ENERGY-BASED DAMPING EVALUATION OF CABLE-STAYED BRIDGES AND ITS APPLICATION TO TSURUMII TSUBASA BRIDGE

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  • Yamaguchi Hiroki
    社団法人 土木学会 埼玉大学 工学部建設工学科
  • Takano Haruo
    社団法人 土木学会 首都高速道路公団 神奈川建設局設計課
  • Ogasawara Masafumi
    社団法人 土木学会 首都高速道路公団 工務部設計技術課
  • Shimosato Tetsuhiro
    社団法人 土木学会 首都高速道路公団 計画部第1計画課
  • Kato Masashi
    社団法人 土木学会 NKK 基盤技術研究所 都市工学研究部
  • Kato Hisato
    社団法人 土木学会 NKK 橋梁建設部 長大橋室

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  • 斜張橋振動減衰のエネルギー的評価法と鶴見つばさ橋への適用
  • シャチョウキョウ シンドウ ゲンスイ ノ エネルギーテキ ヒョウカホウ ト ツ

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Abstract

An energy-based evaluation method of vibration damping in cable-stayed bridges is proposed and discussed in this paper. The damping values of five modes of the Tsurumi Tsubasa Bridge, which were obtained by the field vibration test, are analyzed by using the energy method. It was found that the contribution of dissipation energy from shoe friction, aerodynamic damping, and oil dampers and high damping rubbers for suppressing cable vibrations, can be large in the Tsurumi Tsubasa Bridge. In addition, damping characteristics of this bridge, such as high damping value and mode dependency of damping were reasonably explained by the results of energy analysis.

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