Driving Performance of Vibratory-Installed Hollow FRP Piles in Sand

ABSTRACT: Fiber-reinforced polymer (FRP) piles provide a durable alternative to traditional materials, offering corrosion resistance, high strength-to-weight ratio, and low maintenance cost. However, their low axial stiffness and the absence of standardized installation guidelines pose challenges to their widespread use. This study examines the installation of hollow FRP piles using vibratory driving method in sandy soils. Ten piles, each with a 254 mm outer diameter, 6.5 mm wall thickness, and 2 m embedded length, were installed to evaluate installation resistance and driving performance. Two piles were instrumented to monitor stress during installation, which provided valuable insights into their behavior under vibratory driving. The findings enhance the understanding of FRP pile drivability and contribute to the development of standardized installation guidelines. This research supports the broader application of FRP piles in marine and coastal environments, where their durability and resistance to environmental degradation are crucial for long-term structural performance.