Plastic shakedown limit of compacted clay: Experiments and predicted model

Cui, Kai; Qing, Yulan; Li, Qionglin; Zhang, Dongjie; Li, Pangju; Liu, Jie

doi:10.1016/j.enggeo.2023.107057

Cited by 4 publications

(2 citation statements)

References 45 publications

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“…The shakedown in the field of cyclic loading is divided into three categories of the soil response to cyclic loading: Plastic shakedown, which can be depicted as a close-up hysteresis loop in stress-strain function. In this case, the deviator stress value is low, and after a few cycles of loading, no additional plastic strains are observed [24]. Cyclic plastic creep is a phenomenon observed during constant loading tests.…”

Section: Introductionmentioning

confidence: 79%

Cohesive Soil Behavior Under Cyclic Loading in Undrained Conditions

Głuchowski

2024

GEOMATE

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In this paper, a study of the cyclic plastic creep phenomenon during cyclic loading was performed. The plastic creep phenomena in the field of soil cyclic loading are defined as a process that occurs under a medium stress state and leads to excessive accumulation of plastic strains. Recent literature shows the existence of plastic creep, which is a part of the shakedown theory for cohesive soils. Nevertheless, when the soil is subjected to a relatively small stress state, the axial plastic strain may occur as a phenomenon called abation, where plastic strain increment occurs in a constant decreasing manner. Cyclic triaxial tests were performed to understand the abation. The results indicate a specific phase in soil response, such as pre-failure stages marked by pore pressure increase and subsequent effective stress reduction, indicating a steady state during repeating loading. In this paper, the proposition of a cyclic plastic creep mechanism based on test results is presented. The soil response was divided into three phases based on the pore pressure, stress paths, resilient modulus, and plastic strain change analysis.

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Section: Introductionmentioning

confidence: 79%

Cohesive Soil Behavior Under Cyclic Loading in Undrained Conditions

Głuchowski

2024

GEOMATE

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“…For the subgrade materials, many researchers proposed different standards to judge the permanent deformation behaviors and calculated the different deformation areas boundaries and critical dynamic stress, such as for unbound granular material (Gu et al, 2017;Xiao et al, 2018a;Xiao et al, 2018b;Zhao et al, 2022), coarse-grained soil (Leng et al, 2017;Zhai et al, 2020;Wang and Zhuang, 2021), fine-grained soil (Zhang et al, 2020b;Li et al, 2021;Cui et al, 2023c), and frozen soil (Wang et al, 2018;Zhou et al, 2020;Zhou et al, 2022). For the highway engineering practice, the sustainable design and hazard prevention of pavement structures demand an in-depth understanding of the plastic deformation and shakedown behavior of the thawed subgrade soils to further meet the requirement of long-term serviceability.…”

Section: Introductionmentioning

confidence: 99%

Investigation on shakedown response-behavior of thawed subgrade soils under long-term traffic loading

Wang,

Li,

et al. 2024

Front. Earth Sci.

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The shakedown state of the subgrade is crucial for the sustainable design and long-term stability evaluation of pavement structures. In order to characterize the plastic deformation and shakedown behavior of subgrade soil in seasonal frozen regions, cyclic triaxial tests were conducted on the thawed subgrade soil after seven cycles of freeze-thaw. The influences of the numbers of cycle loading, the amplitude of cyclic deviator stress, and the confining stress were considered variables. The evolution features of accumulative plastic strain, accumulative plastic strain rate, and critical dynamic stress were experimentally analyzed. Based on the shakedown theory, the ensuing discoveries were that the accumulative plastic strain response-behavior of thawed subgrade soil was typically divided into plastic shakedown, plastic creep, and incremental collapse under the long-term cyclic loading. Furthermore, the shakedown standard for thawed subgrade soil was also proposed based on the evolution of the accumulative plastic strain rate. The critical dynamic stresses can be obtained by the proposal formula to determine the different plastic deformation ranges.

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