Life-cycle reliability analysis of shield tunnels in coastal regions: emphasis on flexural performance of deteriorating segmental linings

Zhengshu He, Mitsuyoshi Akiyama, Chuan He, Dan M. Frangopol, Si Jin Liu

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    In contrast to reinforced concrete (RC) structures on land, RC shield tunnels in coastal regions deteriorate rapidly after their construction because of the combined effects of multiple mechanical and environmental stressors. In this paper, by considering the coastal hazards associated with chloride and the impacts of hydrostatic pressure, a novel approach is presented to estimate the life-cycle structural performance of a shield tunnel that has undergone deterioration due to chloride-induced steel corrosion. Deterioration processes in segmental linings are investigated via corrosion-accelerated experiments on individual segments, and the combined effects of corrosive agents and loads are emphasized. Monte Carlo simulation is used to estimate the time-variant failure probability of shield tunnels in a marine environment. In an illustrative example, the effects of structural location, hydrostatic pressure and material properties on the life-cycle reliability of shield tunnels are investigated.

    Original languageEnglish
    JournalStructure and Infrastructure Engineering
    DOIs
    Publication statusPublished - 2019 Jan 1

    Keywords

    • chloride
    • corrosion initiation
    • deterioration
    • hazard assessment
    • hydrostatic pressure
    • Reinforced concrete shield tunnel
    • time-variant failure probability

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction
    • Safety, Risk, Reliability and Quality
    • Geotechnical Engineering and Engineering Geology
    • Ocean Engineering
    • Mechanical Engineering

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