Dynamic Characteristics of Freezing–Thawing Aeolian Soil under Intermittent Cyclic Loading
Publication: International Journal of Geomechanics
Volume 23, Issue 10
Abstract
To investigate the dynamic characteristics of the soil in seasonally frozen areas under intermittent cyclic loading, a series of dynamic triaxial tests on frozen–thawed aeolian soil were conducted by using the global digital system dynamic triaxial apparatus (GDS-DYNTTS). The dynamic elastic modulus and the dynamic damping ratio of freeze–thaw aeolian soil under different effective consolidation confining pressures, freeze–thaw cycles, dynamic stress amplitudes, and vibration frequencies were investigated. The results demonstrated a “step-type” dynamic elastic modulus curve for freeze–thaw aeolian soil under intermittent cyclic loading, and higher values were found compared to when the soil was under continuous vibration load. The developmental trend of the dynamic damping ratio was divided into accelerated growth and stable stages. The dynamic damping ratio under the intermittent condition was lower than that under continuous vibration load, which indicated that the intermittent stage reduced the internal energy consumption of soil samples and provided an improved buffering capacity against the vibration load. Overall, the fractional-order mathematical model based on the time-hardening approach exhibited good prediction skills for the freezing–thawing aeolian soil dynamic elastic modulus under intermittent cyclic loading. The results of this study will provide beneficial guidelines for engineering construction and disaster prevention practices in areas with seasonally frozen soils.
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Data Availability Statement
All data, models, and codes generated or used during the study appear in the published article.
Acknowledgments
The authors gratefully acknowledge the helpful comments made by the reviewers. This work was supported by the National Natural Science Foundation of China (Grant Nos. 52104088 and 51978292), the Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University (Grant No. 2020007), the China Postdoctoral Science Foundation (No. 2022M713383), the Foundation of Liaoning Provincial Department of Education (No. LJKZ0361), and the Discipline Innovation Team of Liaoning Technical University (Grant No. LNTU20TD-08).
Author Contributions: Jiashun Liu: validation, formal analysis, conceptualization, methodology, and software. Yu Ren: investigation and writing—original draft. Kaixin Zhu: supervision and data curation. Hang Zhang: writing—reviewing and editing. Jiaxu Jin: validation and formal analysis.
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Published In
International Journal of Geomechanics
Volume 23 • Issue 10 • October 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Nov 21, 2022
Accepted: Apr 29, 2023
Published online: Jul 31, 2023
Published in print: Oct 1, 2023
Discussion open until: Dec 31, 2023
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