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Finite Element Simulation for An Earthquake-Induced Landslide Considering Strain-Softening Characteristics of Sensitive Clayey Loam

  • Tomoyuki Fukushima
  • Keisuke Matsushita
  • Hirotatsu Usami
  • Akihiko Wakai
Conference paper

Abstract

Landslide with fluid-like mass movement is one of the typical features within the observed slope damages due to The East Japan Great Earthquake. In many slopes mainly composed of sensitive clayey loam with higher water content in northern Kanto district, the sudden strength degradation of the soil under the strong earthquake motion caused a long-distance travelling failure. In this study, a case of such catastrophic phenomena, at Okanouchi in Shirakawa-city, is simulated by the dynamic elasto-plastic finite element method where the cyclic loading characteristics of the sensitive clayey loam are numerically formulated by the UW softening model. By adopting the appropriate parameters based on the laboratory element tests with the undisturbed specimens, the obtained analytical results agreed with the observed phenomena.

Keywords

Slip Surface Excess Pore Water Pressure Undrained Shear Strength Cyclic Softening Earthquake Motion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We really thank Dr. Aly Ahmed (Visiting Scholar from Egypt, Gunma University) who has reviewed this paper as a native English speaker, correcting grammatical mistakes and providing us better ways of expression in English writing.

References

  1. Tanaka S, Usami H, Matsushita K, Wakai A (2012) Extension of the liquefaction strength concept under cyclic loading to the modeling of volcanic clayey soils (in print)Google Scholar
  2. Wakai A, Ugai K (2004) A simple constitutive for the seismic analysis of slopes and its applications, soils and foundations 44(4):83–97Google Scholar
  3. Wakai A, Ugai K, Onoue A, Kuroda S, Higuchi K (2010) Numerical modeling of an earthquake-induced landslide considering the strain-softening characteristics at the bedding plane, soils and foundations 50(4):533–545Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Tomoyuki Fukushima
    • 1
  • Keisuke Matsushita
    • 1
  • Hirotatsu Usami
    • 1
  • Akihiko Wakai
    • 1
  1. 1.Gunma UniversityMaebashi City, GunmaJapan

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