Damping of Stay Cables by Semi-Active Friction Dampers
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Bibliographic Details
| Author(s): |
Mia Wagner
(Rambøll Denmark, Copenhagen, Denmark)
Martin Nymann Svendsen (Rambøll Denmark, Copenhagen, Denmark) Jan Høgsberg (Technical University of Denmark, Kongens Lyngby, Denmark) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Conference: Structural Engineering: Providing Solutions to Global Challenges, Geneva, Switzerland, September 2015 | ||||
| Published in: | IABSE Conference Geneva 2015 | ||||
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| Page(s): | 1476-1483 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2015 | ||||
| DOI: | 10.2749/222137815818358790 | ||||
| Abstract: |
This paper concerns experimental investigations of passive and semi-active friction dampers for stay cables. Different control strategies have been tested and the damper performances have been compared. The present experimental results with the semi-active device show that it is possible to outperform the passive damping by a factor of 1.8 on the obtained damping ratio with the same maximum damper force. This has been achieved by using two key concepts in the control strategy for the semi-active damper. The first concept is real-time adaption of the damper force to the corresponding vibration amplitude of the cable and the second concept is realization of apparent negative stiffness by real-time on-off control of the friction damper brakes. |
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| Keywords: |
stay cables semi-active damping negative stiffness control strategy friction damping
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