Behaviour of hybrid fibre reinforced polymer (HyFRP) laminates on high strength concrete (HSC) beams under flexural loading

Abstract

In this paper, experimental studies of hybrid fibre reinforced polymer (HyFRP) laminates consisting of carbon ply fibre reinforced polymer (CFRP) and glass ply fibre reinforced polymer (GFRP) are reported on in conjunction with studies of concrete beams with high strength (HSC) under the category of with and without HyFRP laminates. The aim of this experimental work is to examine how alternative sequences of CFRP and GFRP ply of hybrid FRPs effect the enhancement of the high strength concrete beams. For the purpose of this study, there are a total of seventeen HSC beams cast. One of the beams was cast without HyFRP to act as a guiding beam, and the residual sixteen beams were cast with HyFRP using reinforced concrete and various combinations of carbon ply fibre reinforced polymer (CFRP) and glass ply fibre reinforced polymer (GFRP). The sequences in which hybrid FRP layers are attached serve as the primary variables in this test. Concrete with reinforcements after laminating beams with two, three, and even four layers of HyFRP, a load was applied in the form of static to the beams until they failed. The findings of the tests lead one to the conclusion that the repercussions of hybrid FRPs on the ductility of HSC beams are strengthened differently depending the order of the FRP layers.