Fiber-Reinforced Polymers in Structural Design: A Comprehensive Insight of Innovations, Performance, and Future Prospects

Abstract: Fiber-reinforced polymers (FRP) have emerged as a transformative technology in structural design, offering enhanced durability, improved load-bearing capacity, and superior seismic performance compared to conventional reinforcement systems. This review provides a comprehensive insight into the innovations, performance, and future prospects of FRP applications in modern construction. The study critically examines FRP systems from a multi-scale perspective, integrating nano-enhancements at the fiber-matrix interface, mesoscale structural arrangements, and macro scale behavior under external loads. A rigorous methodological framework was adopted, combining extensive literature review, advanced computational simulations, and laboratory experiments. Experimental investigations focused on assessing load transfer mechanisms, debonding phenomena, and durability under cyclic and dynamic loading conditions, which are critical for seismic resilience. Finite element analysis and other numerical modeling techniques were employed to simulate the long-term performance of FRP-enhanced structures and to predict failure modes under diverse environmental and loading scenarios. These approaches enabled a detailed characterization of the structural behavior, bridging the gap between micro structural enhancements and overall system performance. The findings of this research reveal that innovative bonding techniques, surface treatments, and the incorporation of nano-scale materials significantly improve the interface properties and overall integrity of FRP systems. Multiscale modeling has demonstrated efficacy in elucidating the intricate interactions among the fiber, matrix, and interfacial zone, consequently facilitating a more comprehensive understanding of performance improvements. The study underscores that the integration of FRP in structural design not only optimizes strength and serviceability but also offers a sustainable alternative with potential reductions in maintenance costs and environmental impact. The research is significant because it lays the groundwork for standardized testing protocols and future investigations into eco-friendly FRP materials, thus addressing key challenges in durability, cost, and fire resistance. In summary, this comprehensive investigation not only advances our understanding of FRP innovations and performance but also charts a clear path for future research directions, ensuring that FRP systems continue to evolve and meet the demands of modern, resilient infrastructure.