Study of Passive Deck-Flaps Flutter Control System on Full Bridge Model. I: Theory
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Volume 128, Issue 3
Abstract
A passive aerodynamic control method for suppression of the wind-induced instabilities of a very long span bridge is presented in this paper. The control system consists of additional control flaps attached to the edges of the bridge deck. Control flap rotations are governed by prestressed springs and additional cables spanned between the control flaps and an auxiliary transverse beam supported by the main cables of the bridge. The rotational movement of the flaps is used to modify the aerodynamic forces acting on the deck and provides aerodynamic forces on the flaps used to stabilize the bridge. A time-domain formulation of self-excited forces for the whole three-dimensional suspension bridge model is obtained through a rational function approximation of the generalized Theodorsen function and implemented in the FEM formulation. This paper lays the theoretical groundwork for the one that follows.
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Information
Published In
Journal of Engineering Mechanics
Volume 128 • Issue 3 • March 2002
Pages: 264 - 279
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Aug 1, 2000
Accepted: Jul 20, 2001
Published online: Mar 1, 2002
Published in print: Mar 2002
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