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 contributionScientificpeer-review

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
Subtitle of host publicationBridges and Structures Sustainability - Seeking Intelligent Solutions - Report
Pages675-682
Number of pages8
ISBN (Electronic)9783857481420
Publication statusPublished - 1 Jan 2016
MoE publication typeA4 Article in a conference publication
EventIABSE Conference Guangzhou: Bridges and Structures Sustainability - Seeking Intelligent Solutions - Guangzhou, China
Duration: 8 May 201611 May 2016

Publication series

NameIABSE Conference, Guangzhou 2016: Bridges and Structures Sustainability - Seeking Intelligent Solutions - Report

Conference

ConferenceIABSE Conference Guangzhou: Bridges and Structures Sustainability - Seeking Intelligent Solutions
CountryChina
CityGuangzhou
Period08/05/201611/05/2016

Keywords

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

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