Scanning the modal coupling of slender suspension footbridges by a virtual moving vehicle
學年 107
學期 2
出版（發表）日期 2019-02-01
作品名稱 Scanning the modal coupling of slender suspension footbridges by a virtual moving vehicle
作品名稱（其他語言）
著者 YB Yang; JD Yau; S. Urushdaze
單位
出版者
著錄名稱、卷期、頁數 Engineering Structures 180, p.574-585
摘要 In this paper, the modal coupling mechanism is studied of a single-span footbridge consisting of a suspended beam (i.e., bridge deck), two suspension cables (via hangers) and two wind guys (via wind ties). To start, the governing equations for the slender suspended beam are derived based on the linearized deflection theory for classical suspension bridges, which is followed by two parts. First, the free vibration analysis is conducted to obtain the modal frequencies and modal shapes of the suspended beam by Galerkin’s method, from which the key parameters dominating the flexural-torsional coupled vibrations are identified, along with measures for stiffness enhancement. Then, a virtual eccentrically moving vehicle is first attempted to scan (i.e. extract) the vibration messages of the suspended beam from a perspective that allows us to physically interpret the dominant mode of the flexural-torsional coupling of the beam in an easy way. The objective of this study is twofold: first to offer a complete nonlinear vibration theory for the suspension footbridge, and second to physically interpret the complicated mechanism of coupling involved.
關鍵字 Footbridge;Free vibration;Linearized deflection theory;Moving vehicle;Torsional-flexural coupling
語言 zh_TW
ISSN
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者 JD YAU
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/116025 )