Axial Compressive Performance of Reinforced-Concrete Columns Strengthened with Carbon Fiber Reinforced Polymer Sheets

Abstract

This study investigates the axial behavior of short rectangular reinforced concrete columns strengthened with carbon fiber reinforced polymer (CFRP) sheets, with a focus on the effect of different levels of confinement and CFRP layers. The dimensions of the columns are 250×250×1000 mm. with a steel reinforcement ratio of 3.0% and externally CFRP bonded strengthening. Load-carrying capacity and failure mode are examined experimentally in this work. The results show that partial confinement with three layers of stirrups produces the highest increase in ultimate axial strength, at 23.2% compared to the control column. The failure mode for all specimens is due to concrete failure.