Abstract
This paper presents the results of an experimental study on flexural behaviour of reinforced concrete (RC) beams strengthened with carbon fibre (CF)-reinforced plastic sheets. The CF sheets were bonded on the soffit of the beam using epoxy resin adhesive. Six medium-sized RC beams were tested in bending to evaluate reinforcing effects of the CF sheets. A large-sized RC beam which was initially crack-damaged by pre-loading and subsequently repaired by injection of epoxy resin was also tested to simulate the performance in real structures. The results indicated that the flexural rigidity and strength of the RC beams are increased by reinforcing with the CF sheets. Beneficial reinforcing effects were also observed for the crack-damaged RC beam.
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