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A platform for research: civil engineering, architecture and urbanism
Stress State Variables for Unsaturated Soils—Consensus and Controversy
Abstract Stress state variables describe the state of equilibrium of a system. When one or more stress state variables are changed, the system will change in response to establish the new equilibrium state. Hence, stress state variables are the building blocks of a constitutive relation. In the development of unsaturated soil mechanics, major advances were made possible through the correct identification of the stress state variables. In this paper, the current understanding of stress state variables for unsaturated soils is reviewed. Attempts have been made to use a single stress state variable in term of an equivalent effective stress for unsaturated soils. The major consensus is for the use of two stress state variables in terms of net normal stress and matric suction when developing constitutive relationships for unsaturated soils. It has been suggested lately that more than two stress state variables are needed to fully describe the full range of constitutive behaviour of unsaturated soils and that matric suction be replaced with a suction stress. These are interesting developments that should be explored in future study and research.
Stress State Variables for Unsaturated Soils—Consensus and Controversy
Abstract Stress state variables describe the state of equilibrium of a system. When one or more stress state variables are changed, the system will change in response to establish the new equilibrium state. Hence, stress state variables are the building blocks of a constitutive relation. In the development of unsaturated soil mechanics, major advances were made possible through the correct identification of the stress state variables. In this paper, the current understanding of stress state variables for unsaturated soils is reviewed. Attempts have been made to use a single stress state variable in term of an equivalent effective stress for unsaturated soils. The major consensus is for the use of two stress state variables in terms of net normal stress and matric suction when developing constitutive relationships for unsaturated soils. It has been suggested lately that more than two stress state variables are needed to fully describe the full range of constitutive behaviour of unsaturated soils and that matric suction be replaced with a suction stress. These are interesting developments that should be explored in future study and research.
Stress State Variables for Unsaturated Soils—Consensus and Controversy
Leong, E. C. (author)
2018-06-28
11 pages
Article/Chapter (Book)
Electronic Resource
English
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