Several researches have been carried out on reinforced concrete beams strengthened with fiber reinforced polymer composite. Some of the works focused on shear strengthening compared with flexural strengthening that had the largest share. This paper reviews 10 articles on carbon fiber reinforced polymer strengthened reinforced concrete beams. Finally, this paper attempts to address an important practical issue that is encountered in shear strengthening of beams with carbon fibre reinforced polymer laminate. This paper also proposes a simple method of applying fibre reinforced polymer for strengthening the beam with carbon fibre reinforced polymer.

This paper presents experimental results of four prismatic concrete reinforced beam and strengthened by NSM (Near surface mounted) FRP (Fiber Reinforced Polymer) reinforced technique, with additional roots planted in the concrete. The strengthening technique causes load capacity of beams to increase from (6%-8%).A decrease in mid-span deflection was also observed from (4%-5%).Using this technique gave increasing in flexural beam resistant under the same conditions and this increasing was also noted in shear beam resistant.

Carbon fiber reinforced polymer (CFRP) is a material suitable for strengthening the reinforced concrete (RC) beams. Although many in situ RC beams are of continuous constructions, there has been very limited research on the behavior of such beams with externally applied FRP laminate. In addition, most design guidelines were developed for simply supported beams with external FRP laminates. This paper presents the results of a test program for shear strengthening characteristics of strips bidirectional flexible carbon-fiber polymer sheets bonded to reinforced concrete (RC) continuous beams. A total of three beams with size of 150 × 320 × 3650 mm, flange width = 400 mm and flange thickness = 120 mm concrete beams were tested and various sheet configurations and layouts were studied to determine their effects on the ultimate shear strength and shear capacity of the beams. From the test results, it was found that all schemes were found to be effective in enhancing the shear strength of RC beams. It was observed that the strength increases with the number of sheet layers, which provided the most effective strengthening for RC continuous T-beam. Beam strengthened using this scheme showed a 23.21 % increase in shear capacity as compared to the control beam. Two prediction models available in the literature were used for computing the contribution of CFRP strips and compared with the experimental results.