Abstract
For rapid repair and strengthening of steel members, carbon fiber reinforced polymer (CFRP) strips can be conveniently used. However, their deboding mechanism and design parameters are still to be clarified to prevent any debonding problem. Bending tests of steel plates with bonded CFRP strips are carried out to see the debonding stresses and failure mechanism. Then, differential equations are derived to express axial and shear forces in CFRP strip and steel plate, as well as shear and normal stresses in adhesive. It is shown that the debonding strength of CFRP bonded to steel plate in bending can be evaluated by the maximum principal stress developed in adhesive at the end of the CFRP strips.
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