Damping Performance of Two-Cable Hybrid System Equipped with Both Viscous Damper and HDR Damper
Publication: Journal of Bridge Engineering
Volume 28, Issue 9
Abstract
In cable-stayed bridges, a cross-tie solution is considered an effective measure to enhance the in-plane stiffness of main cables while the damping increment of main cables is achieved by installing dampers on the main cables. However, the performance of passive viscous dampers reduces because of constraints on the installation location and the influence of ambient temperature. Recently, the cumulative benefits of cross-ties and external dampers have been explored by several researchers. The current study is motivated to explore the combined effect of the viscous damper and the high-damping-rubber (HDR) damper in a cable network. An analytical approach is used to develop a mathematical model of a two-cable network by installing the viscous damper on Main Cable 1 and the HDR damper on Main Cable 2. The effect of key system parameters is explored to observe the performance of an HDR damper in a two-cable hybrid system. Two numerical examples are presented to discuss the damping of the first 10 modes in a two-cable network equipped with both a viscous damper and an HDR damper. It is observed that stiffer cross-ties are a better choice in achieving the higher damping ratio in the fundamental mode of a two-cable network. Similarly, the performance of the HDR damper can also be increased by installing it on the neighboring cable with a high-frequency ratio.
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Acknowledgments
The author is grateful to FAST National University of Computer and Emerging Sciences Faculty for the Research Support Grant that supported this project.
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Published In
Journal of Bridge Engineering
Volume 28 • Issue 9 • September 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Mar 9, 2022
Accepted: Mar 21, 2023
Published online: Jun 20, 2023
Published in print: Sep 1, 2023
Discussion open until: Nov 20, 2023
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