Abstract
Recently, many research reports have been published on the application of CFRP strips to repair and strengthening of steel members. CFRP strips often peel off from steel plates due to high shear stress, namely debonding shear stress, which is produced in the adhesive at the ends of CFRP strips. In this study, it is shown that the debonding shear stress is reduced by using a low elastic modulus adhesive around the ends of CFRP strips. Solving the differential equation regarding the stress of CFRP bonded steel plates with a low modulus adhesive around the ends of CFRP strips, the characteristics on the stress in steel plates and the debonding shear stress in the adhesive are clarified. The analytical results are confirmed by the tensile tests of steel plates with a low elastic modulus adhesive around the ends of CFRP strips.
