Effects of Drying–Wetting Cycle and Fines Content on Hysteresis and Dynamic Properties of Granite Residual Soil under Cyclic Loading

Chen, Dongxia; Tang, Jiawei; Yang, Xuefei

doi:10.3390/app13116660

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…The soil specimen was prepared by the compaction method in a mold with 39.1 mm in diameter and 80 mm in height. After compaction, the mold was removed and the specimen was sealed in cling film [41][42][43]. In order to study the influence of moisture content and stress level on the permanent deformation characteristics of Yellow River alluvial silt, silt specimens with three moisture contents were prepared in this paper.…”

Section: Test Materials and Specimen Preparationmentioning

confidence: 99%

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Effect of Moisture Content on the Permanent Strain of Yellow River Alluvial Silt under Long-Term Cyclic Loading

Du,

Zhang,

Wang

et al. 2023

Sustainability

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The Yellow River alluvial silt has unique engineering properties and is unstable when encountering moisture. The mechanical properties of silt subgrade can be impaired by the increase in moisture content due to rainwater infiltration, which has a negative effect on traffic safety. To further reveal the influence of moisture content on the deformation characteristics of silt, a series of monotonic and cyclic triaxial tests were conducted on the alluvial silt with different moisture contents. The development law of cyclic accumulative permanent strain and the effects of moisture content, cyclic deviator stress and confining pressure on the axial permanent strain of silt were explored. The study shows that the static strength of silt decreases with the increase in moisture content, and the attenuation of static strength is mainly caused by the decrease in cohesion due to the reduction in matric suction. The permanent strain rises linearly with the increase in moisture content and cyclic deviator stress, and decreases with the increase in confining pressure. An empirical model for predicting the permanent strain of silt under long-term cyclic loading considering the effect of moisture content was established. Compared with the test data and other existing models, the established model has easier obtained parameters, higher prediction accuracy and better applicability.

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Section: Test Materials and Specimen Preparationmentioning

confidence: 99%

Section: Test Materials and Specimen Preparationmentioning

confidence: 99%

Effect of Moisture Content on the Permanent Strain of Yellow River Alluvial Silt under Long-Term Cyclic Loading

Du,

Zhang,

Wang

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…Numerous studies have examined the degradation of the engineering properties of GRS caused by drying-wetting (DW) cycles. The impact of DW cycles on the macroscopic mechanical behavior of GRS has been investigated [10][11][12]. For instance, Jian et al [13] found that the cohesion of GRS decreased significantly during the early stages of DW cycles, then gradually stabilized over time, while the internal friction angle did not exhibit a clear change.…”

Section: Introductionmentioning

confidence: 99%

Effect of Drying–Wetting Cycle and Vibration on Strength Properties of Granite Residual Soil

Tang,

Chen

2024

Applied Sciences

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Granite residual soil (GRS) exhibits favorable engineering properties in its natural state. However, a hot and rainy climate, combined with vibrations generated during mechanical construction, can cause a notable decrease in its strength. In this study, the evolution of stress–strain curves and strength parameters (cohesion c and internal friction angle φ), unconfined compression strength (UCS) under drying and wetting(DW) cycles and vibration were investigated by means of direct shear test and UCS test. Furthermore, modified formulas for calculating shear strength and UCS under DW cycles and vibration were proposed, and their accuracy was verified. The results are as follows: The stress–strain curve of shear strength exhibits strain-hardening characteristics, and the shear compressibility of the sample increases with the number of DW cycles and vibration time. However, the stress–strain curve of UCS shows strain-softening properties, and the peak strength shifts forward with the number of DW cycles and vibrations. With the increase in the number of DW cycles and the vibration time, c shows a non-linear degradation, with a maximum degradation of 58.6%. φ fluctuates and increases due to the densification effect of DW cycles, but the influence of vibration on φ decreases with the increase in the number of DW cycles. UCS rapidly decreases and gradually stabilizes after DW cycles and vibration, with a maximum degradation of 81.1%. This study can serve as a reference for the stability analysis of GRS pits subjected to long-term influences of hot and rainy climates and mechanical vibration, providing valuable insights for future research.

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A Thorough Investigation of the Dynamic Properties of Granite under Cyclic Loading

Ding,

Zhao,

Dong

et al. 2023

Applied Sciences

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We propose a novel inverse analysis method that utilizes shockwaves to detect the operational condition of tested rock. To achieve this back analysis, an in-depth investigation of the dynamic properties of granite specimens was conducted. The dynamic properties of the granite specimens were investigated using a triaxial cyclic loading machine, under different confining pressures, loading frequencies, stress amplitudes, and numbers of cycles, and a dynamic response model was constructed from the test data. The results show that the dynamic elastic modulus increased with the increase in confining pressure, while its damping ratio decreased. The dynamic elastic modulus and damping ratio increased with the increase in loading frequency. As the dynamic stress amplitude increased, the dynamic elastic modulus of the granite increased, but the dynamic damping ratio decreased. As the number of cycles increased, the dynamic elastic modulus and dynamic damping ratio of the granite decreased and gradually stabilized. The modified Duncan–Chang model was used to construct the dynamic response model of the specimens. It is worth saying that the correlation coefficient of the model is low at a loading frequency of 20 Hz. This indicates that the frequency has a greater effect on the dynamic response of the specimen compared with the confining pressure. The conclusions obtained from these tests can be used to study more comprehensively the interaction and causal relationship between different factors, and to prepare for the next steps of tunnel rock stress-state prediction.

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Effects of Drying–Wetting Cycle and Fines Content on Hysteresis and Dynamic Properties of Granite Residual Soil under Cyclic Loading

Cited by 3 publications

References 29 publications

Effect of Moisture Content on the Permanent Strain of Yellow River Alluvial Silt under Long-Term Cyclic Loading

Effect of Moisture Content on the Permanent Strain of Yellow River Alluvial Silt under Long-Term Cyclic Loading

Effect of Drying–Wetting Cycle and Vibration on Strength Properties of Granite Residual Soil

A Thorough Investigation of the Dynamic Properties of Granite under Cyclic Loading

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