Loading path dependence and non-linear stiffness at small strain using rate-dependent multisurface hyperplasticity model

Apriadi, Dedi; Likitlersuang, Suched; Pipatpongsa, Thirapong

doi:10.1016/j.compgeo.2012.11.007

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…2). Note that this type has similar characteristics as the flow potential of Apriadi et al (2013). The consequences of such a choice are prediction of rate 161 dependent (creep) swelling under isotropic unloading for positive (compressive) mean stress 162 (but negative χp), and a critical state line in p-q space (M) corresponding only to the reference 163 rate.…”

Section: Resultsmentioning

confidence: 99%

Modelling creep in clay using the framework of hyper-viscoplasticity

Grimstad

Dadrasajirlou

Amiri

2020

Géotechnique Letters

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This paper addresses the derivation of creep models using the framework of hyperviscoplasticity. It demonstrates that the formulations widely used already can easily be obtained using the hyper-viscoplastic formalism. This means that existing formulations (i.e. of the flow potential) are thermodynamically sound. The key assumptions are that the free energy is only a function of elastic strains and that there is no dissipation under pure volumetric swelling (tension). The presented derivations, using the framework of hyperviscoplasticity, allows for further model development along the same lines, as presented here, with only minor modifications.

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Section: Resultsmentioning

confidence: 99%

Modelling creep in clay using the framework of hyper-viscoplasticity

Grimstad

Dadrasajirlou

Amiri

2020

Géotechnique Letters

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“…The basic properties of the soil samples are summarized in Table 2. Through conducting four types of soil mechanics experiments [16]-triaxial consolidation drainage tests, triaxial consolidation drainage and unloading tests, standard consolidation tests, and resonant column tests-the stiffness parameters E 50,re f , E ur,re f , and E oed,re f and two small strain parameters G 0 and γ 0.7 of the HSS model were determined. The HSS model parameters of typical soil layers in the Changzhou area obtained by experiment are shown in Table 3.…”

Section: Geotechnical Experimentsmentioning

confidence: 99%

Optimization and Impact Assessment of Excavation Sequence around Subway Stations from the Perspective of Sustainable Urban Development

Li,

Liu,

et al. 2024

Buildings

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The construction of group foundation pits near subway stations often leads to environmental pollution, thereby causing certain damage to urban ecology. By optimizing the excavation sequence of group foundation pits, the adverse effects on surrounding underground structures and soil during excavation can be effectively mitigated, contributing to the sustainable development of cities. Taking a group foundation pit project in Changzhou as an example, this study utilized the finite element software PLAXIS 3D to simulate various working conditions under different excavation sequences, comparing the deformation of the subway station, shield tunnel, and surrounding soil. The results show that, influenced by the excavation of group foundation pits, the difference between maximum deformation and minimum deformation of shield tunnel is 25.85%, and the difference between the maximum deformation and minimum deformation of the subway envelope is 19.44%. The subway envelope is least affected by the change in excavation sequence. Both the displacement of the subway station and the surrounding soil exhibit a significant “cumulative effect”, with displacement changes closely related to the distance from the pit to the station and the ground, as well as the amount of soil unloaded in each excavation. Therefore, it is advisable to adhere to the principle of “far before near, shallow before deep, small before large” during excavation, which facilitates the coordinated development of urban infrastructure construction and the urban ecological environment, providing valuable reference and guidance for the sustainable development of cities.

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“…The introduction of a nonlinear isotropic hyperelastic formulations improves the predictive capability of the model within the yield surface as compared to the typical hypoelastic model adopted in the SANICLAY model, though we are aware that in that range the performance could be significantly improved by adopting a continuous hyperplastic approach (e.g. Einav & Puzrin, 2004a;Likitlersuang & Houlsby, 2006;Apriadi et al, 2013).…”

Section: Response Of the Modelmentioning

confidence: 99%