Experimental study of the effect of CFRP string on shear reinforcement of reinforced concrete beams

External shear reinforcement of reinforced concrete beams, generally using carbon fiber reinforced polymer in the form of a wrap. So that the maximum existing beam reinforcement can only be installed on 3 faces. In this study, shear reinforcement was tried using strings whose installation was similar to stirrups. So that when used to strengthen existing beams, it can be assisted by making holes in the floor plate with a drill. The formulation of the string shear reinforcement is approached with a 4 face wrap shear reinforcement formulation. The research was conducted on 3 beams, 1 beam without shear reinforcement, 2 beams shear reinforced with strings with the same in area per unit length of distribution. The string distribution distance of 2 beams are different. The test results show that the increase in shear strength of the two shear reinforcement beams is the same only differs in ductility. The real increase in shear strength is much smaller than the increase in the shear strength of the approach formulation.