Application of Aluminum Alloy Cap in Bridge Bearings

Abstract

In order to improve the combination form of friction pairs of existing bridge bearings and improve the durability of bridge bearings, this paper investigates the technical status and development trend of bridge spherical bearings at home and abroad, draws lessons from European standards, and puts forward a new friction pair of alloy spherical cap combination, which replaces the existing process of spherical cap coated stainless steel plate and chromium plating on the surface of spherical cap, and solves the environmental pollution, corrosion and peeling caused by chromium plating or coated stainless steelof spherical cap, the disadvantages of high line wear and easy to damage the wear plate. Through mechanical property test, line wear test andsalt spray test, the three processes are compared and analyzed, and the advantages of alloy spherical capare demonstrated. Its performance is better, the corrosion prevention is more durable, the manufacturing process is simple, and the mass production cost is low. Then the prototype is trial produced according to the standard, and the test meets the standard requirements, which further proves that the application of this technology to the bridge bearings can ensure the longer service life of the support and the safer bridge structure, This is also a new trend of market development for bridge bearings.