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.
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References
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)
Wakai A, Ugai K (2004) A simple constitutive for the seismic analysis of slopes and its applications, soils and foundations 44(4):83–97
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):533–545
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.
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Fukushima, T., Matsushita, K., Usami, H., Wakai, A. (2013). Finite Element Simulation for An Earthquake-Induced Landslide Considering Strain-Softening Characteristics of Sensitive Clayey Loam. In: Ugai, K., Yagi, H., Wakai, A. (eds) Earthquake-Induced Landslides. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32238-9_73
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DOI: https://doi.org/10.1007/978-3-642-32238-9_73
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