Anisotropy of Undrained Shear Strength of Clays under Axi-Symmetric Loading Conditions

Ohta, Hideki; Nishihara, Akira

doi:10.3208/sandf1972.25.2_73

Cited by 26 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Natural soils often possess certain anisotropy resulting from their complex deposition and loading–unloading histories. Anisotropy plays a major role in the mechanical properties of soft clays 53 . One source of soil anisotropy comes from the K 0 anisotropic consolidation, where K 0 is defined as the horizontal to vertical effective stress ratio.…”

Section: Evaluation Of Model Performancesmentioning

confidence: 99%

“…Anisotropy plays a major role in the mechanical properties of soft clays. 53 One source of soil anisotropy comes from the 𝐾 0 anisotropic consolidation, where 𝐾 0 is defined as the horizontal to vertical effective stress ratio. Gens 48 conducted drained triaxial compression tests on anisotropically normally consolidated LCT, while Stipho 54 conducted undrained triaxial compression tests on anisotropically normally consolidated kaolin clay (KC1).…”

Section: Anisotropic Consolidationmentioning

confidence: 99%

See 1 more Smart Citation

A multifidelity neural network (MFNN) for constitutive modeling of complex soil behaviors

Su,

Guo,

Yang

2023

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

The development and calibration of soil models under the framework of plasticity is notoriously challenging given the prismatic features in soil's shear behaviors. Data‐driven deep neural networks (DNNs) offer an alternative approach to this formidable task. However, classical DNN models struggle to accurately capture soil mechanical responses using limited training data. To address this issue, a unified multifidelity neural network (MFNN) is proposed to leverage the accuracy of high‐fidelity experimental datasets and the abundance of low‐fidelity datasets synthesized using the modified Cam‐clay (MCC) model. The MFNN model can automatically learn the correlation between the low‐fidelity and high‐fidelity datasets, and has been applied to predicting the mechanical responses of over‐consolidated and anisotropically consolidated clays, cement‐treated clays, silts sheared under varying temperatures, and suction‐controlled unsaturated soils. The results demonstrate significantly improved prediction capabilities of MFNN compared to purely data‐driven DNNs. The proposed MFNN framework holds encouraging promise to revolutionize constitutive modeling of complex soil behaviors.

show abstract

Section: Evaluation Of Model Performancesmentioning

confidence: 99%

Section: Anisotropic Consolidationmentioning

confidence: 99%

A multifidelity neural network (MFNN) for constitutive modeling of complex soil behaviors

Su,

Guo,

Yang

2023

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…That is, under isotropic and anisotropic consolidation, the soil reaches different ultimate limit states. For clay, the anisotropy of the undrained shear strength is the result of stress-induced anisotropy (Ohta & Nishihara, 1985). This anisotropy occurs when the initial stress state acting during K 0 -consolidation is changed by increasing shear stress up to failure under undrained conditions, along with principal stress rotation.…”

Section: Limitations Of the MCC Modelmentioning

confidence: 99%

Consolidated undrained capacity of shallow foundations subjected to self-weight and horizontal in-service loading

Vulpe

Newman

2016

Géotechnique

View full text Add to dashboard Cite

The effect of subsea infrastructure self-weight and pipeline in-service horizontal loading on the consolidated undrained capacity of deep-water shallow foundations was investigated by means of fully coupled three-dimensional finite-element analyses. The results show that the undrained uniaxial and combined capacity increase under horizontal preloading and over realistic in-field loading time regimes. The gain in undrained capacity is quantified through simple equations incorporating a critical state soil mechanics framework and is defined as a function of magnitude and duration of vertical and horizontal preload, foundation embedment ratio and soil-skirt interface roughness.

show abstract

“…This phenomenon is called structural anisotropy. It is hard to separate the effects of both types of anisotropy, hence the subject of consideration is most often socalled anisotropy [16]. However, if the soil in the subsoil is homogeneous in terms of physical properties, the principal stress rotation is the basic factor causing anisotropy of shear strength parameters.…”

Section: Introductionmentioning

confidence: 99%

Archives of Civil Engineering

Wrzesiński

2021

View full text Add to dashboard Cite

The paper presents the phenomenon of principal stress rotation in cohesive subsoil resulting from its loading or unloading and the impact of this phenomenon on the values of soil shear strength parameters: undrained shear strength τfu, effective cohesion c', effective angle of internal friction φ'. For this purpose, tests in a triaxial apparatus and torsional shear hollow cylinder apparatus on selected undisturbed cohesive soils: sasiCl, saclSi, clSi, Cl, characterized by different index properties were carried out. Soil shear strength parameters were determined at angle of principal stress rotation α equal to 0° and 90° in tests in triaxial apparatus and α equal to 0°, 15°, 30°, 45°, 60°, 75°, 90° in tests in torsional shear hollow cylinder apparatus. The results of laboratory tests allow to assess the influence of the principal stress rotation on the shear strength parameters that should be used to determine the bearing capacity of the subsoil.

show abstract

Anisotropy of Undrained Shear Strength of Clays under Axi-Symmetric Loading Conditions

Cited by 26 publications

References 13 publications

A multifidelity neural network (MFNN) for constitutive modeling of complex soil behaviors

A multifidelity neural network (MFNN) for constitutive modeling of complex soil behaviors

Consolidated undrained capacity of shallow foundations subjected to self-weight and horizontal in-service loading

Archives of Civil Engineering

Contact Info

Product

Resources

About