Vortex-induced vibration tests of circular cylinders connected with typical joints in transmission towers

Vortex-induced vibration (VIV) tests on full-scale cylinders are undertaken to study the vibration performance of steel tubes connected with typical joints in transmission towers, including [-shaped gusset plate connection, U-shaped gusset plate connection, cross-gusset connection and the flange. Du...

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Bibliographic Details
Published in:Journal of wind engineering and industrial aerodynamics 2011-10, Vol.99 (10), p.1069-1078
Main Authors: Deng, H.Z., Jiang, Q., Li, F., Wu, Y.
Format: Article
Language:English
Subjects:
Amplitudes
Angle of attack
Applied sciences
Buildings
Buildings. Public works
Climatology and bioclimatics for buildings
Cylinders
Exact sciences and technology
Gusset plate connection
Gusset plates
Joints
Miscellaneous
Transmission tower
Transmission towers
Types of buildings
Vibration
Vortex-induced vibration
Vortex-induced vibrations
Wind tunnel test
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Summary:Vortex-induced vibration (VIV) tests on full-scale cylinders are undertaken to study the vibration performance of steel tubes connected with typical joints in transmission towers, including [-shaped gusset plate connection, U-shaped gusset plate connection, cross-gusset connection and the flange. Due to the asymmetric flexural stiffness for the cross section of the [-shaped or U-shaped gusset plate, VIV is only generated about the minor axis. The paper presents the relationship between the slenderness ratio and the occurrence wind speed of VIV about the minor axis. Moreover, it has been shown that VIV can occur not only in laminar flows, but also in turbulent flows, and the amplitude decreases as the turbulence intensity rises. The amplitude is affected by the wind attack angle, and drops as the wind attack angle decreases. It is revealed that for the cylinders connected with [-shaped gusset plates with the slenderness ratio of 100∼200, the value of Strouhal number ranges from 0.20 to 0.21and the reduced velocity from 5.0 to 5.5. ► Full scaled wind tunnel test is conducted to study VIV response of cylinders with typical joints. ► VIV occurs for cross-gusset joint, flange, and about the minor axis of [-shaped/U-shaped gusset plates. ► Amplitude is inversely proportional to the natural frequency and affected by the damping ratio. ► Amplitude of VIV decreases as turbulence intensity increases. ► Maximum amplitude of VIV drops as the decrease of wind attack angle.
ISSN:0167-6105
1872-8197
DOI:10.1016/j.jweia.2011.07.005