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New Soil-Water Characteristic Curve and Its Performance in the Finite-Element Simulation of Unsaturated Soils
Among the many constitutive equations, the moisture-suction relationship, also known as the soil-water characteristic curve (SWCC), is one of the important relationships needed for modeling the dynamics of unsaturated soils using the finite-element method. In this study, a new SWCC equation is developed that uses four fitting parameters including the maximum possible suction. The new model predicts the experimental data of various soils well for a wide range of degrees of saturation (DOS), especially in high suction (above ). Predicting the higher suction at low DOS is one of the deficiencies of the widely used Brooks and Corey, van Genuchten, and Fredlund and Xing models. The numerical stability and performance of the proposed, and other widely used models, are investigated by implementing these models within in a simplified finite-element program for the dynamics of unsaturated soil and simulating static and dynamic problems. For the midrange DOS, all of the aforementioned models predict similar responses. However, at low DOS the new model predicts the suction variations well compared with the other models.
New Soil-Water Characteristic Curve and Its Performance in the Finite-Element Simulation of Unsaturated Soils
Among the many constitutive equations, the moisture-suction relationship, also known as the soil-water characteristic curve (SWCC), is one of the important relationships needed for modeling the dynamics of unsaturated soils using the finite-element method. In this study, a new SWCC equation is developed that uses four fitting parameters including the maximum possible suction. The new model predicts the experimental data of various soils well for a wide range of degrees of saturation (DOS), especially in high suction (above ). Predicting the higher suction at low DOS is one of the deficiencies of the widely used Brooks and Corey, van Genuchten, and Fredlund and Xing models. The numerical stability and performance of the proposed, and other widely used models, are investigated by implementing these models within in a simplified finite-element program for the dynamics of unsaturated soil and simulating static and dynamic problems. For the midrange DOS, all of the aforementioned models predict similar responses. However, at low DOS the new model predicts the suction variations well compared with the other models.
New Soil-Water Characteristic Curve and Its Performance in the Finite-Element Simulation of Unsaturated Soils
Krishnapillai, Shada H. (Autor:in) / Ravichandran, Nadarajah (Autor:in)
International Journal of Geomechanics ; 12 ; 209-219
15.05.2012
112012-01-01 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Experimental Research on Soil-Water Characteristic Curve of Unsaturated Soils
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Experimental Research on Soil-Water Characteristic Curve of Unsaturated Soils
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