Repair of steel composite beams with carbon fiber-reinforced polymer plates

Abdullah H. Al-Saidy*, F. W. Klaiber, T. J. Wipf

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

145 Citations (Scopus)


One significant cause of deterioration of steel bridge structures is the corrosion due to extensive use of deicing salts in winter weather. The investigation presented in this paper focused on the behavior of steel composite beams damaged intentionally at their tension flange to simulate corrosion and then repaired with carbon fiber-reinforced polymer (CFRP) plates attached to their tension areas side. Damage to the beams was induced by removing part of the bottom flange, which was varied between no damage and loss of 75% of the bottom flange. All beams were tested to failure to observe their behavior in the elastic, inelastic, and ultimate states. To help implement this strengthening technique, a nonlinear analytical procedure was also developed to predict the behavior of the section/member in the elastic, inelastic, and ultimate states. The test results showed a significant increase in the strength and stiffness of the repaired beams, Through the use of CFRP plates, all damaged beams were fully restored to their original (undamaged state) strength.

Original languageEnglish
Pages (from-to)163-172
Number of pages10
JournalJournal of Composites for Construction
Issue number2
Publication statusPublished - Mar 2004


  • Composite beams
  • Composite materials
  • Fiber reinforced polymers
  • Girders
  • Plates
  • Rehabilitation
  • Steel

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Mechanical Engineering


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