Post-Fracture redundancy evaluation of a twin box-girder shinkansen bridge in Japan

Weiwei Lin, Teruhiko Yoda, Nozomu Taniguchi, Heang Lam, Kazuki Nakabayashi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    As the national bridge inventory ages and traffic volumes increase, the government is spending more on maintaining their existing structures to extend the service life of the current bridge inventory. This includes two-girder bridges that are classified as fracture critical and non-redundant. Owing to the increased inspection costs associated with these fracture-critical bridges, there is a need to evaluate alternate load paths and to implement retrofit methods on existing bridge structures to avoid bridge replacement. In this paper, after-fracture redundancy of two-girder bridges is investigated through a case study for a four-span continuous steel-concrete composite twin boxgirder bridge. The finite element analysis was carried out to evaluate the load-carrying capacity after failure of one girder of the two-girder bridge. Two types of the main-girder damage, including fracture of the bottom flange only, and fracture of both bottom flange and the web were considered respectively in this study. Typical damage locations including mid-span section of the main girder and the sections near the intermediate support were also considered in the numerical analyses. On the basis of the numerical results, the present continuous steel-concrete composite box-girder bridge was classified as a redundant bridge, and the concrete deck was considered as the key member for ensuring the bridge redundancy after severe damages occurred on the main girders.

    Original languageEnglish
    Title of host publicationIABSE Conference, Guangzhou 2016: Bridges and Structures Sustainability - Seeking Intelligent Solutions - Report
    PublisherInternational Association for Bridge and Structural Engineering (IABSE)
    Pages675-682
    Number of pages8
    ISBN (Electronic)9783857481420
    Publication statusPublished - 2016
    EventIABSE Conference, Guangzhou 2016: Bridges and Structures Sustainability - Seeking Intelligent Solutions - Guangzhou, China
    Duration: 2016 May 82016 May 11

    Other

    OtherIABSE Conference, Guangzhou 2016: Bridges and Structures Sustainability - Seeking Intelligent Solutions
    CountryChina
    CityGuangzhou
    Period16/5/816/5/11

    Keywords

    • FEM
    • Field test
    • Post-fracture
    • Redundancy evaluation
    • Twin box-girder

    ASJC Scopus subject areas

    • Building and Construction

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  • Cite this

    Lin, W., Yoda, T., Taniguchi, N., Lam, H., & Nakabayashi, K. (2016). Post-Fracture redundancy evaluation of a twin box-girder shinkansen bridge in Japan. In IABSE Conference, Guangzhou 2016: Bridges and Structures Sustainability - Seeking Intelligent Solutions - Report (pp. 675-682). International Association for Bridge and Structural Engineering (IABSE).