COUPLING OF CABLE VIBRATION AND ITS DAMPING EFFECT IN LONG-SPAN CABLE-STAYED BRIDGE

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  • 多々羅大橋にみる長大斜張橋のケーブル振動連成とその減衰性能への影響
  • タタラオオハシ ニ ミル チョウダイ シャチョウキョウ ノ ケーブル シンドウレンセイ ト ソノ ゲンスイ セイノウ エ ノ エイキョウ
  • THE TATARA BRIDGE

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The present paper discusses characteristics of coupled cable vibration and its effects on damping of the Tatara Bridge, the world-longest cable-stayed bridge at the moment, by the theoretical modal analysis based on the substructural synthesis and also by the experimental modal analysis based on the Eigensystem Realization Algorithm.<br>It is found through this study that many numbers of cables' local modes can be coupled with the principle globalmodes of long-span cable-stayed bridges, which can reduce the damping ratios of the global modes of bridge due to low damping characteristics of the stay cables.

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