Effects of shear strength reduction strategies on safety factor of homogeneous slope based on a general nonlinear failure criterion

Zhao, Lianheng; Yang, Feng; Zhang, Yingbin; Dan, Han-Cheng; Liu, Weizheng

doi:10.1016/j.compgeo.2014.08.015

Cited by 56 publications

(16 citation statements)

References 33 publications

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“…where c f and φ f are the soil strength parameters necessary only to maintain the structure in limit equilibrium and are sometimes referred to as the mobilized strength parameters (Michalowski 2002;Zhao et al 2015). By substituting Eq.…”

Section: Pseudo-static Approachmentioning

confidence: 99%

Stability charts of the slope with tensile strength cut-off

Liu

2020

JGS Special Publication

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The tensile strength of the soil predicted by the classical Mohr-Coulomb (M-C) yield criterion is suspicious, because it is determined from the extrapolation of the test results in the compressive regime. In this case, the classical M-C yield criterion is modified by reducing the tensile strength in the tensile regime. An analytical approach under the framework of limit analysis is carried out incorporating with the modified yield criterion to obtain the upper-bound solutions of the slope stability. Stability charts for slopes with tensile strength cut-off under different seismic accelerations are provided. It is revealed that considering the effects of tension cut-off, the stability factor is reduced by 55% for vertical slopes subjected to seismic loads.

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Section: Pseudo-static Approachmentioning

confidence: 99%

Stability charts of the slope with tensile strength cut-off

Liu

2020

JGS Special Publication

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“…Es muss aber betont werden, dass die Anwendung der sogenannten Strength-reduction-method keineswegs eindeutige Ergebnisse liefert. Die mit solchen Methoden erhaltene Sicherheit hängt stark von der konkreten Anwendung der Reduktion der einzelnen Materialparameter ab [4], [5]. Auf jeden Fall zeigt die ϕ′-c′-Reduktion, dass die vorerwähnte Dichotomie zwischen geotechnik 39 (2016), Heft 2 Fall, so kann bei diesem Spannungszustand eine inhomogene Verformung einsetzen.…”

Section: Zur Rolle Der Materialmodelle Beim Standsicherheitsnachweisunclassified

Zur Rolle der Materialmodelle beim Standsicherheitsnachweis

et al. 2016

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“…Most experimental results show that the linear failure criterion is a special case of nonlinear failure criteria while the strength envelopes of almost all geo-materials are characteristically nonlinear. And most of these nonlinear failure methods are relativeby a complicated procedure, walking farer way from the simple computation, beyond most engineers' capacities and not suitable to wider application [8,12,13]. In our paper, a simple combined failure criterion with linear Mohr-Coulomb failure criterion and maximum principal tensile stress criterion are employed to determine the shear failure zone and tensile failure zone as follows (Eqn.7 & Fig.…”

Section: Combined Failure Criterionmentioning

confidence: 99%

Slope Stability Analysis Under Combined Failure Criteria

Kai¹,

Li²,

Cheng³

2016

TOCIEJ

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Strength reduction finite element method (SRFEM) has been widely used to analyze the slope stability. Strength Reduction Factor (SRF) is yielded as the slope Factor Of Safety (FOS) when a running-though shear failure zone comes into being, in which the Plastic Element EQuivalent strain (PEEQ) is employed as the judgment of shear failure initiation in this paper. Moreover, the filed variable is set as same as SRF along the solution processing, FOS can be directly determined as the cor-responding value of field variable when the shear failure zone goes through. Three typical slopes with varying foot gradients of 26.6, 45 and 78.7 in degree are analyzed and fantastic results have been yielded, well agreeing with the Spencer’s results, when the linear Mohr-coulomb failure criterion is employed. However, during the solution process, tensile failure zone initiates at the slope top while the plastic failure zone initiates at the slope toe and this indicates that the failure mode of slope is combined. The results show that the combined failure zone with plastic failure and tensile failure appears much earlier than the unique plastic failure zone, which indicates that the traditional analytic method and SRFEM based on the unique linear Mohr-coulomb plasticity criteria overestimated the slope stability factor.

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Effects of shear strength reduction strategies on safety factor of homogeneous slope based on a general nonlinear failure criterion

Cited by 56 publications

References 33 publications

Stability charts of the slope with tensile strength cut-off

Stability charts of the slope with tensile strength cut-off

Zur Rolle der Materialmodelle beim Standsicherheitsnachweis

Slope Stability Analysis Under Combined Failure Criteria

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