隅切りタンデム角柱のアクティブ乱流中におけるねじれ渦励振応答特性

川谷 充郎; 高橋 知久; 岩本 誠; 堀 高太郎; 西村 宣男

doi:10.14887/kazekosymp.Symp17.0.41.0

PROCEEDINGS OF 17th NATIONAL SYMPOSIUM ON WIND ENGINEERING

DOI https://doi.org/10.14887/kazekosymp.Symp17.0.41.0

Conference information

Host: Science Council of Japan

Co-host: Architectural Institute of Japan, Japan Association for Wind Engineering, The Institute of Electrical Engineering of Japan, Japan Society of Steel Construction, Japan Society of Civil Engineering, Meteorological Society of Japan

TORSIONAL VORTEX-INDUCED VIBRATION OF TANDEM RECTANGULAR PRISMS WITH CORNER-CUT IN TURBULENT FLOW

Mitsuo Kawatani, Tomohisa Takahashi, Makoto Iwamoto, Kotaro Hori, Nobuo Nishimura

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Keywords: Torsional vortex-induced vibration, Shapes of corner-cut, Turbulent characteristics, Strouhal number, Flow visualization

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 41

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Abstract

Since an aerodynamic behavior of main towers in tandem arrangement of long-span bridges is very complicated, it has not been completely examined. In this study, torsional vortex-induced vibrations of tandem rectangular prisms with corner-cut are examined by means of wind tunnel experiment. As parametric study, the effects of spacing ratio of tandem arrangement, shapes of corner-cut and turbulent characteristics such as turbulent intensity and scale on torsional responses of the models are investigated. In addition, vortex-onset frequency in the wake of the models is measured, and flow around the tandem prisms is visualized to consider the occurrence cause of torsional response.

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