Seismic Stability Evaluation of Submarine Slope using Centrifuge Model Test and Its Simulation

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  • SAITO Kazutoshi
    Department of Civil Engineering, Graduate School of Engineering, Nihon University
  • SENTO Noriaki
    Department of Civil Engineering, College of Engineering, Nihon University
  • NAKAMURA Susumu
    Department of Civil Engineering, College of Engineering, Nihon University

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Other Title
  • 遠心載荷実験を用いた海底斜面の地震時安定性評価とその再現解析

Abstract

<p>In order to predict tsunami height by submarine landslide due to earthquake, it is important to verify the evaluation method for submarine slope stability during earthquake. Finite difference method adopted two constitutive models was used to simulate the centrifuge model test results. The effect of water depth and crack on the top of slope to the slope failure was studied. The applicability of the constitutive models was also evaluated. Consequently, seismic coefficient at onset of failure were almost same irrespective of water depth and failure modes of slope with and without crack were almost same in the simulation. Simulation result using Mohr-Coulomb model with strength parameter considering shear strength under over-consolidated and low confining pressure condition was consistent with test result on seismic coefficient at failure and position of failure surface.</p>

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