Influence of stress history on the cyclic behavior of compacted soils in the frozen state: Deviator stress history

Li, Qionglin; Cui, Kai; Xiang, Jing; Li, Pangju; Dong, Heng

doi:10.1016/j.soildyn.2021.107074

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…Zhu et al [24] carried out the triaxial creep tests on the frozen sand under different conditions to study the temperature, dry density, and particle size distribution on the creep properties. Li et al [25] carried out strain-controlled monotonic triaxial tests and stress-controlled cyclic triaxial tests to study the influence of deviator stress history on the cyclic behavior of compacted frozen soils.…”

Section: Introductionmentioning

confidence: 99%

A Binary Medium Model for Frozen Silty Sand Simplified by Breakage Parameter

et al. 2022

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In order to investigate the strength-deformation characteristics of frozen silty sand, the triaxial compressive strength tests of saturated frozen silty sand under different fine particle contents were carried out, and the binary medium theory was introduced to interpret the stress-strain relationship. Due to the characteristics of the existing binary medium model with many parameters and complicated determination method, a simplified binary medium model based on breakage parameter is proposed. The derived model was verified by the triaxial tests of frozen silty sand. The results show that the stress-strain relationship can be divided into three stages with the increase of axial strain, namely, linear elastic deformation stage, plastic deformation stage, and strain softening stage. All three stages can be well explained by the transformation theory of bonded element and frictional element with the binary medium model. In the linear elastic deformation stage, the external stress is mainly borne by the bonded element. In the plastic deformation stage, the stress sharing ratio of the bonded element decreases and that of the frictional element increases. In the strain softening stage, the stress sharing ratio of the bonded element decreases rapidly, while that of the frictional element increases rapidly. Under the same confining pressure, both deviator stress and the maximum values of bulk expansion decrease, while the shear strength decreases linearly with the increase of fine particle content. By comparing the measured deviator stress in triaxial test with the calculated values of binary medium constitutive model simplified by breakage parameter, the proposed model can better simulate the stress-strain relationship of frozen silty sand. The results of the study can provide some theoretical reference for the constitutive model of seasonal frozen soil.

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Section: Introductionmentioning

confidence: 99%

A Binary Medium Model for Frozen Silty Sand Simplified by Breakage Parameter

et al. 2022

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“…As a result, the deformation of soil subjected to long-term, low-level, repeated cyclic loading, such as traffic loading, is smaller. In addition, some important structures, such as expressways and high-speed railways, should not undergo even small displacements [19]. Hence, the mechanical properties of soft soil are vitally important for the long-term reliable operation of expressways and high-speed railways in coastal areas [20,21].…”

Section: Introductionmentioning

confidence: 99%

Cyclic and Post-Cyclic Behaviors of Stabilized Sand-Containing Soft Soil in Coastal Areas

Zhao

et al. 2022

Sustainability

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Land resources are being depleted due to global climate change, and as a result, infrastructures such as expressways and high-speed railways have no option but to be built in soft soil regions. Hence, the cyclic and post-cyclic behaviors of soft soil are vitally important. However, little attention has been devoted to this issue. In the current study, a series of cyclic triaxial tests and standard monotonic loading tests were carried out in order to investigate the cyclic and post-cyclic behavior of stabilized sand-containing soft soil. In addition, the stiffness evolution index model was proposed to describe the characteristics of stiffness evolution. The results show that for a given number of loading cycles, stiffness almost linearly decreases with the increase in sand content. The higher the confining pressure is, the greater the stiffness is. The cement content has the greatest impact on the stiffness evolution index. The stiffness evolution index model can provide a good description of experimental data. The initial value of post-cyclic axial strain is non-zero due to the accumulative strain caused by previous cyclic loading. Post-cyclic stress increases rapidly within a small range of strain and can reach peak stress with great speed. The post-cyclic initial tangent modulus increases from 1602 kPa to 4803 kPa as the cement content increases from 6% to 12%.

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Influence of the initial static stress state on the accumulation behaviour of a coarse-grained soil under long-term cyclic loading

Cui

Zhang

et al. 2023

Soil Dynamics and Earthquake Engineering

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Influence of stress history on the cyclic behavior of compacted soils in the frozen state: Deviator stress history

Cited by 5 publications

References 24 publications

A Binary Medium Model for Frozen Silty Sand Simplified by Breakage Parameter

A Binary Medium Model for Frozen Silty Sand Simplified by Breakage Parameter

Cyclic and Post-Cyclic Behaviors of Stabilized Sand-Containing Soft Soil in Coastal Areas

Influence of the initial static stress state on the accumulation behaviour of a coarse-grained soil under long-term cyclic loading

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