Abstract
In the present study, a strain-softening constitutive model for sensitive clays originating from weathered pumice is applied to simulate an earthquake-induced catastrophic landslide that occurred during the 2011 Great Tohoku and Kanto Earthquake in Japan. The upper part of the slope sliding about 200 m and 13 people were killed. The failure could be related to shear strength degradation of the sensitive clay layers in the slope during the earthquake.
The strain-softening characteristics of the sensitive material in the slope have been investigated in a series of laboratory tests involving undisturbed samples. The observed stress-displacement relationships under cyclic loading are numerically modelled using a proposed elasto-plastic constitutive model, based on the dynamic finite element method. The observed phenomena are appropriately simulated by the proposed model.
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Wakai A, Ugai K (2004) A simple constitutive model for the seismic analysis of slopes and its applications. Soils Found 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. Soil Found 50(4):515–527
Acknowledgments
The authors would like to thank Prof. Takehiko Suzuki, Tokyo Metropolitan University, for his great help in the identification of volcanic tephra in the study area.
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© 2014 Springer International Publishing Switzerland
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Wakai, A., Cai, F., Ugai, K., Soda, T. (2014).
Finite Element Simulation for an Earthquake-Induced Catastrophic Landslide Considering Strain-Softening Characteristics of Sensitive Clays.
In: Sassa, K., Canuti, P., Yin, Y. (eds) Landslide Science for a Safer Geoenvironment. Springer, Cham. https://doi.org/10.1007/978-3-319-05050-8_43
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DOI: https://doi.org/10.1007/978-3-319-05050-8_43
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Publisher Name: Springer, Cham
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Online ISBN: 978-3-319-05050-8
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