Parametrically excited oscillation of stay cable and its control in cable-stayed bridges

Bing Nan Sun, Zhi Gang Wang, J. M. Ko, Yiqing Ni

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

This paper presents a nonlinear dynamic model for simulation and analysis of a kind of parametrically excited vibration of stay cable caused by support motion in cable-stayed bridges. The sag, inclination angle of the stay cable are considered in the model, based on which, the oscillation mechanism and dynamic response characteristics of this kind of vibration are analyzed through numerical calculation. It is noted that parametric ally excited oscillation of a stay cable with certain sag, inclination angle and initial static tension force may occur in cable- stayed bridges due to deck vibration under the condition that the natural frequency of a cable approaches to about half of the first model frequency of the bridge deck system. A new vibration control system installed on the cable anchorage is proposed as a possible damping system to suppress the cable parametric oscillation. The numerical calculation results showed that with the use of this damping system, the cable oscillation due to the vibration of the deck and/or towers will be considerably reduced.
Original languageEnglish
Pages (from-to)13-20
Number of pages8
JournalJournal of Zhejiang University: Science
Volume4
Issue number1
DOIs
Publication statusPublished - 1 Jan 2003

Keywords

  • Cable-stayed bridge
  • Parametric vibration
  • Stay cable
  • Support excitation
  • Vibration control

ASJC Scopus subject areas

  • Engineering(all)

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