Accumulative strain of clays in cold region under long-term low-level repeated cyclic loading: Experimental evidence and accumulation model

Li, Qionglin; Ling, Xianzhang; Wang, Lina; Zhang, Feng; Wang, Jiahui; Peng-Ju, Xu

doi:10.1016/j.coldregions.2013.06.008

Cited by 31 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hazirbaba et al [24] observed that Mable Creek silt soil during 1, 2 and 4 freeze-thaw cycles causes an excess pore pressure reduction. Li et al [23] studied the influence of freeze-thaw processes on the accumulative axial strain of clay under long-term low-level repeated cyclic loading. There are limited discussions on the laboratory approaches to investigate the dynamic behaviors of frozen soil subjected to freeze-thaw cycles.…”

Section: Introductionmentioning

confidence: 99%

Dynamic shear modulus and damping ratio of frozen compacted sand subjected to freeze–thaw cycle under multi-stage cyclic loading

Xue

Zhang

et al. 2015

Soil Dynamics and Earthquake Engineering

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Dynamic shear modulus and damping ratio of frozen compacted sand subjected to freeze–thaw cycle under multi-stage cyclic loading

Xue

Zhang

et al. 2015

Soil Dynamics and Earthquake Engineering

View full text Add to dashboard Cite

“…Especially dynamic load that is induced by earthquake, such as the 8.1-magnitude Kunlun Mountains earthquake in November 2001, caused serious cracks on some sections of the Qinghai-Tibet highway and the Qinghai-Tibet railway [10], seriously threatening the safety of the infrastructures. Long-term dynamic load may lead to vertical deformation exceeding the acceptable limit, and the infrastructures may lose serviceability [11]. erefore, many investigations on the dynamic properties of frozen soil have been conducted [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Long-term dynamic load may lead to vertical deformation exceeding the acceptable limit, and the infrastructures may lose serviceability [11]. erefore, many investigations on the dynamic properties of frozen soil have been conducted [11][12][13][14][15]. But, those works mainly focus on dynamic properties of the frozen soil under constant confining pressure (CCP) condition.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Parameters and Hysteresis Loop Characteristics of Frozen Silt Clay under Different Cyclic Stress Paths

Liu

Zhou

et al. 2021

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

In cold regions, the long-term stability of engineering facilities is unavoidably influenced by the negative temperature, freeze-thaw process, dry-wet process, and dynamic loading conditions induced by earthquakes and traffic loads. In order to investigate the effects of different cyclic stress paths on the evolution of dynamic mechanical properties of frozen silt clay, a series of cyclic triaxial tests with variation confining pressure (VCP) or constant confining pressure (CCP) were performed. Triaxial low-temperature apparatus (MTS-810) was taken advantage of to simulating various cyclic stress paths by changing cyclic loading conditions of axial stress and confining pressure. In this paper, the evolution features of the axial resilient modulus, damping ratios, and the shape of hysteresis loops with an increase in the number of load cycles under different dynamic stress paths are comprehensively studied. The results show that the loading angle of cyclic stress path and the phase difference between cyclic axial stress and confining pressure are the main factors that remarkably affect the development characteristics of the resilient modulus and damping ratio. With increasing of the loading angle and phase difference, the resilient modulus increases, but damping ratio increases with increasing of loading angle and with decreasing of phase difference. With the continuous increase in the number of loading cycles, the samples of frozen soil show compacting and hardening characteristics. With an increase in the number of load cycles, the shape of hysteresis loop becoming narrows, the resilient modulus decreases at the initial stage and then gradually increases, and the damping ratio stably decreases. According to contrastively analyzing the evolution of dynamic parameters and the shape features of hysteresis loops under various cyclic stress paths, it can be clearly discovered that the evolution of sample microstructure and the development of dynamic characteristics of frozen samples have obvious dependence on the cyclic stress path. Therefore, the effects of variable confining pressure (VCP) on dynamic behaviors of frozen soils are nonnegligible in practical cold region engineering.

show abstract

“…The bonding energy is the total energy dissipated by breakage of bonds and can be defined by (18) based on the law of conservation of energy:…”

Section: Energy Evolution Of Frozen Soilmentioning

confidence: 99%

“…Therefore, frozen soil is in nature the discrete material. However, it is generally treated as the continuum material [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

DEM Investigation of Particle-Scale Mechanical Properties of Frozen Soil Based on the Nonlinear Microcontact Model Incorporating Rolling Resistance

Xue

Geng

et al. 2018

Mathematical Problems in Engineering

Self Cite

View full text Add to dashboard Cite

Although frozen soil is in nature the discrete material, it is generally treated as the continuum material. The mechanical properties of frozen soil are so complex to describe adequately by conventional continuum mechanics method. In this study, the nonlinear microcontact model incorporating rolling resistance is proposed to investigate the particle-scale mechanical properties of frozen soil. The failure mechanism of frozen soil is explicated based on the evolution of contact force chains and propagation of microcracks. In addition, the effects of contact stiffness ratio and friction coefficient on stress-strain curve and energy evolution are evaluated. The results show that the nonlinear microcontact model incorporating rolling resistance can better describe the experimental data. At a higher axial strain, the contact force chains near shear band which can give rise to the soil arch effect rotate away from the shear band inclination but not so much as to become perpendicular to it. The propagation of microcracks can be divided into two phases. The stress-strain curve is strongly influenced by contact stiffness ratio. In addition, friction coefficient does not significantly affect the initial tangential modulus. Compared with frictional coefficient, the effect of contact stiffness ratio on stress-strain curve and energy evolution is greater.

show abstract

Accumulative strain of clays in cold region under long-term low-level repeated cyclic loading: Experimental evidence and accumulation model

Cited by 31 publications

References 13 publications

Dynamic shear modulus and damping ratio of frozen compacted sand subjected to freeze–thaw cycle under multi-stage cyclic loading

Dynamic shear modulus and damping ratio of frozen compacted sand subjected to freeze–thaw cycle under multi-stage cyclic loading

Dynamic Parameters and Hysteresis Loop Characteristics of Frozen Silt Clay under Different Cyclic Stress Paths

DEM Investigation of Particle-Scale Mechanical Properties of Frozen Soil Based on the Nonlinear Microcontact Model Incorporating Rolling Resistance

Contact Info

Product

Resources

About