@inproceedings{oai:jaxa.repo.nii.ac.jp:00003465,
 author = {須田, 健太郎 and 松田, 一俊 and 加藤, 九州男 and 玉井, 佑典 and Suda, Kentaro and Matsuda, Kazutoshi and Kato, Kusuo and Tamai, Yusuke},
 book = {宇宙航空研究開発機構特別資料, JAXA Special Publication: Proceedings of the First International Symposium on Flutter and its Application},
 month = {Mar},
 note = {First International Symposium on Flutter and its Application (May 15-17, 2016. Mielparque-tokyo), Minato-ku, Tokyo, Japan, In 2009, Ikitsuki Bridge, a truss bridge in Nagasaki Prefecture with a center span length of 400 m, was discovered to have a crack in the bracing member of the bridge. As a result of the subsequent vibration measurement at the site, the main cause of the crack was identified as Karman vortex-induced excitation. However, vibrations were also observed in the wind speed range of 7-8 m/s, which was lower than the resonance wind speed of Karman vortex-induced excitation. Conventionally, according to the results from a wind tunnel test using a side ratio of B/D=2-8 (B: along-wind length, D: cross-wind length), the motion-induced vortex excitation was confirmed. However, the side ratio of the section of the bracing member is B/D=1.18, and the motion-induced vortex excitation in the case of this side ratio has not yet to be confirmed by the conventional wind tunnel test. Therefore, in this research, a spring-supported test was carried out targeting a rectangular cross section of B/D=1.18. Furthermore, flow visualization was performed and the results of the spring-supported test were discussed. The vibrations in the bracing member with a rectangular cross section (B/D=1.18) of Ikitsuki Bridge generated in the wind speed range of lower than Karman vortex-induced excitation among the aerodynamic vibrations caused by wind were suggested to possibly be motion-induced vortex excitation by experimental results of a spring-supported test and the flow visualization. Further investigation should be undertaken., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1630046072, レポート番号: JAXA-SP-16-008E},
 pages = {669--678},
 publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)},
 title = {Study on aerodynamic vibrations of a bracing member with a rectangular cross section of a long-spanned truss bridge},
 volume = {JAXA-SP-16-008E},
 year = {2017}
}