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- W2788452298 abstract "Cable-stayed bridge has widely been applied for medium-to-very long span. Thanks to advanced construction technology and structural materials, its span length is being broken time by time. Due to the increase of main span, cable length becomes longer and more vulnerable to wind excitation. Common large amplitude vibration types of stay cables are rain-wind-induced vibration (RWIV) and dry-state galloping (DG). Therefore, countermeasure for DG and RWIV is one of the key design factors of cable-stayed bridges. Many studies on its mechanism and countermeasures have been conducted in which its causes and mechanism were explained to some extent. It is typically explained that an axial flow behind the cable and flow fields around the cable at the critical Reynolds number regime suppress Karman vortex shedding, and then low-frequency vortices related to latent Strouhal frequencies become stronger, which causes dry galloping at high reduced wind speeds (U/fD) [1, 2, 3], although the complete explanation for the mechanism has not been given. In this study, using a spiral protuberance cable, which was developed as an aerodynamic countermeasure stay cable [4], and a circular cable, wake flow behind the cable as well as wind-induced dynamic response were captured by wind tunnel test. Comparing power spectral densities and coherence along the cable axis of the wake flow between spiral cables and circular cables at different wind speeds, the role of low-frequency vortices/flow on dry galloping and the suppression mechanism of the spiral protuberance were clarified." @default.
- W2788452298 created "2018-03-06" @default.
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- W2788452298 date "2018-01-01" @default.
- W2788452298 modified "2023-09-27" @default.
- W2788452298 title "Effect of Low-Frequency Flow on Cable Dry-State Galloping" @default.
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- W2788452298 doi "https://doi.org/10.1007/978-981-10-7149-2_61" @default.
- W2788452298 hasPublicationYear "2018" @default.
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