Structural Engineering and Mechanics

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Using cable finite elements to analyze parametric vibrations of stay cables in cable-stayed bridges

  • Wu, Qingxiong (College of Civil Engineering and Architecture, Fuzhou University) ;
  • Takahashi, Kazuo (Department of Civil Engineering, Faculty of Engineering, Nagasaki University) ;
  • Chen, Baochun (College of Civil Engineering and Architecture, Fuzhou University)
  • Received : 2004.08.31
  • Accepted : 2006.04.17
  • Published : 2006.08.20
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Abstract

This paper uses the finite element method to simultaneously consider the coupled cable-deck vibrations and the parametric vibrations of stay cables in dynamic analysis of a cable-stayed bridge. The stay cables are represented by some cable finite elements, which can consider the parametric vibration of the cables. In addition to modeling stay cables using multiple link cable elements, a procedure for removing the self-weight term of cable element is proposed. A eigenvalue analysis process using dynamic condensation method for sorting out the natural modes of the girder-tower vibrations and the Rayleigh damping considering element damping for damping matrix are also proposed for dynamic analyses of cable-stayed bridges. The possibilities of using cable elements and of using global and local vibrations to evaluate the parametric vibrations of stay cables in a cable-stayed bridge are confirmed, respectively.

Keywords

References

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