Abstract
This paper presents a nonlinear dynamic model for simulation and analysis of a kind of parametrically excited vibration of stay cable caused by support motion in cable-stayed bridges. The sag, inclination angle of the stay cable are considered in the model, based on which, the oscillation mechanism and dynamic response characteristics of this kind of vibration are analyzed through numerical, calculation. It is noted that parametrically excited oscillation of a stay cable with certain, sag, inclination angle and initial static tension force may occur in cable-stayed bridges due to deck vibration under the condition that the natural frequency of a cable approaches to about half of the, first model frequency of the bridge deck system. A new vibration control system installed on the cable anchorage is proposed as a possible damping system to suppress, the cable parametric oscillation. The numerical calculation results showed that with the use of this damping system, the cable oscillation due to the vibration of the deck and/or towers will be considerably reduced.
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Project supported by National Natural Science Foundation of China (No. 59978044)
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Bing-nan, S., Zhi-gang, W., Ko, J.M. et al. Parametrically excited oscillation of stay cable and its control in cable-stayed bridges. J. Zheijang Univ.-Sci. 4, 13–20 (2003). https://doi.org/10.1631/BF02841073
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DOI: https://doi.org/10.1631/BF02841073