Modeling of cable vibration effects of cable-stayed bridges |
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| Authors: | S H Cheng David T Lau |
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| Institution: | Department of Civil and Environmental Engineering, Carleton University, Ottawa, Ontario, Canada |
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| Abstract: | The analysis of dynamic responses of cable-stayed bridges subjected to wind and earthquake loads generally considers only
the motions of the bridge deck and pylons. The influence of the stay cable vibration on the responses of the bridge is either
ignored or considered by approximate procedures. The transverse vibration of the stay cables, which can be significant in
some cases, are usually neglected in previous research. In the present study, a new three-node cable element has been developed
to model the transverse motions of the cables. The interactions between the cable behavior and the other parts of the bridge
superstructure are considered by the concept of dynamic stiffness. The nonlinear effect of the cable caused by its self-weight
is included in the formulation. Numerical examples are presented to demonstrate the accuracy and efficiency of the proposed
model. The impact of cable vibration behavior on the dynamic characteristics of cable-stayed bridges is discussed.
Supported by: Natural Science and Engineering Research Council of Canada |
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| Keywords: | cable-stayed bridges cable vibration dynamics finite elements long-span structures |
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