Failure of a soft cohesive soil subjected to combined static and cyclic loading

Patiño, Hernán; Soriano, A. Sánchez; González, J. León

doi:10.1016/j.sandf.2013.10.010

Cited by 27 publications

(4 citation statements)

References 17 publications

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“…(iii) OCR, which affects the effective stress paths and the degradation of the undrained shear modulus, [46]; [47]; [48]. (iv) and finally, the static pre-shearing factor that may decrease the cyclic shear strength thus improve the total shear strength, [49]; [50]; [51]; [52]; [53]. Carter et al ( ,1982 [54] and [55] proposed a soil constitutive model based on MCC model, in which one additional parameter which defines the model cyclic behaviour is needed alongside with the parameters of MCC model.…”

Section: Cam-clay Modelmentioning

confidence: 99%

Nonlinear numerical simulation of physical shaking table test, using three different soil constitutive models

Alisawi

Collins

Cashell

2021

Soil Dynamics and Earthquake Engineering

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Section: Cam-clay Modelmentioning

confidence: 99%

Nonlinear numerical simulation of physical shaking table test, using three different soil constitutive models

Alisawi

Collins

Cashell

2021

Soil Dynamics and Earthquake Engineering

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“…The fourth stratum has a thickness greater than 40 m and is gravel and sand with interlayers of clay. Moreover, Patiño et al and Martinez et al [37,47] have described the behavior of the soil as typically plastic, with evidence of a contractive behavior due to the positive porewater pressure; therefore, it corresponds to a soil that is normally consolidated or with a low degree of consolidation.…”

Section: Description Of Experimental Datamentioning

confidence: 99%

Long-term dynamic bearing capacity of shallow foundations on a contractive cohesive soil

Lazcano

Galindo

Patiño³

2021

Acta Geotech.

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The calculation of the long-term dynamic bearing capacity arises from the need to consider the generation of maximum pore-water pressure developed from a cyclic load. Under suitable conditions, a long-term equilibrium situation would be reached, when pore-water pressures stabilized. However, excess pore-water pressure generation can lead to cyclic softening. Consequently, it is necessary to define both the cohesion and the internal friction angle to calculate the dynamic bearing capacity of a foundation in the long term, being necessary to incorporate the influence of the self-weight of soil and therefore the width of the foundation. The present work is based on an analysis of the results of cyclic simple shear tests on soil samples from the port of El Prat in Barcelona. From these experimental data, a pore-water pressure generation formulation was obtained that was implemented in FLAC2D finite difference software. A methodology was developed for the calculation of the maximum cyclic load that a footing can resist before the occurrence of the cyclic softening. The type of soil studied is a contractive cohesive soil, which generates positive pore-water pressures. As a numerical result, design charts have been developed for long-term dynamic bearing capacity calculation and the charts were validated with the application of a real case study.

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“…Furthermore, it was found that for loading with small amplitudes below a certain threshold, no accumulation of excess pore water pressure occurs 12,14 Sustained shear stress : If cyclic loading is applied around a significant average shear stress, the cyclic resistance of clays generally decreases 12,15–17 . Furthermore, permanent strains gradually accumulate in the direction of the sustained stress—an effect often referred to as ratcheting .…”

Section: Introductionmentioning

confidence: 99%

A multisurface kinematic hardening model for the behavior of clays under combined static and undrained cyclic loading

Stoecklin

Friedli

Puzrin

2020

Num Anal Meth Geomechanics

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In dynamic geotechnical problems, soils are often subjected to a combination of sustained static and fast cyclic loading. Under such loading conditions, saturated and normally consolidated clays generally experience a build‐up of excess pore water pressure along with a degradation of stiffness and strength. If the strength of the soil falls below the static stress demand, a self‐driven failure is triggered. In this paper, a constitutive model is presented for the analysis of such problems, based on a general multisurface plasticity framework. The hardening behavior, the initial arrangement of the surfaces, and the nonassociated volumetric flow rule are defined to capture important aspects of cyclic clay behavior. This includes nonlinear hysteretic stress‐strain behavior, the effect of anisotropic consolidation, and the generation of excess pore water pressure during undrained cyclic loading along with a degradation of stiffness and strength. The model requires nine independent parameters, which can be derived from standard laboratory tests. A customized experimental program has been performed to validate the model performance. The model predictions show a good agreement with test results from monotonic and cyclic undrained triaxial tests, in particular with respect to the strain‐softening response and the number of loading cycles to failure. A procedure for a general stress‐space implicit numerical implementation for undrained, total stress‐based finite element analyses is presented, including the derivation of the consistent tangent operator. Finally, a simulation of the seismic response of a submarine slope is shown to illustrate a possible application of the presented model.

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Failure of a soft cohesive soil subjected to combined static and cyclic loading

Cited by 27 publications

References 17 publications

Nonlinear numerical simulation of physical shaking table test, using three different soil constitutive models

Nonlinear numerical simulation of physical shaking table test, using three different soil constitutive models

Long-term dynamic bearing capacity of shallow foundations on a contractive cohesive soil

A multisurface kinematic hardening model for the behavior of clays under combined static and undrained cyclic loading

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