Cyclic loading and unloading true triaxial tests on remolded loess

SHAO Shuai; ZHANG Jiaqing; SHAO Shengjun; SONG Jiayao; YAN Guangyi; ZHU Xueliang

doi:10.11779/CJGE20230307

Volume 46 Issue 7

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Chinese Journal of Geotechnical Engineering > 2024 > 46(7): 1491-1497. > DOI: 10.11779/CJGE20230307

SHAO Shuai, ZHANG Jiaqing, SHAO Shengjun, SONG Jiayao, YAN Guangyi, ZHU Xueliang. Cyclic loading and unloading true triaxial tests on remolded loess[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(7): 1491-1497. DOI: 10.11779/CJGE20230307

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Cyclic loading and unloading true triaxial tests on remolded loess

1.
Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048, China
2.
State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi'an University, Xi'an 710048, China
3.
Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi'an University, Xi'an, Shaanxi 710048, China
4.
China Railway First Survey and Design Institute Group Co., Ltd., Xi'an 710043, China

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Received Date: April 10, 2023
Available Online: September 21, 2023

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Abstract

Abstract

Aiming at the development characteristics of cumulative plastic strain of loess under different stress paths under cyclic loading and unloading conditions, the remolded loess is taken as the research object, and the round-trip loading and unloading tests under different stress paths are conducted using a true triaxial apparatus to explore the influences of different stress paths and amplitudes on the cyclic stress time-history curve, hysteresis curve, backbone curve and cumulative plastic strain curve of loess. The results reveal the effects of the stress paths on the mechanical properties of the remolded loess, describe the correlation among each principal stress, ratio of the intermediate principal stress and the stress amplitude, and the hysteresis curve of the remolded loess is proposed to be approximately elliptical, with the slope of the major axis increasing with the increase of the ratio of the principal stress and decreasing with the increase of the stress amplitude. As the value of the ratio of the principal stress ratio increase, the backbone curve of cyclic stress-strain hardens accordingly, the cumulative plastic strain curve decreases in sequence, and the cumulative plastic strain develops earlier and enters a gentle stage. The research results provide a reference for solving the relevant problems in loess engineering.
- true triaxial apparatus,
- cyclic stress,
- ratio of intermediate principal stress,
- hysteretic curve,
- backbone curve,
- cumulative plastic strain

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References (19)

References

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