STRUCTURAL PERFORMANCE OF HYFRC BEAM REINFORCED WITH GFRP REBAR UNDER FLEXURE

ABSTRACT This paper presents the experimental study on the flexural behaviour of HYFRC beams reinforced with glass fiber reinforced polymer (GFRP) rebar and compared with normal steel reinforcement beams. Three beams reinforced with GFRP rebar and three beams of conventional concrete steel reinforced with totally six beams were casted and tested under two points loading. The companion specimens were casted along with beam and tested for concrete properties. Steel and glass fibres are used to improve the concrete property. From testing, load carrying capacity, load-deflection characteristics, crack pattern, crack width, concrete strains across cross section and failure mode were noted stiffness, ductility and energy dissipation capacity were also calculated. The average ultimate load carrying capacity of GFRP rebar and normal steel reinforcement beam is 125.8KN and 97.5KN respectively. The maximum deflection noted at their ultimate load in the GFRP rebar and normal steel reinforcement beam is 27.3 mm and 16.3 mm respectively. It was also observed that after load removal, deflected GFRP beam regain its original position and crack width also reduced. In steel beam, steel rebar were yielded, after load removal, no deflection regain and crack width reduction were found. Keywords: GFRP, Hybrid fibre, flexural testing, stiffness, ductility and energy dissipation capacity.