Analysis of the efficiency in reducing stay cable vibrations using hydraulic dampers

Abstract

Stay cables are important elements in cable-stayed bridge. When the stay cable has a large length, it becomes sensitive to vibration problems, causing material fatiguethat reduces the durability and load-bearing capacity of the structure. To reduce vibrations of the stay cables, various damping devices are installed to enhance the damping performance, such as hydraulic dampers. Determining theparameters of the hydraulic damping device is essential to ensure effective vibration reduction. The paper presents the establishment of an analytical model for evaluating the efficiency of reducing stay cable vibrations using hydraulic dampers based on the finite element method. Based on this model, appropriate damping parameters for the stay cable are determined. The results of analysis are compared withexperimental field measurementsat My Thuan 2 cable-stayed bridge.