Numerical simulation of an unsaturated slope failure during an earthquake

R. Uzuoka, K. Maruyama, T. Mori, M. Kazama, T. Unno, N. Sento

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A dynamic three-phase coupled analysis is validated through numerical simulations of seismic behavior of a damaged fill slope during an earthquake. The equations governing the dynamic deformation of unsaturated soil are derived here based on porous media theory and constitutive models. The skeleton stress-strain constitutive relation is a simplified elasto-plastic constitutive model based on the non-associated flow rule and nonlinear kinematic hardening rule. The soil water characteristic model is a hysteresis model to reproduce the wetting process during cyclic loading. An actual fill slope which was partially collapsed and flowed during the 2003 earthquake is examined. The physical and mechanical properties are investigated with in-situ and laboratory tests. The numerical results showed the reduction of skeleton stress in the unsaturated fill as well as liquefaction in the saturated fill during the earthquake.

Original languageEnglish
Title of host publicationUnsaturated Soils - Proceedings of the 5th International Conference on Unsaturated Soils
Pages1093-1099
Number of pages7
Publication statusPublished - 2011
Event5th International Conference on Unsaturated Soils - Barcelona, Spain
Duration: 2010 Sep 62010 Sep 8

Publication series

NameUnsaturated Soils - Proceedings of the 5th International Conference on Unsaturated Soils
Volume2

Other

Other5th International Conference on Unsaturated Soils
CountrySpain
CityBarcelona
Period10/9/610/9/8

ASJC Scopus subject areas

  • Soil Science

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