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Shear behavior of calcareous sands in three-dimensional stress
Geotechnical problem analyses often involve three-dimensional stress conditions. In this paper, a series of drained true triaxial tests were conducted under stress-controlled conditions to investigate the effect of the intermediate principal stress on the mechanical behavior of calcareous sands. All stress paths, characterized by different intermediate principal stress coefficients (b-values) and terminal stress ratios (η), were maintained on the same deviatoric plane. The experimental results indicate that the deformation behavior of calcareous sands in three-dimensional stress is highly influenced by the b-values, particularly in the intermediate and minor principal directions, leading to notable anisotropy. The deviatoric stress–strain curves show that the deviatoric strain effectively represents the three-dimensional strain behavior of calcareous sands. As the b-value increases from 0 to 1, a simultaneous decrease in the stiffness and volumetric contraction behaviors of calcareous sands has been observed.
Shear behavior of calcareous sands in three-dimensional stress
Geotechnical problem analyses often involve three-dimensional stress conditions. In this paper, a series of drained true triaxial tests were conducted under stress-controlled conditions to investigate the effect of the intermediate principal stress on the mechanical behavior of calcareous sands. All stress paths, characterized by different intermediate principal stress coefficients (b-values) and terminal stress ratios (η), were maintained on the same deviatoric plane. The experimental results indicate that the deformation behavior of calcareous sands in three-dimensional stress is highly influenced by the b-values, particularly in the intermediate and minor principal directions, leading to notable anisotropy. The deviatoric stress–strain curves show that the deviatoric strain effectively represents the three-dimensional strain behavior of calcareous sands. As the b-value increases from 0 to 1, a simultaneous decrease in the stiffness and volumetric contraction behaviors of calcareous sands has been observed.
Shear behavior of calcareous sands in three-dimensional stress
Acta Geotech.
Xiao, Yang (author) / Yang, Wenbao (author) / Yuan, Zhengxin (author) / Fang, Qingyun (author) / Liu, Shuang (author) / Liu, Hanlong (author)
Acta Geotechnica ; 19 ; 7655-7661
2024-11-01
7 pages
Article (Journal)
Electronic Resource
English
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