Structural performance of corroded RC beams repaired with CFRP sheets

A. H. Al-Saidy, A. S. Al-Harthy, K. S. Al-Jabri, M. Abdul-Halim, N. M. Al-Shidi

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Corrosion of reinforcement is a serious problem and is the main cause of concrete structures deterioration costing millions of dollars even though the majority of such structures are at the early age of their expected service life. This paper presents the experimental results of damaged/repaired reinforced concrete beams. The experimental program consisted of reinforced concrete rectangular beam specimens exposed to accelerated corrosion. The corrosion rate was varied between 5% and 15% which represents loss in cross-sectional area of the steel reinforcement in the tension side. Corroded beams were repaired by bonding carbon fiber reinforced polymer (CFRP) sheets to the tension side to restore the strength loss due to corrosion. Different strengthening schemes were used to repair the damaged beams. Test results showed detrimental effect of corrosion on strength as well as the bond between steel reinforcement and the surrounding concrete. Corroded beams showed lower stiffness and strength than control (uncorroded) beams. However, strength of damaged beams due to corrosion was restored to the undamaged state when strengthened with CFRP sheets. On the other hand, the ultimate deflection of strengthened beams was less than ultimate deflection of un-strengthened beams.

Original languageEnglish
Pages (from-to)1931-1938
Number of pages8
JournalComposite Structures
Volume92
Issue number8
DOIs
Publication statusPublished - Jul 2010

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Keywords

  • Advanced composite materials
  • CFRP sheets
  • Corrosion
  • Rehabilitation
  • Retrofitting
  • Strengthening

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ceramics and Composites

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