New Constitutive Equation of Clay and the Prediction of Horizontal Deformations of Large Scale Embankments

Mizuno, Kenta; Tsuchida, Takashi; Kobayashi, Masaki; Watabe, Yoichi

doi:10.2208/jscejc.63.936

Cited by 1 publication

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“…The concept of rotational hardening, which assumes that the development of anisotropy is accompanied by the development of plastic deformation [8], the concept of sub-loading yield surface, which can describe the plastic deformation behavior in the over-consolidation region represented by cyclic stress [9] and the concept of super-loading yield surface, which can describe the soil structure [10,11]. Mizuno et al also proposed the yield function of the original Cam Clay type of the Sekiguchi-Ohta model to a modified Cam Clay type with an elliptical shape [12]. These proposed models have been incorporated into finite element analysis programs to predict settlement and lateral displacement, and their analytical accuracy has been discussed.…”

Section: Introductionmentioning

confidence: 99%

A Yield Function and Undrained Behavior of K0 Consolidated Clays

Imai¹

2023

GEOMATE

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The Cam Clay model, now sometimes called the classical model, cannot reproduce strainsoftening behavior. The minimum principal effective stress σ3 constant line for 0 K normally consolidated clay is a straight line with slope three in the space of mean effective stress p and axial differential stress q, which is located inside the yield surface in the Cam Clay model. In other words, there is a region in the Cam Clay model where the stress state of normal consolidation is judged to be over-consolidation. In this study, undrained and drained triaxial compression tests were conducted to clarify the problems of the Cam Clay model described above, and an anisotropic yield function was proposed. Results of the consolidated drained triaxial test showed that the plastic strains occurred when the applied minimum principal stress σ3 exceeded the past maximum pressure. This result shows that the yield surface for normally consolidated clay is located near the constant line of the minimum principal effective stress. The void ratio of the clay decreased despite the unloading test into the yield surface of the Cam Clay model, which exhibits elastic behavior. This experimental result can emphasize that the stress change in the yield surface causes plastic strain in the clay. The strain softening behavior can be approximated by the proposed yield function if the degree of strain softening is small.

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Section: Introductionmentioning

confidence: 99%

A Yield Function and Undrained Behavior of K0 Consolidated Clays

Imai¹

2023

GEOMATE

View full text Add to dashboard Cite

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New Constitutive Equation of Clay and the Prediction of Horizontal Deformations of Large Scale Embankments

Cited by 1 publication

References 11 publications

A Yield Function and Undrained Behavior of K0 Consolidated Clays

A Yield Function and Undrained Behavior of K0 Consolidated Clays

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