Novel Method for Retrofitting Superstructures and Piers in Aged Steel Railway Bridges

Weiwei Lin*, Nozomu Taniguchi, Teruhiko Yoda

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review


Deterioration of aging bridges is a serious problem that affects their serviceability and durability. Appropriate repair, strengthening, or replacement work should be performed on aged bridge structures to ensure they remain in good condition. A novel strengthening method using rubber-latex mortar, glass-fiber-reinforced polymer plates, lightweight rapid-hardening concrete, and reinforcement bars is proposed in this article. The strengthening method can be used to strengthen both steel railway bridge superstructures and piers. To confirm the effectiveness of the strengthening method, field tests on a short-span railway bridge and laboratory tests on longitudinal-lateral beam connections and steel piers were performed. Because the structural stiffness of aged steel structures is directly related to the fatigue performance and the seismic behavior of steel piers, the applied load versus displacement and strain responses of the test specimens were of primary interest in the tests. Strain results at key sections were experimentally measured and are reported in this paper. According to the experimental results, the present renovation method can significantly enhance the rigidity and reduce the stress levels in bridge girders, connections, and piers, resulting in the extension of the residual service life of such structures. (C) 2017 American Society of Civil Engineers.

Original languageEnglish
Article number05017009
Number of pages10
Issue number11
Publication statusPublished - Nov 2017
MoE publication typeA1 Journal article-refereed


  • Strengthening
  • Fatigue service life
  • Railway superstructures
  • Steel connections
  • Steel piers

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