Influence of Girder Vibration on Cable Damper¡¯s Performanceof A Cable-stayed Bridge

Dong Liang^1,2, Yong Chen³

(1. Dept. of Civil Engineering, Hebei University of Technology, Tianjin 300130, China; 2. Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China; 3. Dept. of Civil Engineering, Zhejiang University, Hangzhou 310027, China)



Abstract:

The model combined by cable, girder and damper is founded to study the influence of girder vibration on cable damper¡¯s performance of a cable-stayed bridge. The complex mode method and nondimensionalization are used to analyze the relationship between the girder¡¯s parameters and the performance of cable-related damper. The results indicate that the performance of cable-related damper will decrease greatly when the girder frequencies are near the frequencies of cable. The smaller absolute displacement of damper¡¯s piston caused by the very small vibration phase shift of girder and cable is the physical cause of the negative impact mentioned above.

Key words:  cable-stayed bridge, vibration mitigation of cable, girder vibration, modal damping, complex mode method, cause analysis

DOI£º10.11916/j.issn.1005-9113.2014.01.016

Clc Number:U441+.3

Fund: