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Reliability-based service life prediction of existing concrete structures under marine environment

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Abstract

Chloride-induced corrosion of the reinforcement is considered as one of the major mechanisms resulting in the reduction of structural resistance of reinforced concrete structural elements located in marine and other aggressive environments. A study of reinforced concrete structures located at the Fangcheng dock in the Beibu Gulf port, China, was present. The result from field survey indicates that the concrete cover depth and chloride diffusion coefficient fit best normal distribution and lognormal distribution, respectively. The service life of structure is about 55 a, while initiation time is 45 a. Sensitivity analysis indicates that the most influential factor of the structure service life prediction is concrete cover, followed by diffusion coefficient, diffusion decay index, critical chloride concentration, surface chloride concentration, current density and localized pitting corrosion. Finally, the effects of diffusion decay index and critical chloride concentration on structure service life prediction are discussed.

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Authors and Affiliations

  1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai, 200240, China

    Ling-jie Wu  (吴灵杰), Yong-jun Zhou  (周拥军), Xin-jian Kou  (寇新建) & Meng Jiang  (蒋萌)

Authors
  1. Ling-jie Wu  (吴灵杰)
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  2. Yong-jun Zhou  (周拥军)
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  3. Xin-jian Kou  (寇新建)
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  4. Meng Jiang  (蒋萌)
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Corresponding author

Correspondence to Yong-jun Zhou  (周拥军).

Additional information

Foundation item: Project(41274012) supported by the National Natural Science Foundation of China

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Wu, Lj., Zhou, Yj., Kou, Xj. et al. Reliability-based service life prediction of existing concrete structures under marine environment. J. Cent. South Univ. 22, 3608–3614 (2015). https://doi.org/10.1007/s11771-015-2901-3

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  • DOI: https://doi.org/10.1007/s11771-015-2901-3

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