ANALYSIS ON RETROFITTING OF REINFORCED BEAM-COLUMN JOINTS USING HYBRID FRP

Abstract

Beam-column junctions are key zones in reinforced concrete structures that are particularly vulnerable to earthquake stresses. As a result, strengthening the beam-column joint is critical in order to save the structure and its people in the event of seismic pressures. Throughout the world, several retrofitting projects utilising fibre reinforced polymer (FRP) composites are being carried out. The purpose of this study is to look at the efficiency of retrofitting beam-column junctions with a hybrid combination of Carbon Fiber Reinforced Polymer (CFRP) and Glass Fiber Reinforced Polymer (GFRP). To assess the performance of the original and improved joint models, nonlinear finite element analysis was used. The performance has been investigated in terms of load carrying capacity, deflection, failure pattern and displacement ductility. On the hybrid FRP system, parameters such as different combinations and length variations are investigated. According to the findings, hybrid FRP is far more effective than monolithic CFRP and GFRP. And length variations have a significant impact on retrofitting capacity; as the area of retrofitting increases, so does the capacity. While retrofitting ability does not change with changes in layer placements, it is mostly determined by the composition ratio of hybrid materials utilised.