Research on Wind-induced Vibration of Long-span Cable-stayed Bridges
DOI:
https://doi.org/10.54097/hset.v28i.4097Keywords:
Long-span cable-stayed bridge; wind-induced vibration; aerodynamic behavior.Abstract
With the development of mechanical theories and bridge construction technologies, there are increasing number of long-span cable-stayed (LSCS) bridges crossing bays or oceans, which can shorten the distance between two places and facilitate the travel of people. However, with the increase of bridge length, the damping ratio decreases at the same time, making the bridge structure more sensitive to wind-induced vibration (WIV). The vibration can cause safety problems and even the deformation of the bridge. Therefore, it is of great significance to research on the WIV of LSCS bridges. In this paper, common types of WIV of LSCS bridges are firstly introduced from their common definitions and present studies. Then, the mechanical performances under typhoon events and daily average wind conditions are analyzed, respectively. Finally, the solution methods of eliminating WIV of these bridges are discussed, involving strengthening structural stiffness, increasing damping ratio as well as changing the section form of the bridge.
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