Research on flexural performance of damaged RC beams strengthened by FPR plates

Abstract

Combining two technologies of pasting fiber reinforced composite board (FRP) and externally reinforced steel plate concrete structure, fiber-reinforced composite material and steel plate composite reinforced concrete structure technology can effectively improve the stress performance of concrete reinforced structure. To explore the effect of the new technology steel plate anchoring FRP slab concrete beams and the effect of different damage levels on the reinforcement effect, in this paper, the author made 3 FRP reinforced beams with damage rates of 20%, 40%, and 60%, 1 RC beam with FRP plate only and an ordinary RC beam to analyze the reinforcement effect of the new process steel plate anchored FRP plate and the bearing capacity and plastic performance of the reinforced beam with different damage rates. The results show that the new technology steel plate anchoring FRP plate reinforcement technology can effectively prevent the occurrence of early peeling failure, improve the ductility and bearing capacity of the reinforced beam, and significantly increase the utilization rate of the FRP plate; as the damage rate increases, the ultimate bearing capacity of the reinforced beam increases, but the ductility is significantly reduced.

CFRP U-Wraps and Spike Anchors for Enhancing the Flexural Performance of CFRP-Plated RC Beams

“…FRPs have various forms (sheets, plates, and bars) that are utilized depending on the structural application. Externally bonding FRP plates to the beam’s soffit is commonly used to enhance the flexural capacity of RC beams; such beams are referred to as FRP-plated beams [ 8 , 9 , 10 , 11 , 12 ]. In practice, the imperfection of the workmanship in placing externally bonded FRP sheets and plates may result in defects and consequently affect the performance of the beam.…”