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| Damping of Stay Cable with a Friction Damper |
| WANG Hui-ping 1, SUN Li-min 2，HU Xiao-lun 1 |
1. Transportation College, Southeast University, Nanjing, 210096, China;
2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, 200092, China |
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Abstract Damping of stay cable with nonlinear friction damper was studied. The free vibration of the cable with a friction damper was numerically simulated by finite element method. The free vibration attenuation characteristics of cable, the variation of modal damping ratio of cable, and vibration shape of cable were studied. A universal curve was proposed that relates the modal damping ratio of a cable with a friction damper when the effect of various parameters on damping was considered. The value of a maximum available additional damping was analyzed. The results show that the maximum modal damping ratio of cable with a friction damper is not a fixed value, but a range, and the lowest value of which is larger than that of an optimal passive linear viscous damper. The results of numerical simulation were preferably verified by the experiments.
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Received: 19 August 2014
Published: 25 May 2016
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