Dynamic Analysis of Fill Dam Using Velocity-Based Space-Time Finite Element Method with Elasto-Plastic Constitutive Model

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  • 速度型Space-Time有限要素法によるフィルダムの弾塑性地震応答解析
  • ソクドガタ Space-Time ユウゲン ヨウソホウ ニ ヨル フィルダム ノ ダン ソセイ ジシン オウトウ カイセキ

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Abstract

<p>The conventional method of seismic performance verification analyzes the seismic response and the permanent deformation individually and does not allow for assessing the seismic response across the entire range of possible soil deformations. This paper develops velocity-based single-field Space-Time Finite Element Method (v-ST/FEM) for the seismic response analysis of fill dams which undergo the permanent deformation during strong-motion earthquakes. The results of a nonlinear spring analysis obtained by the time integration method of v-ST/FEM are compared with those by Newmark-β and those results highlight the effectiveness of v-ST/FEM in reducing numerical error and increasing stability. An elasto-plastic constitutive model based on Mohr-Coulomb criterion is implemented in v-ST/FEM to compute the dynamic ground motion and the permanent deformation of fill dams and 1D and 2D analysis examples are studied in the infinitesimal deformation range.</p>

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