Simulation of liquefaction of unsaturated sand using porous media theory

R. Uzuoka, Motoki Kazama, N. Sento, T. Unno

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

1 Citation (Scopus)

Abstract

Numerical simulations of unsaturated soil triaxial tests were performed using the porous media theory and a simplified elasto-plastic constitutive model for sand. In the tests, cyclic shear strain was applied to fine clean sand with the same dry density but with different initial suction under undrained conditions. The zero skeleton stress state (i.e. liquefaction) for unsaturated sand was achieved when both the pore air pressure and the water pressure built up to the initial total pressure. Therefore, it is necessary to consider pore air pressure for the proper simulation of liquefaction of unsaturated sand. In the simulation, three phases with a soil skeleton, pore water, and pore air were considered on the basis of porous media theory. The simplified elasto-plastic constitutive model for the soil skeleton was based on the non-associated flow rule and the nonlinear kinematic hardening rule. The simulations provided a satisfactory reproduction of the triaxial test results in the cases where the initial degree of saturation was higher than about 70%.

Original languageEnglish
Title of host publicationProceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering
Subtitle of host publicationThe Academia and Practice of Geotechnical Engineering
Pages618-621
Number of pages4
DOIs
Publication statusPublished - 2009 Dec 1
Event17th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2009 - Alexandria, Egypt
Duration: 2009 Oct 52009 Oct 9

Publication series

NameProceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering
Volume1

Other

Other17th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2009
CountryEgypt
CityAlexandria
Period09/10/509/10/9

Keywords

  • Constitutive model
  • Cyclic triaxial test
  • Liquefaction
  • Porous media theory
  • Unsaturated sand

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Uzuoka, R., Kazama, M., Sento, N., & Unno, T. (2009). Simulation of liquefaction of unsaturated sand using porous media theory. In Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering (pp. 618-621). (Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering; Vol. 1). https://doi.org/10.3233/978-1-60750-031-5-618