Dynamic response of fiber-reinforced polymer laminated bamboo lumber beams under cyclic loading

This study investigates the significant role of Fiber Reinforced Polymer reinforcement in enhancing the mechanical properties of laminated bamboo lumber beams under cyclic loading. Various types of Fiber Reinforced Polymer, including Carbon Fiber Reinforced Polymer, Glass Fiber Reinforced Polymer, and Basalt Fiber Reinforced Polymer, along with different sheet ratios, are examined to determine their impact on stiffness, energy dissipation, ultimate load capacity, and deformation modes. The research establishes theoretical models to predict the ultimate flexural deflection of laminated bamboo lumber beams and validates these models through experimental comparison. The results demonstrate that Fiber Reinforced Polymer reinforcement significantly improves the structural performance of laminated bamboo lumber beams, with Glass Fiber Reinforced Polymer providing a 22.7 % increase in stiffness and Carbon Fiber Reinforced Polymer exhibiting a 93.7 % increase in energy dissipation capacity compared to unreinforced specimens. Additionally, Fiber Reinforced Polymer- reinforced specimens show altered deformation modes, with more stable hysteretic behaviour and reduced crack propagation, delaying failure onset. These findings highlight the transformative potential of Fiber Reinforced Polymer in reinforcing bamboo structures, enhancing their resilience and sustainability for modern construction applications.