Chapter
Apr 26, 2012
Calculation of Pseudo Strain and Dissipated Pseudo Strain Energy in Unsaturated Soil
Authors: Byoungjae Mun [email protected], Charles P. Aubeny [email protected], and Robert L. Lytton [email protected]Author Affiliations
Publication: Unsaturated Soils 2006
Abstract
This paper deals with the application of the theory behind the pseudo strain concept to unsaturated soil behavior and testing methods leading to the calculation of pseudo strain and dissipated pseudo strain energy. Drained monotonic triaxial and undrained cyclic triaxial tests at constant suction were conducted on silty sand to investigate the effect of viscous resistance during testing. The monotonic triaxial test results analyzed both with and without the use of the pseudo strain concept were compared to the critical state based elasto-plastic model. The pseudo-strain test results conform more closely to the Alonso et al model. The cyclic test results were used to calculate the dissipated pseudo strain energy associated with accumulating plastic pseudo-strain. Based on calculated dissipated pseudo strain energy, a dissipated pseudo-strain deviatoric power failure theory for unsaturated soils under earthquake loading is proposed. The proposed theory shows the conditions under which the soil will fail either by cyclic mobility (soil acts as a solid) or by liquefaction (soil acts as a liquid).
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© 2006 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Cyclic tests
- Energy dissipation
- Engineering fundamentals
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Laboratory tests
- Material mechanics
- Materials engineering
- Soil liquefaction
- Soil mechanics
- Soil properties
- Soil stress
- Soils (by type)
- Strain
- Tests (by type)
- Thermodynamics
- Triaxial tests
- Unsaturated soils
Authors
Affiliations
GeoEngineers Inc., 8410 154th Avenue NE, Redmond, WA 98052. E-mail: [email protected]
Texas A&M University, Department of Civil and Environmental Engineering, Mail Stop 3136, College Station, TX 77843. E-mail: [email protected]
Texas A&M University, Department of Civil and Environmental Engineering, Mail Stop 3136, College Station, TX 77843. E-mail: [email protected]
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