MODEL VIBRATION TESTS CONCERNING THE DYNAMIC INTERACTION OF SOIL-STRUCTURE SYSTEM FOLLOWED BY SLIDING AND SEPARATION AND THEIR NUMERICAL SIMULATION

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  • すべり剥離を伴う基礎・地盤の動的相互作用に関する模型振動実験と数値シミュレーション
  • すべり剥離を伴う基盤・地盤の動的相互作用に関する模型振動実験と数値シミュレーション
  • スベリ ハクリ オ トモナウ キバン ジバン ノ ドウテキ ソウゴ サヨウ ニ

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It is indicated that the stiffness of bedrock under foundations evaluated analytically by FEM tends to be larger than that evaluated from in-situ vibration tests performed on the concrete block foundation. One reason may be considered to be owing to lowering of rigidity in this surface layer, another owing to imbalance of rigidity comming out between both parts of tension and compression sides in bedrock during rocking vibration, in extreme case, being followed by uplift. In this research some vibration tests are carried out with structural models on ground ones of silicon rubber, and the phenomena mentioned above and its characteristics are clarified. At the same time numerical simulations are carried out with the computer program developed here which can simulate nonlinear seismic response followed by sliding and separation. Accuracy of above numerical procedure is confirmed comparing the numerical results with experimental ones.

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