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Structural Engineering and Mechanics Volume 75, Number 4, August25 2020 , pages 455-464 DOI: https://doi.org/10.12989/sem.2020.75.4.455 |
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Load bearing capacity reduction of concrete structures due to reinforcement corrosion |
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Hua-Peng Chen and Jaya Nepal
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| Abstract | ||
| 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. | ||
| Key Words | ||
| rebar corrosion; concrete cracking; strength deterioration; lifetime reliability; residual life | ||
| Address | ||
| Hua-Peng Chen: Institute for Smart Transportation Infrastructure, East China Jiaotong University, Jiangxi 330013, China Jaya Nepal: School of Architecture, Computing and Engineering, University of East London, London E16 2RD, United Kingdom | ||