Hybrid Strengthening of Reinforced Concrete Compressive Members Using Fiber-Reinforced Polymers

Abstract

This study investigates the behaviour of circular reinforced concrete columns under uniaxial compression load when reinforced with a hybrid fiber-reinforced cementitious matrix (FCM) and externally bonded fiber-reinforced polymer (EBF). Six reinforced columns and one control column made up the seven columns that were built. For strengthening, carbon or glass fiber-reinforced polymer (FRP) was employed. The principal purpose or goal of research is to assess the efficacy of combining fiber slippage prevention, FCM, and EBF strengthening techniques in enhancing deformation characteristics and mitigating the need for further FCM layers. The load-carrying capacity under uniaxial loading, load against axial deformation, and failure patterns are some of the important study factors. The results show that hybrid FRP-strengthened reinforced concrete columns have better ductility, better confinement, and higher ultimate capacity. By using external FRP bonding, this hybrid technique minimizes the requirement for FCM layers, which in turn minimizes the size of the reinforced column.