An effective stress-based DSC model for predicting hydromechanical shear behavior of unsaturated collapsible soils subjected to initial shear stress
Evaluation of hydromechanical shear behavior of unsaturated soils is still a challenging issue. The time and cost needed for conducting precise experimental investigation on shear behavior of unsaturated soils have encouraged several investigators to develop analytical, empirical, or semi-empirical...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775524002452 |
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| author | Saman Soleymani Borujerdi S. Mohsen Haeri Amir Akbari Garakani Chandrakant S. Desai |
| author_facet | Saman Soleymani Borujerdi S. Mohsen Haeri Amir Akbari Garakani Chandrakant S. Desai |
| author_sort | Saman Soleymani Borujerdi |
| collection | DOAJ |
| description | Evaluation of hydromechanical shear behavior of unsaturated soils is still a challenging issue. The time and cost needed for conducting precise experimental investigation on shear behavior of unsaturated soils have encouraged several investigators to develop analytical, empirical, or semi-empirical models for predicting the shear behavior of unsaturated soils. However, most of the previously proposed models are for specimens subjected to the isotropic state of stress, without considering the effect of initial shear stress. In this study, a hydromechanical constitutive model is proposed for unsaturated collapsible soils during shearing, with consideration of the effect of the initial shear stress. The model implements an effective stress-based disturbed state concept (DSC) to predict the stress-strain behavior of the soil. Accordingly, material/state variables were defined for both the start of the shearing stage and the critical state of the soil. A series of laboratory tests was performed using a fully automated unsaturated triaxial device to verify the proposed model. The experimental program included 23 suction-controlled unsaturated triaxial shear tests on reconstituted specimens of Gorgan clayey loess wetted to different levels of suctions under both isotropic and anisotropic stress states. The results show excellent agreement between the prediction by the proposed model and the experimental results. |
| format | Article |
| id | doaj-art-7a02821455434082a6656e2b9dcb4644 |
| institution | Kabale University |
| issn | 1674-7755 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj-art-7a02821455434082a6656e2b9dcb46442025-01-17T04:49:09ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552025-01-01171539555An effective stress-based DSC model for predicting hydromechanical shear behavior of unsaturated collapsible soils subjected to initial shear stressSaman Soleymani Borujerdi0S. Mohsen Haeri1Amir Akbari Garakani2Chandrakant S. Desai3Civil Engineering Department, Sharif University of Technology, Tehran, IranCivil Engineering Department, Sharif University of Technology, Tehran, Iran; Corresponding author.Power Industry Structures Research Department, Niroo Research Institute, Tehran, IranDepartment of Civil and Architectural Engineering and Mechanics, University of Arizona, Arizona, USAEvaluation of hydromechanical shear behavior of unsaturated soils is still a challenging issue. The time and cost needed for conducting precise experimental investigation on shear behavior of unsaturated soils have encouraged several investigators to develop analytical, empirical, or semi-empirical models for predicting the shear behavior of unsaturated soils. However, most of the previously proposed models are for specimens subjected to the isotropic state of stress, without considering the effect of initial shear stress. In this study, a hydromechanical constitutive model is proposed for unsaturated collapsible soils during shearing, with consideration of the effect of the initial shear stress. The model implements an effective stress-based disturbed state concept (DSC) to predict the stress-strain behavior of the soil. Accordingly, material/state variables were defined for both the start of the shearing stage and the critical state of the soil. A series of laboratory tests was performed using a fully automated unsaturated triaxial device to verify the proposed model. The experimental program included 23 suction-controlled unsaturated triaxial shear tests on reconstituted specimens of Gorgan clayey loess wetted to different levels of suctions under both isotropic and anisotropic stress states. The results show excellent agreement between the prediction by the proposed model and the experimental results.http://www.sciencedirect.com/science/article/pii/S1674775524002452Unsaturated collapsible soilInitial shear stressHydromechanical shear behaviorEffective stressDisturbed state conceptCritical state |
| spellingShingle | Saman Soleymani Borujerdi S. Mohsen Haeri Amir Akbari Garakani Chandrakant S. Desai An effective stress-based DSC model for predicting hydromechanical shear behavior of unsaturated collapsible soils subjected to initial shear stress Journal of Rock Mechanics and Geotechnical Engineering Unsaturated collapsible soil Initial shear stress Hydromechanical shear behavior Effective stress Disturbed state concept Critical state |
| title | An effective stress-based DSC model for predicting hydromechanical shear behavior of unsaturated collapsible soils subjected to initial shear stress |
| title_full | An effective stress-based DSC model for predicting hydromechanical shear behavior of unsaturated collapsible soils subjected to initial shear stress |
| title_fullStr | An effective stress-based DSC model for predicting hydromechanical shear behavior of unsaturated collapsible soils subjected to initial shear stress |
| title_full_unstemmed | An effective stress-based DSC model for predicting hydromechanical shear behavior of unsaturated collapsible soils subjected to initial shear stress |
| title_short | An effective stress-based DSC model for predicting hydromechanical shear behavior of unsaturated collapsible soils subjected to initial shear stress |
| title_sort | effective stress based dsc model for predicting hydromechanical shear behavior of unsaturated collapsible soils subjected to initial shear stress |
| topic | Unsaturated collapsible soil Initial shear stress Hydromechanical shear behavior Effective stress Disturbed state concept Critical state |
| url | http://www.sciencedirect.com/science/article/pii/S1674775524002452 |
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