A rate-dependent constitutive model for saturated frozen soil considering local breakage mechanism

Wang, Pan; Liu, Enlong; Zhi, Bin; Song, Benru

doi:10.1016/j.jrmge.2022.11.017

Cited by 17 publications

(3 citation statements)

References 59 publications

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“…By substituting Eqs ( 14) and (15) into Eq (13) and rearranging, the expression for the stress increment under general stress conditions can be obtained as follows:…”

Section: Plos Onementioning

confidence: 99%

“…Previous research on remolded soils has made significant achievements. Various constitutive models for soils, such as the Cambridge model, Duncan-Chang model, and others, have been proposed and widely applied [ 15 , 16 ]. Moreover, remarkable achievements have also been made in the research on the microstructure of remolded soils [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties of artificially structured soil and Binary-medium-based constitutive model under undrained conditions

Li,

Liu,

2024

PLoS ONE

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To investigate the mechanical properties and constitutive models of structured soil under undrained conditions, triaxial compression tests on initially anisotropic structured soil, isotropic structured soil, and remolded soil were conducted under consolidation undrained conditions at confining pressures of 25, 50, 100, and 200 kPa, respectively. The results demonstrate that the samples of structured soils with strong structural characteristics have an obvious yield strength when the consolidation stress is low. At this time, the pore water pressure in structured soils increases at the beginning of loading. As the axial strain increasing, it turns to reduce. When failure, the samples have obvious shear band. With the consolidation stress increases, the mechanical properties and deformation mechanism of structured soils are near to the remolded soil. Combining the Binary-medium theory with the analysis and discussion of the mechanical properties and deformation mechanisms of structured soil, the rationality of the corresponding Binary-medium model was verified, which shows that the constitutive model can reflect the characteristics of dilatancy and strain softening, volumetric contraction and strain hardening under the conditions of low and high confining pressure respectively. At the same time, the constitutive model can also reflect the differences in the stress-strain characteristics of the two structural soils caused by the structural differences. In general, the results agree with the experiment relative well.

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“…By substituting Eqs ( 14) and (15) into Eq (13) and rearranging, the expression for the stress increment under general stress conditions can be obtained as follows:…”

Section: Plos Onementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical properties of artificially structured soil and Binary-medium-based constitutive model under undrained conditions

Li,

Liu,

2024

PLoS ONE

Self Cite

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“…With the rapid development of computer technology, the numerical analysis method has become an important and practical tool and provides an economical way to study the seismic behavior of embankments in permafrost regions. Wang et al [12,13] studied the earthquake dynamic stress characteristic and seismic displacement characteristic of the roadbed on permafrost site, and then proposed the stress intensity criteria of earthquake breakage. Esmaeili and Noghabi [14] developed a fniteelement model to investigate the dynamic behavior of ballasted railway tracks subjected to earthquake motion.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Qinghai-Tibetan Railway Embankment in Permafrost Regions: A Case Study

Chen

Wang

2023

Shock and Vibration

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The temperature is a critical factor that determines the unfrozen water content and ice content in the frozen soil. In view of mechanical properties of the frozen soil depend on the volume of components of the four-phase systems, thus the temperature has a significant impact on the mechanical behaviors and deformation properties. The thermal state of the embankment in permafrost regions has a significant seasonal difference, then the seismic performance of the embankment alters with the season. In addition, the seismic performance is highly influenced by the properties of the earthquake motion, especially the seismic intensity. Combining these factors, a numerical simulation was conducted in this study. In this study, taking a typical section of Qinghai-Tibet Railway as an example, a numerical case study on the seismic behavior of embankment was carried out using the dynamic explicit FEM code ABAQUS/Explicit. The El Centro excitation with different intensities was performed in numerical analysis and two distinct thermal states of the embankment in extreme cold and warm days were considered as well. The seismic behaviors of the embankment, including the acceleration responses, the strain response, and the displacement response, were studied effectively. This paper proposes approaches and methods to study the seismic failure mechanism of the infrastructures, and the results can serve as a scientific basis for resisting earthquakes and preventing disasters in cold regions.

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Strength criterion for intact loess under high-temperature action

Zhi,

Wang,

Liu

et al. 2024

Bull Eng Geol Environ

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A rate-dependent constitutive model for saturated frozen soil considering local breakage mechanism

Cited by 17 publications

References 59 publications

Mechanical properties of artificially structured soil and Binary-medium-based constitutive model under undrained conditions

Mechanical properties of artificially structured soil and Binary-medium-based constitutive model under undrained conditions

Seismic Behavior of Qinghai-Tibetan Railway Embankment in Permafrost Regions: A Case Study

Strength criterion for intact loess under high-temperature action

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