Parametric oscillation of cables and aerodynamic effect

Yong XIA1,Jing ZHANG1,Youlin XU1,Yozo FUJINO2,

PDF(232 KB)
PDF(232 KB)
Front. Struct. Civ. Eng. ›› 2010, Vol. 4 ›› Issue (3) : 321-325. DOI: 10.1007/s11709-010-0028-z
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Parametric oscillation of cables and aerodynamic effect

  • Yong XIA1,Jing ZHANG1,Youlin XU1,Yozo FUJINO2,
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Abstract

This paper addresses the aerodynamic effect on the nonlinear oscillation, particularly parametric vibration of cables in cable-stayed bridges. A simplified 2-DOF model, including a beam and a stayed cable, is formulated first. Response of the cable under global harmonic excitation which is associated with wind speed is obtained using the multiple scales method. Via numerical analysis, the stability condition of the cable in terms of wind speed is derived. The method is applied to a numerical example and a long-span bridge to analyze its all stay cables. It is demonstrated that very large vibration at one of the longest cables in the middle span of the bridge can be parametrically excited when the wind speed is over around 210 km/h (58.5 m/s).

Keywords

parametric vibration / cables / cable-stayed bridge / nonlinear vibration

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Yong XIA, Jing ZHANG, Youlin XU, Yozo FUJINO,. Parametric oscillation of cables and aerodynamic effect. Front. Struct. Civ. Eng., 2010, 4(3): 321‒325 https://doi.org/10.1007/s11709-010-0028-z
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