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A parametric analysis of the flutter instability for long span suspension bridges

  • Como, M. (Department of Civil Engineering, University of Tor Vergata) ;
  • Ferraro, S. Del (Department of Civil Engineering, University of Tor Vergata) ;
  • Grimaldi, A. (Department of Civil Engineering, University of Tor Vergata)
  • 투고 : 2002.12.06
  • 심사 : 2004.09.29
  • 발행 : 2005.02.25

초록

A simplified analysis able to point out the most relevant geometrical and aerodynamic parameters that can influence the flutter of long span modern bridges is the aim of the paper. With this goal, by using a continuous model of the suspension bridge and by a quasi stationary approach, a simple formula of the combined vertical/torsional flutter wind speed is given. A good agreement is obtained comparing the predictions from the proposed formula with the flutter speeds of three modern suspension or cable stayed bridges: the Great Belt East Bridge, the Akashi and Normandie bridges. The paper ends with some comments and comparisons with the well known Selberg formula.

키워드

참고문헌

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  6. Larsen, A. (1993), "Aerodynamics aspects of the final design of the 1624 m suspension bridge across the Great Belt", J. Wind Eng. Ind. Aerodyn., 48, Elsevier.
  7. Scanlan, R.H. (1971), "Airfoil and bridge deck flutter derivatives", J. Eng. Mech. Div.; Proc. of the American Society of Civil Engineers: 1717-1737, December 1971.
  8. Selberg, A. (1961), "Oscillation and aerodynamic stability of suspension bridges", Acta Polytech. Scan. Civil Eng. Build. Constr. Series N.13. Trondheim.
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