Simulation of yielding and stress–stain behavior of shanghai soft clay

Huang, Maosong; Liu, Yanhua; Sheng, Daichao

doi:10.1016/j.compgeo.2010.12.005

Cited by 98 publications

(34 citation statements)

References 26 publications

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“…[27] and Huang et al [28], the initial anisotropic tensor a 0 induced in the initial anisotropic consolidation is obtained through the deviatoric tensor s 0 and the preconsolidated stress condition p 0 as…”

Section: Rotational Hardeningmentioning

confidence: 99%

Implicit and explicit integration schemes in the anisotropic bounding surface plasticity model for cyclic behaviours of saturated clay

Chen

Liu

2014

Computers and Geotechnics

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a b s t r a c tTwo integration algorithms, namely the implicit return mapping and explicit sub-stepping schemes, are adopted in the anisotropic bounding surface plasticity model for cyclic behaviours of saturated clay and are implemented into finite element code. The model is a representative of a series of bounding surface models that have typical characteristics, including isotropic and kinematic hardening rules and a rotational bounding surface to capture complex but important cyclic behaviours of soils, such as cyclic shakedown and degradation. However, there is no explicit current yield surface in the model to which the conventional implicit algorithm returns the stress state back or the sub-stepping integration corrects the drift of the stress state. Hence, necessary modifications have been made for both of the integration schemes. First, the image stress point is mapped or corrected to the bounding surface instead of mapping back or correcting the stress state to the yield surface. Second, the unloading-loading criterion is checked to determine the image stress point rather than checking the yield criterion after giving the trial stress state in a conventional way. Comparative studies on the accuracy, stability and efficiency of the two integration schemes are conducted not only at the element level but also in solving boundary value problems of monotonic and cyclic bearing behaviours of rigid footings on saturated clay. For smaller strain increments, there is no significant difference in the accuracy between the two integration schemes, but the explicit integration shows a higher efficiency and accuracy. For relatively larger increments, the implicit return mapping algorithm presents good accuracy and more robustness, while the sub-stepping algorithm shows deteriorating accuracy and suffers the convergence problem. With the tolerance used in the present model, the bearing capacity of the rigid footing predicted by the return mapping algorithm is closer to the available analytical and numerical solutions, while the bearing capacity predicted by the sub-stepping algorithm shows a marginal increase.

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Section: Rotational Hardeningmentioning

confidence: 99%

Implicit and explicit integration schemes in the anisotropic bounding surface plasticity model for cyclic behaviours of saturated clay

Chen

Liu

2014

Computers and Geotechnics

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“…In this section, the performance of the proposed model is examined by simulating the behaviour of shanghai soft clay (Huang et al 2011). Undrained shear behaviour of shanghai soft soil in conventional triaxial test with different levels of confining pressures are considered.…”

Section: Performance Of the Proposed Modelmentioning

confidence: 99%

A new structured subloading cam clay model

Zhang

Teng

et al. 2015

JGS Special Publication

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A theoretical study of the behavior of structured soil is presented in this paper. By introducing the influence of soil structure and loading history into the Cam Clay model, a new model is formulated. The concept of the difference of void ratios is modified to combine the structure parameter and the overconsolidation ratio and the evolution law is proposed. The new model is a two yield surface model by introducing the concept of the subloading yield surface. By making comparisons of predictions with experimental results, it is demonstrated that the new model provides satisfactory qualitative modelling of many important features of the behavior of structured soils.

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“…The optimization results are shown in Table 4. The values of Huang et al (2011) and Zhu et al (2013). Using the optimal parameters, the objective tests were simulated (Fig.…”

Section: Application To Soft Shanghai Claymentioning

confidence: 99%

“…According to Huang et al (2011), undisturbed samples of Shanghai clay were taken at depths of 10 m, with in situ horizontal consolidation stress σ′ hc =41 kPa and vertical consolidation stress σ′ vc = 68.6 kPa. The initial mean effective stress p′ c was determined to be 50.3 kPa.…”

Section: Application To Soft Shanghai Claymentioning

confidence: 99%

An efficient parameter identification procedure for soft sensitive clays

Liang

Jin

Shen

et al. 2016

JZUS-A

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Abstract:The creep and destructuration characteristics of soft clay are always coupled under loading, making it difficult for engineers to determine these related parameters. This paper proposes a simple and efficient optimization procedure to identify both creep and destructuration parameters based on low cost experiments. For this purpose, a simplex algorithm (SA) with random samplings is adopted in the optimization. Conventional undrained triaxial tests are performed on Wenzhou clay. The newly developed creep model accounting for the destructuration is enhanced by anisotropy of elasticity and adopted to simulate tests. The optimal parameters are validated first by experimental measurements, and then by simulating other tests on the same clay. Finally, the proposed procedure is successfully applied to soft Shanghai clay. The results demonstrate that the proposed optimization procedure is efficient and reliable in identifying creep and destructuration related parameters.

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Simulation of yielding and stress–stain behavior of shanghai soft clay

Cited by 98 publications

References 26 publications

Implicit and explicit integration schemes in the anisotropic bounding surface plasticity model for cyclic behaviours of saturated clay

Implicit and explicit integration schemes in the anisotropic bounding surface plasticity model for cyclic behaviours of saturated clay

A new structured subloading cam clay model

An efficient parameter identification procedure for soft sensitive clays

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