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Published in:
2014 | OriginalPaper | Chapter
Finite Element Simulation for an Earthquake-Induced Catastrophic Landslide Considering Strain-Softening Characteristics of Sensitive Clays
Authors : Akihiko Wakai, Fei Cai, Keizo Ugai, Tsutomu Soda
Published in: Landslide Science for a Safer Geoenvironment
Publisher: Springer International Publishing
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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.