EXPERIMENTAL STUDY ON REINFORCED CONCRETE COLUMNS HAVING WING WALLS RETROFITTED WITH CONTINUOUS FIBER SHEETS

Abstract

In this paper the results of the test, which was carried out using a total of 16 specimens of reinforced concrete columns having wing walls retrofitted with continuous fiber sheets as shear reinforcement, are described. The specimens before retrofit were designed by the old Japanese seismic code before 1971. The primary test variables were the widths of the wing walls, the kind of the fiber in the sheets and its amount as shear reinforcement. It was observed that all specimens failed in shear mode except one specimen and that the ultimate shear strengths increased linearly in proportion to the amount of the fiber as shear reinforcement. Based on the test results, an equation to evaluate the ultimate shear strengths of RC columns having wing walls retrofitted with continuous fiber sheets is proposed.