A Sample Preparation Method and its Effect on Static and Cyclic Deformation-Strength Properties of Sand

Miura, Seiichi; Toki, Shosuke

doi:10.3208/sandf1972.22.61

Cited by 298 publications

(75 citation statements)

References 8 publications

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“…The observed difference in strength is apparently attributable to the effect of cross-anisotropy. Similar observations have been further confirmed by many laboratory tests (Miura and Toki 1982;Azami et al 2010;Gao et al 2010). Meanwhile, the undrained shear strength and cyclic liquefaction resistance of sand, which are of great concern in earthquake engineering design, are also found to be strongly dependent on the degree of fabric anisotropy and the relative orientation between the loading direction and material fabric Toki 1982, 1984;Yoshimine et al 1998;Uthayakumar and Vaid 1998;Oda et al 2001;Sze and Yang 2014).…”

Section: Introductionsupporting

confidence: 71%

“…The function h m is proposed based on the observations of monotonic sand behavior wherein the shear modulus increases as the void ratio decreases and the anisotropic variableĀ increases (Li and Dafalias 2012). The term ð1 þ FÞ 2 is used to render h 1 to decrease with F. This is based on experimental observations that more anisotropic sand samples show a higher rate of positive excess pore pressure accumulation in undrained cyclic loading under otherwise identical conditions (Miura and Toki 1982;Sze and Yang 2014).…”

Section: Plastic Modulus and Dilatancy Relation For Constant Mean Strmentioning

confidence: 99%

“…11(a and b) show the undrained cyclic triaxial test results on Toyoura sand prepared by two different methods (Miura and Toki 1982). The monotonic triaxial test results indicate that the sample prepared by the wet rodding method is approximately isotropic (Miura and Toki 1982), and thus F 0 ¼ 0 is used in the simulations [ Fig.…”

Section: Model Simulations For Sand Behavior In Cyclic Simple Shearmentioning

confidence: 99%

“…11(c)]. The sample prepared by the multiple sieving pluviation method is found to be initially anisotropic (Miura and Toki 1982), and its initial degree of anisotropy is set to be F 0 ¼ 0.22 based on best fitting of the effective stress path shown in Fig. 11(b and d).…”

Section: Model Simulations For Sand Behavior In Cyclic Simple Shearmentioning

confidence: 99%

“…Meanwhile, the undrained shear strength and cyclic liquefaction resistance of sand, which are of great concern in earthquake engineering design, are also found to be strongly dependent on the degree of fabric anisotropy and the relative orientation between the loading direction and material fabric Toki 1982, 1984;Yoshimine et al 1998;Uthayakumar and Vaid 1998;Oda et al 2001;Sze and Yang 2014). For instance, Miura and Toki (1982) and Sze and Yang (2014) found that sand deposits with a higher degree of anisotropy (bedding plane is horizontal) show higher undrained shear strength in monotonic triaxial compression tests but lower liquefaction resistance in undrained cyclic triaxial tests. This is mainly because sand samples that are more anisotropic show more contractive responses in the triaxial extension side in cyclic loading.…”

Section: Introductionmentioning

confidence: 99%

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Constitutive Modeling of Anisotropic Sand Behavior in Monotonic and Cyclic Loading

Gao

Zhao

2015

J. Eng. Mech.

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An anisotropic plasticity model is proposed to describe the fabric effect on sand behavior under both monotonic and cyclic loading conditions within the framework of anisotropic critical state theory. The model employs a cone-shaped bounding surface in the deviatoric stress space and a yield cap perpendicular to the mean stress axis to describe sand behavior in constant mean stress shear and constant stress ratio compression, respectively. The model considers a fabric tensor characterizing the internal structure of sand associated with the void space system and its evolution with plastic deformation. The fabric evolution law is assumed to render the fabric tensor to become codirectional with the loading direction tensor and to reach a constant magnitude of unit at the critical state. In constant stress ratio compression, the final degree of anisotropy is proportional to a normalized stress ratio. An anisotropic variable defined by a joint invariant of the fabric tensor and loading direction tensor is employed to describe the fabric effect on sand behavior in constant mean stress monotonic and cyclic shear. A systematic calibrating procedure of the model parameters is presented. Satisfactory comparison is found between the model simulations and test results on Toyoura sand in both monotonic and cyclic loadings with a single set of parameters. The important role of fabric and fabric evolution in capturing the sand behavior is highlighted. Limitations and potential improvement of the model in describing cyclic mobility of very dense sand and sand behavior in nonproportional loading have been discussed.

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Section: Introductionsupporting

confidence: 71%

Section: Plastic Modulus and Dilatancy Relation For Constant Mean Strmentioning

confidence: 99%

Section: Model Simulations For Sand Behavior In Cyclic Simple Shearmentioning

confidence: 99%

Section: Model Simulations For Sand Behavior In Cyclic Simple Shearmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Constitutive Modeling of Anisotropic Sand Behavior in Monotonic and Cyclic Loading

Gao

Zhao

2015

J. Eng. Mech.

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References

2016

Triaxial Testing of Soils

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Barodesy with a new concept for critical void ratio

Kolymbas

2021

Geotechnik

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With a new concept for the critical void ratio, barodesy yields promising simulations of element tests. Some shortcomings of this theory hitherto when simulating the behaviour of sand can be overcome by generalizing the widespread assumption that the critical void ratio is a function of the mean stress. Barodesy deviates from established lines of thought in soil mechanics. The interested reader can judge from this article whether this paradigm shift is worthwhile.

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A Sample Preparation Method and its Effect on Static and Cyclic Deformation-Strength Properties of Sand

Cited by 298 publications

References 8 publications

Constitutive Modeling of Anisotropic Sand Behavior in Monotonic and Cyclic Loading

Constitutive Modeling of Anisotropic Sand Behavior in Monotonic and Cyclic Loading

References

Barodesy with a new concept for critical void ratio

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