Strengthening of RC T-beams with low concrete strength using CFRP

Various methods improved for strengthening RC beams against shear. Recently, external bonding of carbon fiber reinforced polymer (CFRP) to RC beams was very popular and successfully technique. This study present test result on strengthening of shear deficient RC beams with low concrete strength by external bonding of CFRP sheet and straps. The experimental program consisted of 6 T-section RC beams. These beams were tested under cyclic loading. The parameters investigated in this study included width of the CFRP straps, arrangements of CFRP strap along the shear span and anchorage technique. The test results show that CFRP members improved the strength and siffness of beams significantly. The failure mode and ductility of specimens change depend on the CFRP strap width, arrangement along the beam and anchorage technique. Key Words : Reinforced concrete beam, shear, strengthening, CFRP, cyclic load, anchorage