STUDY ON 3-D DYNAMIC ANALYSIS OF ARCH DAM AGAINST STRONG EARTHQUAKE MOTION COSIDERING DISCONTINUOUS BEHAVIOR OF JOINTS

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  • ARIGA Yoshiaki
    社団法人 土木学会 電源開発 (株) 技術開発センター
  • CAO Zengyan
    (株) 開発計算センター エンジニアリング事業部
  • WATANABE Hiroyuki
    社団法人 土木学会 埼玉大学 工学部建設工学科

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  • 強震時のジョイントの非連続的挙動を考慮したアーチダムの三次元動的解析に関する研究
  • キョウシンジ ノ ジョイント ノ ヒレンゾクテキ キョドウ オ コウリョ シタ アーチダム ノ 3ジゲン ドウテキ カイセキ ニ カンスル ケンキュウ

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Abstract

A method for assessing the seismic stability of arch dams has been developed in the study. With the method the earthquake, observed at an existing arch dam, of its maximum acceleration over 700gal has been simulated. Furthermore, the response analyses of the dam subjected to a strong earthquake of the maximum amplitude 500gal at the dam base have been carried out. The dynamic behaviors of the contraction joints and the effects on the earthquake responses of the dam have been analyzed. It has been pointed out that the nonlinear behaviors of the contraction joints exert significant effects on the responses of the dams struck by strong earthquakes. And reservoir water has a favoring effect on the earthquake resistibility of the dam. Finally, the earthquake resistibility of the arch dam against very strong earthquakes has been given.

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