Bridge aerodynamics.

• MATSUMOTO Masaru

  Department of Civil Engineering, Kyoto University

Bibliographic Information

Other Title

• 橋梁の空力振動

Abstract

This paper describes the aerodynamic properties and their generation mechanism of various wind-induced vibration of bridge structures, based on the recent investigations. For vortex-induced vibration, two different kinds of vortices, which are related to the instability of one/two shear layer (s) respectively, play major role. Furthermore, the intermittent Karman vortex shedding can excite the inclined circular cylinder at much higher reduced velocity than the reciprocal of Strouhal number, so called “high speed vortex-induced vibration”. Galloping instability is caused by the unsteady flow for bluff section and the quasi-steady flow for slender section, corresponding to “low speed galloping” and “high speed galloping”, respectively. On the other hand, it is shown that the torsional flutter instability is fundamentally identical to the coupled flutter instability from the point of flow pattern / unsteady pressure distribution characteristics around the body based on non-dimensional chordwise coordinate which is normalized by the body height. Finally the aerodynamic stabilization of these wind-induced vibration is briefly discussed.

Journal

• Journal of Japan Society of Fluid Mechanics

  Journal of Japan Society of Fluid Mechanics 14 (3), 209-225, 1995

  The Japan Society of Fluid Mechanics

Keywords

• Bluff body aerodynamics
• Generation mechanism
• Vortex-induced vibration
• Galloping instability
• Torsional/coupled flutter instability
• Aerodynamic stabilization

Details

• CRID: 1390001204694894336
• NII Article ID: 10002253392
• NII Book ID: AN00175191
• DOI: 10.11426/nagare1982.14.209
• ISSN: 21854912
• ISSN: 02863154
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed