Structural performance of corroded RC beams repaired with CFRP sheets

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 rei...

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Bibliographic Details
Published in:Composite structures 2010-07, Vol.92 (8), p.1931-1938
Main Authors: Al-Saidy, A.H., Al-Harthy, A.S., Al-Jabri, K.S., Abdul-Halim, M., Al-Shidi, N.M.
Format: Article
Language:English
Subjects:
Advanced composite materials
Applied sciences
Beams (structural)
Building failures (cracks, physical changes, etc.)
Building structure
Buildings. Public works
Carbon fiber reinforced plastics
CFRP sheets
Composites
Construction (buildings and works)
Corrosion
Corrosion mechanisms
Damage
Durability. Pathology. Repairing. Maintenance
Exact sciences and technology
Forms of application and semi-finished materials
Metals. Metallurgy
Polymer industry, paints, wood
Rehabilitation
Reinforced concrete
Reinforced concrete structure
Reinforcement
Reinforcing steels
Retrofitting
Strength
Strengthening
Technology of polymers
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Summary: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.
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2010.01.001