Abstract
A prediction method for ductility of reinforced concrete columns retrofitted with externally-bonded continuous fiber sheet is related in this paper. The method is based on the mechanical model that represents experimentally observed deformation and failure behavior of RC column with CF sheet observed: generation and propagation of diagonal sheer crack in the member and delaminating of the CF sheet from concrete over the sheer crack. It was verified that ductility of the RC columns with CF sheet is well predicted by the proposed method in terms of their deformation and failure mechanisms. It was also clarified from sensitivity analysis using the prediction model that the ductility of the RC columns with CF sheet does not much depend on bonding characteristics of CF sheet from concrete but on the ultimate tensile strain of CF sheet.
