Active Deformation Control of Bridges Prestressed with Aramid Fiber ReinforcedPlastic (AFRP) Cables

摘要

One of the major problems the construction industry faces today is low corrosionresistance of reinforcing and prestressing steel, which significantly affects the durability of concrete structures. Theoretically fiber reinforced plastics (FRPs) can successfully be used in concrete structures, in lieu of steel, as reforcing and/or prestressing elements, owing to high tensile strength, immunity towards corrosion, low Young's modulus, light weight and high fatigue resistance. This investigation was conducted to establish the feasibility of using Aramid FRP (AFRP) cables as reinforcing/prestressing elements in concrete bridge structures. Besides investigating durability of AFRP cables in adverse environments (alkali and seawater), static and ultimate load tests were performed on single Double-Tee beam, together with static, fatigue and ultimate load tests on a half scale model Double-Tee beam bridge system prestressed with AFRP.