A Damper System for Mitigation of Suspension Bridge Flutter

This paper describes a floating system that uses a continuous girder between two anchor blocks for increasing the span length of suspension bridges. The flutter instability of the floating system due to winds is of great critical interest. This paper proposes a new control system that is designed to mitigate the flutter of the floating-type suspension bridge. The proposed control system consists of vertical dampers installed between the pylons and the bridge deck. The linear evaluation model is developed using the equations of motion generated around the deformed equilibrium position. Using the analytical model, performance of the proposed control systems is studied and compared to a traditional system with joints at the pylons. The paper shows that the proposed control system improves the overall stiffness and stability of the bridge. A control strategy using semi-active or active dampers is also proposed to enhance the controllability of the floating-type suspension bridge against flutter instability.

  • Availability:
  • Corporate Authors:

    International Association for Bridge and Structural Engineering

    ETH-Honggerberg, Wolfgang-Pauli-Strasse 15
    Zurich 8093,   Switzerland  CH-8093
  • Authors:
    • Hwang, Inho
    • Son, Yunki
    • Lee, Hu Seok
    • Hong, Sang Hyun
    • Yoo, Dongho
    • Lee, Jong Seh
  • Conference:
  • Publication Date: 2008


  • English

Media Info

  • Media Type: Print
  • Features: Figures;
  • Pagination: pp 76-77
  • Monograph Title: 17th Congress of IABSE. Creating and Renewing Urban Structures. Tall Buildings, Bridges and Infrastructure

Subject/Index Terms

Filing Info

  • Accession Number: 01357829
  • Record Type: Publication
  • ISBN: 9783857481185
  • Files: TRIS
  • Created Date: Nov 29 2011 2:52PM