Structural Engineering and Mechanics

  • 제75권4호
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  • Pages.455-464
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  • 2020
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Load bearing capacity reduction of concrete structures due to reinforcement corrosion

  • Chen, Hua-Peng (Institute for Smart Transportation Infrastructure, East China Jiaotong University) ;
  • Nepal, Jaya (School of Architecture, Computing and Engineering, University of East London)
  • 투고 : 2020.02.11
  • 심사 : 2020.04.13
  • 발행 : 2020.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

Reinforcement corrosion is one of the major problems in the durability of reinforced concrete structures exposed to aggressive environments. Deterioration caused by reinforcement corrosion reduces the durability and the safety margin of concrete structures, causing excessive costs in managing these structures safely. This paper aims to investigate the effects of reinforcement corrosion on the load bearing capacity deterioration of the corroded reinforced concrete structures. A new analytical method is proposed to predict the crack growth of cover concrete and evaluate the residual strength of concrete structures with corroded reinforcement failing in bond. The structural performance indicators, such as concrete crack growth and flexural strength deterioration rate, are assumed to be a stochastic process for lifetime distribution modelling of structural performance deterioration over time during the life cycle. The Weibull life evolution model is employed for analysing lifetime reliability and estimating remaining useful life of the corroded concrete structures. The results for the worked example show that the proposed approach can provide a reliable method for lifetime performance assessment of the corroded reinforced concrete structures.

키워드

과제정보

The authors are very grateful for the financial supports received from the National Natural Science Foundation of China (Grant No. 51978263) and the Natural Science Key Foundation of Jiangxi Province (Grant No. 20192ACBL20008).

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