Wind and Structures
Volume 7, Number 4, 2004, pages 281-291
DOI: 10.12989/was.2004.7.4.281
On the flutter characteristics of separated two box girders
Masaru Matsumoto, Rikuma Shijo, Akitoshi Eguchi, Tetsuya Hikida, Hitoshi Tamaki and Keisuke Mizuno
Abstract
The flutter characteristics of long span bridges are discussed from the point of the unsteady pressure distribution on bridge deck surface during heaving/torsional vibration related to the aerodynamic derivatives. In particular, it is explained that the coupling terms, which consist of A1* and H3*, play a substantial role on the coupled flutter, in comparison with the flutter characteristics of various structural sections. Also the effect of the torsional/heaving frequency ratio of bridge structures on the flutter instability is discussed from the point of the coupling effect between heaving and torsional vibrations.
Key Words
flutter stabilization; a super-long span bridge; A1* or/and H3* control; unsteady pressure characteristics; two-separate box girders with a vertical plate.
Address
Department of Civil and Earth Resources Engineering, Kyoto University, Yoshida Hon-machi, Sakyo-ku, Kyoto, Japan