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Evaluation of Wake Galloping for Inclined Parallel Cables by Two-Dimensional Wind Testes Tests  

Kim, Sun-Joong (서울대학교 건설환경공학부)
Kim, Ho-Kyung (서울대학교 건설환경공학부)
Lee, Sang-Hoon (GS건설 기술연구소)
Publication Information
Journal of Korean Society of Steel Construction / v.23, no.6, 2011 , pp. 763-775 More about this Journal
Abstract
The wake galloping phenomenon is evaluated for two cylinders via two-dimensional wind tunnel tests. The two cylinders are deployed parallel to the inclination of the vertical plane, which simulates the inclined stay cables of a cable-stayed bridge. The upstream and downstream displacements of the cylinder are observed with varying center distances between the two cylinders. The effect of structural damping on the mitigation of wake galloping is also investigated. The amplitude of the vibration is very sensitive to center distance between the two cylinders. The maximum amplitudes exceededthe allowable limit of the design guidelines for small center distances of less than or equal to six times the diameter of the cylinder. The overall results conformedto the conventional design practice for the wake galloping of parallel cables. It was found, however, that the increase in the damping was not effective in reducing the amplitude of the vibration in the wake galloping phenomenon.
Keywords
parallel cables; stay cable; wake galloping; center distance; damping;
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