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Strengthening of Reinforced Concrete Beams with Carbon FRP.


pdf icon Strengthening of Reinforced Concrete Beams with Carbon FRP. (325 K)
Duthinh, D.; Starnes, M. A.

Composites in Constructions. 2001, Swets and Zeitlinger, Lisse, 2001.

Keywords:

reinforced concretes; beams; carbon; anchorage; carbon fibers; ductility; flexure; fiber-reinforced polymers; repair; strengthening

Abstract:

Seven concrete beams reinforced internally with steel and externally with carbon fiber-reinforced polymer (FRP) laminate applied after the concrete had cracked were tested under four-point bending. Results show that FRP is very effective for flexural strengthening. As the amount of steel increases, the additional strength provided by the carbon decreases. Compared to a beam reinforced heavily with steel only, the beams reinforced with both steel and carbon have adequate deformation capacity, in spite of their brittle mode of failure. Clamping or wrapping of the ends of the FRP laminate combined with adhesive bonding is effective in anchoring the laminate.