Abstract
The aim of this paper is to present cyclic constitutive models for sandy and clayey soils based on the kinematical hardening rule with the strain-degradation, and the applicability of the models to the practically important problem such as the of the levee during earthquakes. For sandy soils, we have been developed a cyclic elasto-plastic model based on the kinematical hardening rule with two yield surfaces for the change of the stress ratio and the mean effective stress considering the degradation of the yield surface. From the simulation by the present model, we have found the strong non-associativity leads to the large decrease in the mean effective stress during the cyclic deformations under undrained conditions while the model with associated flow rule is not. This result is quite important because the mean effective stress becomes almost zero at the full liquefaction state. We have found that the model can well reproduce the cyclic behavior of soil.
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References
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Oka, F., Kimoto, S. (2017). Cyclic Elastoplastic Constitutive Model for Soils Based on Non-linear Kinematical Hardening Rule with Volumetric and Deviatoric Kinematical Parameters. In: Papamichos, E., Papanastasiou, P., Pasternak, E., Dyskin, A. (eds) Bifurcation and Degradation of Geomaterials with Engineering Applications. IWBDG 2017. Springer Series in Geomechanics and Geoengineering. Springer, Cham. https://doi.org/10.1007/978-3-319-56397-8_10
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DOI: https://doi.org/10.1007/978-3-319-56397-8_10
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