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Influence of Wet-Dry Cycles on Uniaxial Compression Behavior of Fissured Loess Disturbed by Vibratory Loads
https://orcid.org/http://orcid.org/0000-0003-1728-9536
https://orcid.org/http://orcid.org/0000-0002-8023-9390
https://orcid.org/http://orcid.org/0000-0003-4811-8983
https://orcid.org/http://orcid.org/0000-0002-4176-4520
https://orcid.org/http://orcid.org/0000-0002-8484-1223
https://orcid.org/http://orcid.org/0000-0003-1517-5236
In this study, the influence of wet-dry cycles on the uniaxial compression behavior of fissured loess after vibration was investigated by small shaking table tests, wet-dry tests, and uniaxial compression tests. Results show that the initial elastic modulus and peak strength both decline after wet-dry cycles while the morphology of stress-strain curves shows insignificant changes. Except for samples with a fissure angle α = 45°, where the bimodal stress-strain curves were observed, all show softening trend. The failure mode can be classified into four main types: fracture failure (α = 0° and 15°), slip-fracture coupled failure (α = 45°), slip failure (α = 60°), and compression shear failure (α = 30° and 90°). The failure modes of samples at α = 0°, 15°, 45°, and 60° are independent of wet-dry cycles but strongly depend on fissure angle, while those at the other fissure angles are more susceptible to wet-dry cycles. The uniaxial compressive strength (UCS) of fissured loess samples before vibration are greater than those after vibration. The relationship between UCS and fissure angle before and after vibration show double-valley pattern. A binary medium model for fissured loess considering vibration and wet-dry cycles was constructed, which was verified by test data.
Influence of Wet-Dry Cycles on Uniaxial Compression Behavior of Fissured Loess Disturbed by Vibratory Loads
https://orcid.org/http://orcid.org/0000-0003-1728-9536
https://orcid.org/http://orcid.org/0000-0002-8023-9390
https://orcid.org/http://orcid.org/0000-0003-4811-8983
https://orcid.org/http://orcid.org/0000-0002-4176-4520
https://orcid.org/http://orcid.org/0000-0002-8484-1223
https://orcid.org/http://orcid.org/0000-0003-1517-5236
In this study, the influence of wet-dry cycles on the uniaxial compression behavior of fissured loess after vibration was investigated by small shaking table tests, wet-dry tests, and uniaxial compression tests. Results show that the initial elastic modulus and peak strength both decline after wet-dry cycles while the morphology of stress-strain curves shows insignificant changes. Except for samples with a fissure angle α = 45°, where the bimodal stress-strain curves were observed, all show softening trend. The failure mode can be classified into four main types: fracture failure (α = 0° and 15°), slip-fracture coupled failure (α = 45°), slip failure (α = 60°), and compression shear failure (α = 30° and 90°). The failure modes of samples at α = 0°, 15°, 45°, and 60° are independent of wet-dry cycles but strongly depend on fissure angle, while those at the other fissure angles are more susceptible to wet-dry cycles. The uniaxial compressive strength (UCS) of fissured loess samples before vibration are greater than those after vibration. The relationship between UCS and fissure angle before and after vibration show double-valley pattern. A binary medium model for fissured loess considering vibration and wet-dry cycles was constructed, which was verified by test data.
Influence of Wet-Dry Cycles on Uniaxial Compression Behavior of Fissured Loess Disturbed by Vibratory Loads
https://orcid.org/http://orcid.org/0000-0003-1728-9536
https://orcid.org/http://orcid.org/0000-0002-8023-9390
https://orcid.org/http://orcid.org/0000-0003-4811-8983
https://orcid.org/http://orcid.org/0000-0002-4176-4520
https://orcid.org/http://orcid.org/0000-0002-8484-1223
https://orcid.org/http://orcid.org/0000-0003-1517-5236
In this study, the influence of wet-dry cycles on the uniaxial compression behavior of fissured loess after vibration was investigated by small shaking table tests, wet-dry tests, and uniaxial compression tests. Results show that the initial elastic modulus and peak strength both decline after wet-dry cycles while the morphology of stress-strain curves shows insignificant changes. Except for samples with a fissure angle α = 45°, where the bimodal stress-strain curves were observed, all show softening trend. The failure mode can be classified into four main types: fracture failure (α = 0° and 15°), slip-fracture coupled failure (α = 45°), slip failure (α = 60°), and compression shear failure (α = 30° and 90°). The failure modes of samples at α = 0°, 15°, 45°, and 60° are independent of wet-dry cycles but strongly depend on fissure angle, while those at the other fissure angles are more susceptible to wet-dry cycles. The uniaxial compressive strength (UCS) of fissured loess samples before vibration are greater than those after vibration. The relationship between UCS and fissure angle before and after vibration show double-valley pattern. A binary medium model for fissured loess considering vibration and wet-dry cycles was constructed, which was verified by test data.
Influence of Wet-Dry Cycles on Uniaxial Compression Behavior of Fissured Loess Disturbed by Vibratory Loads
KSCE J Civ Eng
Xu, Jian (author) / Zhou, Liyang (author) / Hu, Ke (author) / Li, Yanfeng (author) / Zhou, Xiangang (author) / Wang, Songhe (author)
KSCE Journal of Civil Engineering ; 26 ; 2139-2152
2022-05-01
14 pages
Article (Journal)
Electronic Resource
English
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