OcrV1, Main, Exploration, bibRecord, 000199

Effect of Pre-Shear Stress Path on Nonlinear Shear Stiffness Degradation of Cohesive Soils

Identifieur interne : 000199 ( Main/Exploration ); précédent : 000198; suivant : 000200

Effect of Pre-Shear Stress Path on Nonlinear Shear Stiffness Degradation of Cohesive Soils

Auteurs : Jinhyun Choo [États-Unis, Corée du Sud] ; Young-Hoon Jung [Corée du Sud] ; Wanjei Cho [Corée du Sud] ; Choong-Ki Chung [Corée du Sud]

Source :

ASTM geotechnical testing journal [ 0149-6115 ] ; 2013.

RBID : Pascal:13-0235843

Descripteurs français

Pascal (Inist)
- Essai sol, Sol cohérent, Essai triaxial, Contrainte cisaillement, Chemin contrainte, Etude expérimentale, Appareil triaxial, Dégradation, Rigidité.

English descriptors

KwdEn :
- Cohesive soil, Degradation, Experimental study, Shear stress, Soil test, Stiffness, Stress path, Triaxial cell machine, Triaxial test.

Abstract

The nonlinear degradation of soil stiffness from very small to small strain is a key consideration for reliable prediction of ground behavior and its interactions with structures under dynamic excitation and working load conditions. Despite high sensitiveness of stiffness measurement to testing conditions, the effect of the pre-shear stress path on the stiffness degradation has not been properly discussed. Here we investigate the effect of pre-shear stress path on nonlinear shear stiffness degradation of cohesive soils. Reconstituted kaolinite specimens were consolidated to be the overconsolidation ratio (OCR)=1, 2, and 4 along K_o and isotropic stress paths. The shear stiffness degradations of the specimens during undrained shear were measured using on-specimen linear variable differential transformers (LVDTs). Experimental results show that the pre-stress stress path has a strong influence on the degree of shear stiffness degradation at different OCRs. This influence is interpreted within the context of the rotation angle of shear stress path, which provides a good qualitative explanation of the inconsistent observations in the literature.

Affiliations:

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 000054
to stream PascalFrancis, to step Curation: 000714
to stream PascalFrancis, to step Checkpoint: 000042
to stream Main, to step Merge: 000202
to stream Main, to step Curation: 000199

Le document en format XML

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<term>Sol cohérent</term>
<term>Essai triaxial</term>
<term>Contrainte cisaillement</term>
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<front><div type="abstract" xml:lang="en">The nonlinear degradation of soil stiffness from very small to small strain is a key consideration for reliable prediction of ground behavior and its interactions with structures under dynamic excitation and working load conditions. Despite high sensitiveness of stiffness measurement to testing conditions, the effect of the pre-shear stress path on the stiffness degradation has not been properly discussed. Here we investigate the effect of pre-shear stress path on nonlinear shear stiffness degradation of cohesive soils. Reconstituted kaolinite specimens were consolidated to be the overconsolidation ratio (OCR)=1, 2, and 4 along K<sub>o</sub>
 and isotropic stress paths. The shear stiffness degradations of the specimens during undrained shear were measured using on-specimen linear variable differential transformers (LVDTs). Experimental results show that the pre-stress stress path has a strong influence on the degree of shear stiffness degradation at different OCRs. This influence is interpreted within the context of the rotation angle of shear stress path, which provides a good qualitative explanation of the inconsistent observations in the literature.</div>
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Effect of Pre-Shear Stress Path on Nonlinear Shear Stiffness Degradation of Cohesive Soils

Effect of Pre-Shear Stress Path on Nonlinear Shear Stiffness Degradation of Cohesive Soils

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri