After-fracture redundancy analysis of an aged truss bridge in Japan

Weiwei Lin, Heang Lam, Teruhiko Yoda*, Haijie Ge, Ying Xu, Hideyuki Kasano, Kuniei Nogami, Jun Murakoshi

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

In the next 20years, more than half of the bridges in Japan would be in service for more than 50years. These include truss bridges those are generally consideredto benon-redundantand fracture critical. With ageing, these bridges are facing an increasing risk of bridge collapse under extreme conditions.Therefore, it is essential to evaluate alternate load paths on existing bridge structures to avoid bridge collapse or replacement. In this paper, after-fracture redundancy of truss bridges is investigated through a case study for a five-span continuous truss bridge. Field tests were performed, and the displacements on key sections were measured in the test. According to the experimental observations and test results, a numerical model capable of simulating the present truss bridge was built and was used to investigate the after-fracture redundancy of the target bridge. Fracture of truss members in typical locations was considered in the numerical analyses, and the R' values of both intact and damaged trusses were compared. On the basis of the numerical results, a critical member in this bridge was also determined.

Original languageEnglish
Pages (from-to)107-117
Number of pages11
JournalSTRUCTURE AND INFRASTRUCTURE ENGINEERING
Volume13
Issue number1
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Redundancy
  • truss bridge
  • field test
  • FEM analysis
  • member fracture
  • RELIABILITY

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