Computers and Concrete

  • 제21권4호
  • /
  • Pages.471-484
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  • 2018
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A multiscale numerical simulation approach for chloride diffusion and rebar corrosion with compensation model

  • Tu, Xi (Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University) ;
  • Li, Zhengliang (Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University) ;
  • Chen, Airong (Department of Bridge Engineering, Tongji University) ;
  • Pan, Zichao (Department of Bridge Engineering, Tongji University)
  • 투고 : 2017.08.09
  • 심사 : 2018.02.19
  • 발행 : 2018.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

Refined analysis depicting mass transportation and physicochemical reaction and reasonable computing load with acceptable DOFs are the two major challenges of numerical simulation for concrete durability. Mesoscopic numerical simulation for chloride diffusion considering binder, aggregate and interfacial transition zone is unable to be expended to the full structure due to huge number of DOFs. In this paper, a multiscale approach of combining both mesoscopic model including full-graded aggregate and equivalent macroscopic model was introduced. An equivalent conversion of chloride content at the Interfacial Transition Layer (ITL) connecting both models was considered. Feasibility and relative error were discussed by analytical deduction and numerical simulation. Case study clearly showed that larger analysis model in multiscale model expanded the diffusion space of chloride ion and decreased chloride content in front of rebar. Difference for single-scale simulation and multiscale approach was observed. Finally, this paper addressed some worth-noting conclusions about the chloride distribution and rebar corrosion regarding the configuration of rebar placement, rebar diameter, concrete cover and exposure period.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Central Universities

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피인용 문헌

  1. Numerical Study on Diffusion of Chloride and Induced Rebar Corrosion by Two-Dimensional Multiscale Approach vol.2018, pp.None, 2018, https://doi.org/10.1155/2018/1932813
  2. Influence of Pore Size and Fatigue Loading on NaCl Transport Properties in C-S-H Nanopores: A Molecular Dynamics Simulation vol.13, pp.3, 2018, https://doi.org/10.3390/ma13030700
  3. Numerical model for local corrosion of steel reinforcement in reinforced concrete structure vol.27, pp.4, 2018, https://doi.org/10.12989/cac.2021.27.4.385