Vibration Analysis of Cables in Cable-Stayed Bridges due to Moving Loads
Date Issued
2004
Date
2004
Author(s)
Chen, Li-Jen
DOI
en-US
Abstract
Cables play an important role in the load-carrying system of cable-stayed bridges. Surprisingly, the problem of vehicle-induced vibration of cables mounted on cable-stayed bridges or, specifically, the problem of cable vibration induced by support motions, received only very limited attention from researchers. Based on the governing differential equation of a cable with initial tension, an exact solution was derived for the cable with support motions, considering the contribution of flexural rigidity. Such a solution is then extended to the analysis of vibration of cables mounted on a cable-stayed bridge under the moving loads, with the support motions of the cables made available by a finite element analysis carried out in advance for the entire bridge.
Conventionally, the arrangement of cables is chosen primarily based on the aesthetic considerations, while the corresponding dynamic property of the cables is seldom considered, partly due to the lack of a simple approach for analyzing the cable vibrations. To fill the gap, the influence of arrangement of cables on cable vibration will be investigated in this study, based on the proposed analysis procedure. Furthermore, the dynamic behavior of cables in cables-stayed bridges under serial moving loads will also be studied, from which it is concluded that the responses of cables in cable-stayed bridges will be amplified, when the frequency of the cable concerned coincides with any of the bridge or excitation frequencies. The results presented herein are useful for the design of bridges aimed at reducing the cable vibrations.
Subjects
斜張橋
共振
撓曲勁度
車橋互制
振動
纜索
纜索佈置
cable
cable arrangement
cable-stayed bridge
resonance
vehicle-bridge interaction
flexural rigidity
vibration
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-93-R91521205-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):4d68a415b932b5e7f3c184b342c46db7