Experimental Assessment of Undrained Soil Behavior along Generalized Strain Paths
Publication: Geo-Congress 2024
ABSTRACT
The direction-dependent behavior of soil was investigated by controlling the inclination of major principal strain axis (αε) and intermediate principal strain parameter (bε). The data acquisition and control (DAC) program used in the Carleton University hollow cylinder torsional shear (HCT) apparatus was modified to enable testing along prescribed three-dimensional strain paths. This paper predominantly focuses on the testing procedures and intricacies involved in conducting the complex generalized strain path tests. Preliminary test data obtained from isotropically consolidated Fraser River sand specimens, sheared along strain paths with different inclinations of major principal strain axis is presented. The hardening tendency of the sand systematically decreases when the direction of major principal strain changes from the direction of deposition to direction of bedding, ceteris paribus. The friction angle at phase transformation is found to be essentially unique and independent of initial stress states and strain paths.
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Published In
Geo-Congress 2024
Pages: 81 - 89
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Consolidated soils
- Engineering fundamentals
- Geomechanics
- Geotechnical engineering
- Hydrologic engineering
- Hydrology
- Laboratory tests
- Material mechanics
- Materials engineering
- Sand (hydraulic)
- Shear tests
- Soil analysis
- Soil mechanics
- Soil properties
- Soil stress
- Soils (by type)
- Strain
- Stress (by type)
- Stress strain relations
- Structural analysis
- Structural engineering
- Tests (by type)
- Water and water resources
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