Plate girder bridge strengthened with multi-stepwise thermal prestressing method

J. H. Ahn, C. Y. Jung, K. T. Choi, Sang Hyo Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The strengthening of a plate girder bridge with external prestressing tendons is a commonly used method of upgrading existing bridges. Indeed, it has been known to offer advantages such behaviors as increased elastic behaviors under higher loading, increased ultimate resistance, and reduced deflection under service loads. However, this method has notable disadvantages such as stress concentration at anchorages and inefficient live load-carrying capacity. The thermal prestressing method (TPSM) for steel bridges proposed in this study uses thermal expansion and contraction of a cover-plate to provide a combination with the prestress effects of an external prestressing tendon and the section enlargement benefits of the external bonding method.In this study, the basic concepts of the proposed strengthening protocol using multi-stepwise TPSM are presented. The existence of the strengthening effect is well substantiated and the proposed analytical approach is also rigorously verified. The significant strengthening effects on a simply supported plate girder bridge are analyzed.

Original languageEnglish
Pages (from-to)431-444
Number of pages14
JournalAdvances in Structural Engineering
Volume14
Issue number3
DOIs
Publication statusPublished - 2011 Jun 1

Fingerprint

Plate girder bridges
Prestressing
Tendons
Steel bridges
Load limits
Thermal expansion
Stress concentration
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

Cite this

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Plate girder bridge strengthened with multi-stepwise thermal prestressing method. / Ahn, J. H.; Jung, C. Y.; Choi, K. T.; Kim, Sang Hyo.

In: Advances in Structural Engineering, Vol. 14, No. 3, 01.06.2011, p. 431-444.

Research output: Contribution to journalArticle

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