IMECH-IR  > 水动力学与海洋工程重点实验室(2009-2011)
Work and energy equations and the principle of generalized effective stress for unsaturated soils
Zhao CG(赵成刚); Liu Y; Gao FP(高福平)
Source PublicationInternational Journal for Numerical and Analytical Methods in Geomechanics
2009
Volume34Issue:9Pages:920-936
ISSN0363-9061
AbstractThe effective stress principle has been efficiently applied to saturated soils in the soil mechanics and geotechnical engineering practice; however, its applicability to unsaturated soils is still under debate. The appropriate selection of stress state variables is essential for the construction of constitutive models for unsaturated soils. Owing to the complexity of unsaturated soils, it is difficult to determine the deformation and strength behaviors of unsaturated soils uniquely with the previous single-effective-stress variable theory and two-effective-stress-variable theory in all the situations. In this paper, based on the porous media theory, the specific expression of work is proposed, and the effective stress of unsaturated soils conjugated with the displacement of the soil skeleton is further derived. In the derived work and energy balance equations, the energy dissipation in unsaturated soils is taken into account. According to the derived work and energy balance equations, all of the three generalized stresses and the conjugated strains have effects on the deformation of unsaturated soils. For considering these effects, a principle of generalized effective stress to describe the behaviors of unsaturated soils is proposed. The proposed principle of generalized effective stress may reduce to the previous effective stress theory of single-stress variable or the two-stress variables under certain conditions. This principle provides a helpful reference for the development of constitutive models for unsaturated soils.
KeywordUnsaturated Soils The Principle Of Effective Stress Work Of Deformation Energy Balance Equation
DOI10.1002/nag.839
Indexed BySCI
Language英语
WOS IDWOS:000279368500003
WOS KeywordMULTIPHASE POROUS-MEDIA ; CONSTITUTIVE FRAMEWORK ; GRANULAR MATERIAL ; MODELS ; THERMODYNAMICS ; INPUT ; FLOW
WOS Research AreaEngineering ; Materials Science ; Mechanics
WOS SubjectEngineering, Geological ; Materials Science, Multidisciplinary ; Mechanics
Citation statistics
Cited Times:43[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/33002
Collection水动力学与海洋工程重点实验室(2009-2011)
Corresponding AuthorZhao CG(赵成刚)
Recommended Citation
GB/T 7714
Zhao CG,Liu Y,Gao FP. Work and energy equations and the principle of generalized effective stress for unsaturated soils[J]. International Journal for Numerical and Analytical Methods in Geomechanics,2009,34,9,:920-936.
APA Zhao CG,Liu Y,&Gao FP.(2009).Work and energy equations and the principle of generalized effective stress for unsaturated soils.International Journal for Numerical and Analytical Methods in Geomechanics,34(9),920-936.
MLA Zhao CG,et al."Work and energy equations and the principle of generalized effective stress for unsaturated soils".International Journal for Numerical and Analytical Methods in Geomechanics 34.9(2009):920-936.
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