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.
