Effect of Rotational Restraint at Damper Location on Damping of a Taut Cable with a Viscous Damper
Publication: Journal of Bridge Engineering
Volume 25, Issue 2
Abstract
The installation of an external damper on a cable of a cable-supported bridge is often associated with attachments or support devices that trigger vibration restraints at the damper location. This paper investigates the effect of rotational restraint at the damper location on additional damping of a taut cable with an installed viscous damper. An asymptotic solution is employed to derive the asymptotic form of cable complex eigenfrequencies and its damping ratio, in which the flexural rigidity of the cable and those damper restraints including rotational stiffness, damper stiffness, and support stiffness are taken into account. The investigation by a numerical example indicates that by considering rotational restraint, the additional damping of a cable is always lower than its values in the case of no rotational restraint.
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Acknowledgments
The authors acknowledge Professor Yozo Fujino, Yokohama National University, Japan and Dr. Hoang Nam, Ho Chi Minh City University of Technology, Vietnam for giving valuable comments on the asymptotic solutions in this study.
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Published In
Journal of Bridge Engineering
Volume 25 • Issue 2 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Mar 31, 2019
Accepted: Aug 29, 2019
Published online: Nov 25, 2019
Published in print: Feb 1, 2020
Discussion open until: Apr 25, 2020
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