Redundancy of continuous two-girder steel-concrete composite highway bridges

W. Lin*, T. Yoda, T. Saigyo, K. Araki, Y. Kumagai

*Corresponding author for this work

Research output: Contribution to conferencePaperScientificpeer-review

1 Citation (Scopus)


Post-fracture redundancy of the two-girder bridges is investigated through a case study of a three-span continuous twin I-girder bridge designed in Japan. The FE analysis is employed to evaluate the load-carrying capacity after the fracture of one main girder of the two-girder bridge. The critical locations include the mid-span section of the middle span, the side span, as well as the section near the continuous pier support. Besides, damage of studs near the moment contra-flexure regions in both middle and side spans are also considered in this study. Load-deflection response of the damaged bridge was compared with the intact bridge system, and the typical failure modes were described. Besides, the direct redundancy analysis results indicated that the present continuous twin-girder steel-concrete bridge can be classified as redundant. The concrete slab is considered as the significant member for redundancy of the two-girder steel-concrete composite bridges.

Original languageEnglish
Publication statusPublished - 1 Jan 2013
MoE publication typeNot Eligible
EventEast Asia-Pacific Conference on Structural Engineering and Construction - Sapporo, Japan
Duration: 11 Sept 201313 Sept 2013
Conference number: 13


ConferenceEast Asia-Pacific Conference on Structural Engineering and Construction
Abbreviated titleEASEC


  • Composite bridge
  • FEM
  • Post-fracture
  • Redundancy
  • Two-girder bridge


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