Prediction of Undrained Behavior of Isotropically and Anisotropically Consolidated Firoozkuh Sand: Instability and Flow Liquefaction

Lashkari, Ali; Karimi, Ali; Fakharian, Kazem; Kaviani-Hamedani, Farzad

doi:10.1061/(asce)gm.1943-5622.0000958

Cited by 50 publications

(20 citation statements)

References 55 publications

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“…According to the dynamic strength curves, the dynamic stress σ d required for failure cycles N f � 10, 20, and 30 when the confining pressure and the vibration frequency are different can be obtained, and then the major principal stress σ 1d and minor principal stress σ 3d under the dynamic failure condition can be calculated according to formula (2).…”

Section: Effects Of Vibration Frequency On Dynamic Strengthmentioning

confidence: 99%

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Experimental Study on the Effects of Initial Shear Stress and Vibration Frequency on Dynamic Strength of Saturated Sands

Zhang

Cao²,

Huang

2019

Advances in Materials Science and Engineering

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The cyclic triaxial system is used to investigate the effects of confining pressure, initial shear stress, cyclic stress ratio, and vibration frequency on the dynamic strength characteristics of saturated sand in the Wenchuan area. Results show that when the vibration frequency is constant, the dynamic strength of sand increases with the increase of the consolidation ratio. However, when the consolidation ratio exceeds a certain value, the dynamic strength of sand decreases or increases slowly. The dynamic internal friction angle first increases and then decreases with the increase of consolidation ratio, and the dynamic internal friction angle under different initial shear stresses differs by a maximum of about 12%. When the failure cycles are constant, the dynamic strength and the dynamic internal friction angle of the sand increase with the increase of vibration frequency, and the dynamic internal friction angle at different frequencies differs by a maximum of about 7%. When the cyclic stress ratio is constant, the higher the vibration frequency, the greater the cycles required to achieve the failure. As the cyclic stress ratio decreases, the influence of the vibration frequency on the failure cycles is gradually reduced.

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Section: Effects Of Vibration Frequency On Dynamic Strengthmentioning

confidence: 99%

“…In 2008, Wenchuan, Sichuan Province, suffered an 8.0-magnitude earthquake with a maximum intensity of 11 degrees. It covered a total of 10 provinces and cities, and its destructiveness and difficulty of relief were quite rare where more than 80,000 people were dead or missing, causing major casualties and property losses [1,2].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effects of Initial Shear Stress and Vibration Frequency on Dynamic Strength of Saturated Sands

Zhang

Cao²,

Huang

2019

Advances in Materials Science and Engineering

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“…The model is based on the bounding surface plasticity framework and incorporates a newer generation of Bishop's effective stress concept. The model is an extension of an existing hyperelastic model, which was originally proposed by Lashkari et al [25] for simulating the elastoplastic behavior of fully saturated granular soils. In this model, elastic strains are computed from the Gibbs free energy.…”

Section: Introductionmentioning

confidence: 99%

Examining the predictive capabilities of a bounding surface plasticity-based hyperelastic constitutive model for unsaturated granular soils

Kadivar

Manahiloh

Kaliakin³

2021

MATEC Web Conf.

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The performance of a recently developed state-dependent constitutive model for unsaturated granular soils is evaluated. The model employs the Bounding Surface plasticity framework and evaluates elastic strains assuming hyperelastic behavior. To realistically simulate the deformation of unsaturated granular soils, the mechanical behavior was modeled without a purely elastic component. The inherent hydro-mechanical coupling was realized by introducing a Bishop-type effective stress, an appropriate work-conjugate variable, and a soil-water characteristic curve function. Relevant details about the model development, parameter estimation, and the assessment of the model’s predictive capabilities are presented. The model performance is evaluated with experimental data obtained for drained and constant-water stress paths. With a given a set of parameter values, the model realistically simulates the main features that characterize the shear and volumetric behavior of unsaturated granular soils over a wide range of matric suction, density, and net confining pressure. This is found to be true for both drained and constant-water stress paths.

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“…Initial shear stress inevitably exists on these clay foundations. Under cyclic loading, clay exhibits different dynamic characteristics, and its deformation and strength have become the focus of research [1][2][3]. To ensure the safety and stability of buildings in these areas, the dynamic strain and strength of saturated clay under cyclic loading must be examined.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Deformation and Strength Characteristics of Saturated Clay under Cyclic Loading

Zhang

Sun²,

Cao³

2020

Advances in Civil Engineering

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The deformation and strength characteristics of saturated clay are studied through a cyclic triaxial test of clay in the Wenchuan earthquake area. Specifically, the effects of cyclic stress ratio, initial shear stress, and vibration frequency on the dynamic characteristics of saturated clay are analysed. Results show a failure strain in the dynamic strain development of saturated clay. Before the failure strain, the dynamic strain of soil develops slowly. After the failure strain, the soil strain increases sharply and leads to failure. Under the same confining pressure, the failure strain produced by different cyclic stress ratios has a linear relationship with the failure frequency. The dynamic strain development curve of saturated clay can be simplified to failure, transition, and stability types, which are mainly affected by the cyclic stress ratio. Initial shear stress and vibration frequency have significant effects on the deformation and strength characteristics of saturated clay. The larger the initial shear stress or the lower the vibration frequency is, the more sufficient the dynamic strain of soil develops and the fewer the number of cycles required to reach the same dynamic strain. Under the same number of cycles, the larger the initial shear stress or the lower the vibration frequency, the smaller the dynamic stress required to cause soil failure and the lower the dynamic strength of the soil. A turning point exists in the dynamic strength curve of clay. The smaller the initial shear stress or the higher the vibration frequency, the smoother the curve after the turning point and the smaller the tangent slope.

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Prediction of Undrained Behavior of Isotropically and Anisotropically Consolidated Firoozkuh Sand: Instability and Flow Liquefaction

Cited by 50 publications

References 55 publications

Experimental Study on the Effects of Initial Shear Stress and Vibration Frequency on Dynamic Strength of Saturated Sands

Experimental Study on the Effects of Initial Shear Stress and Vibration Frequency on Dynamic Strength of Saturated Sands

Examining the predictive capabilities of a bounding surface plasticity-based hyperelastic constitutive model for unsaturated granular soils

Experimental Study on the Deformation and Strength Characteristics of Saturated Clay under Cyclic Loading

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