20 A.R. Klembczyk The dampers were originally designed and built for this nearly constant cycling over a period of more than 50 years, projected to total approximately 2 109 (2 billion) cycles. Due to the fact that the results of the intermediate and principal inspections and testing show no signs of degradation, it is anticipated that the dampers will be able to meet this expected life time as anticipated. Acknowledgements The author would like to thank Craig Winters, Robert Schneider and Sean Frye for their contributions to this paper. Reference 1. Taylor, D.: Damper retrofit of the London Millennium Footbridge—a case study in biodynamic design. In: Proceedings of the 73rd Shock and Vibration Symposium, 2002
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