SHAKING TESTS AND DYNAMIC BEHAVIOR ANALYSES IN LONGITUDINAL DIRECTION OF SHIELD TUNNEL UNDER AXIAL SEISMIC FORCE

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  • 地震動が軸方向に作用する場合のシールドトンネルの模型振動実験とその応答解析
  • ジシンドウ ガ ジク ホウコウ ニ サヨウ スル バアイ ノ シールドトンネル ノ モケイ シンドウ ジッケン ト ソノ オウトウ カイセキ

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Abstract

In order to investigate the dynamic behavior in the longitudinal direction of shield tunnel under the axial seismic force, a series of model shaking tests was carried out and the response analyses of shield tunnel were performed with emphasis on the seismic deformation method of time history. The investigation concerns the vibration characteristics of tunnel, the interaction effects between tunnel and ground, the suitability of the analytical model of tunnel under the axial seismic force, the effects on results of the response analyses of tunnel for using different calculation methods of the response displacements of free ground. In the model tests, the irregular ground and different tunnel rigidities were focused, the ground and tunnel materials were chosen according to the law of similarity. An analytical model in the longitudinal direction of shield tunnel under axial seismic force was proposed and validity of the model was verified by the model shaking tests.

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