A 1D Compression Model for Loess Based on Disturbed State Concept

Xu, Yongbin

doi:10.18280/rcma.290208

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…e disturbed state concept (DSC) is a constitutive simulation method developed by Desai in 1974. e development of the DSC was based on the mechanical disturbance of materials [15,16,21,22]. According to this concept, a disturbance of material microstructure can inevitably trigger a change in its macroscopic mechanical properties.…”

Section: E Disturbed State Conceptmentioning

confidence: 99%

“…e disturbed state theory was proposed by Desai in 1974, who also established an elastic-plastic model for clay [15][16][17][18][19]. Xu [20][21][22] investigated the mechanical properties of structural loess in Xi'an and proposed a one-dimensional disturbance function. e evolution law of the one-dimensional disturbance function was analyzed, and a disturbance constitutive model for structural loess was also developed.…”

Section: Introductionmentioning

confidence: 99%

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Disturbance Evolution Behavior of Loess Soil under Triaxial Compression

Guo

2020

Advances in Civil Engineering

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This paper presents an investigation into the evolution law of the structural effects of Xi’an loess soil, based on the disturbed state concept. First, a series of consolidated and drained triaxial compression tests were performed on undisturbed and remoulded loess samples prepared at five different moisture contents and tested at four different confining pressures. Second, two disturbance functions with different parameters were proposed to quantify mathematically the structural effects of loess. Finally, the proposed disturbance functions were validated against documented test results by other researchers. The results indicated that the single-parameter disturbance function, with the deformation modulus as its parameter, provides convenience for application but takes no account of the respective contributions of deviatoric stress and mean stress to the disturbance evolution behavior of loess. The double-parameter disturbance function, with the shear and bulk moduli as its parameters, is capable of distinguishing these respective contributions and reflects well the disturbance evolution behavior of loess under various moisture contents and confining pressures. The effects of moisture content and confining pressure on the parameters of the disturbance functions were found to be unsteady. The proposed disturbance functions lay the foundation for establishing a constitutive model for loess accounting for the structural effect.

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Section: E Disturbed State Conceptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Disturbance Evolution Behavior of Loess Soil under Triaxial Compression

Guo

2020

Advances in Civil Engineering

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Experiment Study on the Compression Resilience of Loess

2020

IOP Conf. Ser.: Earth Environ. Sci.

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Due to structure form of particles and the characteristics of loess, such as high strength and incomplete consolidation, in order to research the influence of structure on compression and resilience characteristics of loess, the compression resilience test for undisturbed soil and remoulded soil and compression resilience recompression test for undisturbed soil is carried out under five kinds of different water content. The results show that: the structure has great influence on the compression and resilience characteristics of loess, especially after or before the structure damage. And the structured yield stress is bigger, resilience characteristics is more and more strong. Moreover, when pre-consolidation pressure is ascertained, the structure must be considered. The research of compression and resilience characteristics of loess lays a foundation for proposing a new method of ascertaining pre-consolidation pressure.

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Modelling the Triaxial Compression Behavior of Loess Using the Disturbed State Concept

Guo

Wang

et al. 2021

Advances in Civil Engineering

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This paper investigates the triaxial compression behaviour of Q3 loess soil and the construction of a constitutive model accounting for the structural effect of loess on the basis of the disturbed state concept. By analyzing the triaxial compression testing results, we have established a new disturbing function with respect to the volumetric and shear moduli parameters. A research into the evolution laws of the disturbing function was also conducted, followed by the construction of a constitutive model for loess soil as well as the verification of the constitutive model with model test results. The results indicate that the double-parameter disturbing function evolves in an exponential form, capturing well the effect of moisture content and confining pressure on the loess structural behavior. The parameters of the constructed constitutive model based on the disturbed state are easy to be obtained and have clarified physical meanings. Considering the effectiveness in capturing the structural behavior of the loess, the constructed constitutive model has a great potential to be applied in the engineering practice in the loess area. The constructed constitutive model based on the disturbed state concept provides new ideas for the study of the structural constitutive model of loess, which is theoretically significant.

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A 1D Compression Model for Loess Based on Disturbed State Concept

Cited by 3 publications

References 13 publications

Disturbance Evolution Behavior of Loess Soil under Triaxial Compression

Disturbance Evolution Behavior of Loess Soil under Triaxial Compression

Experiment Study on the Compression Resilience of Loess

Modelling the Triaxial Compression Behavior of Loess Using the Disturbed State Concept

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