Comparative study of continuously reinforced concrete pavement (CRCP) using GFRP and reinforcing bars: comprehensive review and numerical analysis

Glass fiber-reinforced polymer (GFRP) bars are increasingly recognized as a promising alternative to conventional steel reinforcement in concrete structures due to their corrosion resistance, high tensile strength, and eco-friendly production. Their application in continuously reinforced concrete pavement (CRCP) systems offers an opportunity to leverage these advantages. However, challenges remain, including GFRP’s relatively low elastic modulus, thermal incompatibility with concrete, and manufacturing limitations. To address these issues, this study integrates a comprehensive literature review with three-dimensional finite element simulations. The review highlights GFRP’s superior durability against chloride-induced corrosion and its ability to reduce local stress concentrations. Nonetheless, concerns remain regarding its lower stiffness, which may result in increased deflection and crack width in flexural members. Numerical analyses further suggest that the reduced modulus of GFRP lowers effective stresses, thereby potentially mitigating horizontal cracking. Consequently, GFRP bars demonstrate considerable promise as a substitute for conventional steel in CRCP applications. This study provides insights into the structural feasibility and performance benefits of GFRP reinforcement in pavement systems, contributing to the development of more durable and corrosion-resistant designs.