Electromagnetic Shunt Damper for Bridge Cable Vibration Mitigation: Full-Scale Experimental Study
Publication: Journal of Structural Engineering
Volume 146, Issue 1
Abstract
Long bridge cables are vulnerable to unanticipated large vibrations induced by earthquakes, wind, and traffic loads. The use of various dampers, including inerter dampers (IDs), as an effective approach for the mitigation of cable vibration has been extensively studied in recent years. This work presents an innovative strategy wherein an electromagnetic shunt damper (EMSD) is applied to emulate the mechanical behavior of traditional IDs. The proposed EMSD–ID design exploits analogous relationships between mechanical and electrical systems and provides unprecedented efficiency and flexibility in exerting large inertance. A full-scale EMSD–ID prototype was designed and fabricated, and its effective control performance was verified in a laboratory experiment involving a cable-stayed bridge model with a length of 135 m.
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Acknowledgments
The first three authors are grateful for the financial support from the Research Grants Council of Hong Kong through a General Research Fund (GRF) grant (Project No. PolyU 152222/14E) and through a Research Impact Fund (Project No. PolyU R5020-18), as well as from the Hong Kong Polytechnic University (Project No. G-YBPZ). The fourth author acknowledges the National Natural Science Foundation of China (Grant No. 51508217). The findings and opinions expressed in this paper are from the authors alone and are not necessarily the views of the sponsors.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 1 • January 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Nov 21, 2018
Accepted: May 15, 2019
Published online: Oct 30, 2019
Published in print: Jan 1, 2020
Discussion open until: Mar 30, 2020
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