Advances in concrete construction

  • 제7권4호
  • /
  • Pages.203-210
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  • 2019
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  • 2287-5301(pISSN)
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  • 2287-531X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

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)
  • 투고 : 2018.02.05
  • 심사 : 2019.03.17
  • 발행 : 2019.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

과제정보

연구 과제 주관 기관 : National Science Foundation of China

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  1. Investigation on compression properties of seawater-sea sand concrete vol.12, pp.2, 2019, https://doi.org/10.12989/acc.2021.12.2.093