Numerical study on post-fracture redundancy of the two-girder steel-concrete composite highway bridges

Weiwei Lin, Teruhiko Yoda*, Yoji Kumagai, Takeshi Saigyo

*この研究の対応する著者

    研究成果査読

    19 被引用数 (Scopus)

    抄録

    As the Japan 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, fracture redundancy of the two-girder bridge is investigated through a case study for a three-span continuous twin I-girder bridge. The finite element analysis is carried out to evaluate the load-carrying capacity after fracture of a girder of the two-girder bridge. Damage of studs near the moment contra-flexure regions are also considered in this study. Spacing between the transverse beams is discussed as possible techniques to improve redundancy and reduce the fracture potential of two-girder bridge structures. The concrete slab is indicated to be a significant member for guarantying the redundancy of the two-girder steel-concrete composite bridges.

    本文言語English
    ページ(範囲)671-681
    ページ数11
    ジャーナルInternational Journal of Steel Structures
    13
    4
    DOI
    出版ステータスPublished - 2013 12

    ASJC Scopus subject areas

    • 土木構造工学

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