加速度計測を利用したRC柱の地震時剛性低減評価手法の開発

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  • 楢崎 泰隆
    The University of Illinois at Urbana -Champaign, The Department of Civil and Environmental Engineering
  • 長山 智則
    東京大学 工学系研究科社会基盤学専攻
  • 蘇 迪
    東京大学 工学系研究科社会基盤学専攻

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タイトル別名
  • Development of a stiffness reduction evaluation method for RC columns during earthquakes based on acceleration measurements
  • 加速度計測を利用したRC柱の地震時剛性低減評価手法開発
  • カソクド ケイソク オ リヨウ シタ RC チュウ ノ ジシンジ ゴウセイ テイゲン ヒョウカ シュホウ カイハツ

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抄録

This research evaluates local structural conditions of RC columns of viaducts during earthquakes using acceleration measurement data. During strong earthquakes, the stiffness of RC columns reduces more severely during loading time steps than unloading time steps. The stiffness reduction from the unloading time steps to the loading time steps is evaluated as a damage indicator of the columns. A structural parameter identification method is first improved to identify loading and unloading stiffness separately. Then, the method of extracting loading and the unloading time steps are described. The proposed method is applied to a nonlinear SDOF model and a nonlinear viaduct model. Finally, the method is applied to the data sets of a large-scale RC column experiment conducted at E-Defense.

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