was modeled by applying uniform radial displacements, while concrete smeared cracking alongside the Extended Finite Element Method (XFEM) was used for concrete cover cracking simulation. Results show that, chloride concentration decreases with penetration depth, but increases with exposure time at the concrete-steel interface. Cracks initiate and propagate in the concrete cover as pressure caused by the steel corrosion product increases. Furthermore, the crack width increases with the exposure time on the surface of the concrete.
Keywords
concrete; steel; chloride; corrosion; cracking; extended finite element method; ABAQUS;
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Times Cited By KSCI : 3  (Citation Analysis)
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