Estimation of Shear Carrying Capacity on Concrete Beams, Reinforced with FRP Rods

J. Ocean Eng. Technol. 2004;18(1):63-68.

FRP Rods로 보강한 콘크리트 보의 전단 내하력의 평가

최익창,연준희,고재용

목포해양대학교 해양토목공학과,대운종합 건설,목포해양대학교 해양조선공학과

Keywords: FRP Rods FRP, Diagonal Crack, Failure Mode, Shear Carrying Capacity

핵심용어: 봉부재, 사인장균열, 파괴형태, 전단내하력

Abstract

The purpose of this study is to estimate the contribution of concrete and shear reinforcement, in shear carrying capacity, on concrete beams, reinforced with steel and/or FRP rods. The experimental tests for 12 concrete beams, reinforced with steel and/or FRP rods, are carried out. Experimental parameters includes the mechanical properties of reinforcements in shear and bending, and the ratio of shear reinforcement. This study compares the experimental results of shear carrying capacity in concrete beams, reinforced with steel and/or FRP rods, with the proposed equations. According to the experimental results, the effect of the concrete in concrete beams reinforced with FRP rods is decreased with decreasing Young's modulus of longitudinal tensile reinforcement. This results from the large deflection of concrete beams reinforced with decreasing Young's modulus of longitudinal tensile reinforcement. Also, the contribution of shear reinforcement is smaller than the calculated value, using the truss analogy. This results from the fact that the stress redistribution is not exhibited after the break of shear reinforcement.