Abstract
Footbridges often have a lightweight and slender design. As a result, they tend to be susceptible to human-induced vibrations. In this paper, the application of the twin rotor damper (TRD), an active mass damper consisting of two eccentrically rotating masses, for the control of human-induced footbridge vibrations is presented. A proof-of-concept prototype is developed for a real-world slender steel footbridge that is sensitive to human-induced vibrations. First, a numerical study is performed to design a TRD to mitigate human-induced vibrations. Based on these results, a TRD prototype was designed and built. Second, the performance of the TRD is evaluated on-site. The response of the footbridge to human-induced loading is measured under both uncontrolled and controlled conditions and compared to corresponding numerical simulations. The measurements confirm the results of the numerical simulations. They show that the TRD prototype is able to effectively damp human-induced vibrations of a real-world footbridge and validate the TRD design.
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Acknowledgments
The third author is a postdoctoral fellow of the Research Foundation Flanders (FWO). The financial support is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 146 • Issue 7 • July 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Dec 14, 2018
Accepted: Nov 18, 2019
Published online: Apr 22, 2020
Published in print: Jul 1, 2020
Discussion open until: Sep 22, 2020
ASCE Technical Topics:
- Analysis (by type)
- Bridge engineering
- Bridges
- Bridges (by type)
- Business management
- Continuum mechanics
- Damping
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Foot bridges
- Human and behavioral factors
- Materials engineering
- Metals (material)
- Models (by type)
- Motion (dynamics)
- Numerical analysis
- Numerical models
- Practice and Profession
- Rotation
- Solid mechanics
- Steel
- Structural dynamics
- Structural engineering
- Vibration
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