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Strengthening of Reinforced Concrete Beams with Carbon FRP



Dat Duthinh, M A. Starnes


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.
Journal of Composites for Construction


anchorage, beam, carbon fibers, ductility, flexure, FRP (fiber-reinforced polymers), reinforced concrete, repair, strengthening


Duthinh, D. and Starnes, M. (2001), Strengthening of Reinforced Concrete Beams with Carbon FRP, Journal of Composites for Construction, [online], (Accessed June 13, 2024)


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Created May 1, 2001, Updated February 19, 2017