Flexural Behaviour of Fibre-reinforced Prestressed Concrete Beams

The current study investigates the flexural behaviour of prestressed concrete beams reinforced with carbon fibre, glass fibre, and hybrid fibres under cyclic loading. Load–deflection responses, cracking patterns, and ductility parameters were analysed to assess fibre efficiency of different types of fibres. The control specimen showed a brittle failure at a relatively lower load, while carbon fibre mixes (CFRC) demonstrated a modest enhancement in strength and ductility. Glass fibre-reinforced specimens (GFRC) exhibited significant improvements, achieving higher load capacities and post-crack deformations. Hybrid fibre-reinforced concrete (HyFRC) specimen outperformed others, reaching highest load carrying capacity with superior ductility and crack control due to synergistic fibre action. The cracking behaviour transitioned from brittle to ductile in fibre mixes, highlighting improved toughness. Ductility ratio analysis confirmed the enhanced deformation capacity and resulting energy dissipation capacity in GFRC and HyFRC specimens. These findings support the potential of hybrid fibres in developing resilient high-performance prestressed concrete beams.