Simulation of cement-improved clay structures with a bonded elasto-plastic model: A practical approach

Arroyo, Marcos; Ciantia, Matteo Oryem; Castellanza, Riccardo; Gens, Antonio; Nova, Roberto

doi:10.1016/j.compgeo.2012.05.008

Cited by 47 publications

(15 citation statements)

References 26 publications

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“…That may be disadvantageous, because several examples ( [5], [3]) show that structure-scale responses predicted numerically are strongly dependent on the constitutive model and that elastic-perfectly plastic models may not capture all relevant failure modes.…”

Section: Introductionmentioning

confidence: 99%

“…The model applied in this work, called herein "Cemented CASM" (C-CASM) is part of a suite of advanced models based on CASM that are described in [16]. This model has already been successfully applied to clays, both naturally structured ( [17] and [18]), and artificially cemented [5]. However, it is the first time a cemented granular soil is calibrated with this model.…”

Section: Constitutive Modelmentioning

confidence: 99%

“…It was only after inspecting the scarce results from undrained tests at high pressures that a value ( n = 2.2) was finally selected. Published calibrations on CASM-based models for other soils ( [5], [6], [13] and [17]) suggest a range for n between 1 and 3 and for r between 1 and 3. Figure 3 Normalized plot for the yield stress points of drained and undrained tests of uncemented specimens…”

Section: Basic Casm Parametersmentioning

confidence: 99%

“…Similarly, and because improved soils have analogies with concrete, cemented soils have been represented adapting models originally developed for concrete [4]. Taking a different perspective, a number of researchers have successfully extended elasto-plastic models for soils of the critical state tradition to represent artificially cemented clays [5] and silts [6]. This approach is directly inspired by a long line of constitutive models originally developed for naturally structured soils and soft rocks ( [7], [8] , [9], [10]) Despite all those developments it is fair to say that simplified, elastic perfectly plastic models (with either a Mohr-Coulomb or Tresca failure criterion) still dominate numerical applications (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The purpose of this work is to contribute to that goal of simplified calibration. A bonded elasto-plastic constitutive model, previously used to simulate cemented Bangkok clay [5] behaviour, is here used for a very different cemented soil, namely compacted cemented silty sand. While the Bangkok clay case was representative of products obtained by deep mixing "in situ", the case presented here is representative of the cemented soils used within engineered fills.…”

Section: Introductionmentioning

confidence: 99%

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Simplifying calibration of bonded elasto-plastic models

Rı́os

Ciantia

González

et al. 2016

Computers and Geotechnics

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Using realistic constitutive models for artificially cemented soils is advantageous in design. However, the price of that increased realism is often a more elaborate model, which is difficult to calibrate. A database of high quality triaxial tests on compacted cemented silty sand is used to calibrate and validate a generalized critical state bonded soil model. The exercise highlights the staged calibration procedure that is convenient in this kind of application. The calibration results have shown a direct relation between added yield strength and a well-established soil-cement mixture ratio, which facilitates the application of the model in design. It is shown that such relation can be also deduced from the analysis of unconfined compressive strength tests.

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Section: Introductionmentioning

confidence: 99%

Section: Constitutive Modelmentioning

confidence: 99%

Section: Basic Casm Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simplifying calibration of bonded elasto-plastic models

Rı́os

Ciantia

González

et al. 2016

Computers and Geotechnics

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Extension of plasticity theory to debonding, grain dissolution, and chemical damage of calcarenites

Ciantia¹,

Prisco

2015

Num Anal Meth Geomechanics

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The mechanical properties of calcarenites are known to be significantly affected by water saturation: both stiffness and strength decrease for wetting in the short term and for chemical dissolution in the long term. Both processes mainly affect bonds among grains: immediately after inundation depositional bonds fall in suspension whereas diagenetic bonds dissolve more slowly. In this paper, the authors started from the micro-structural analysis of the weathering processes to conceive a strain hardening hydro -chemo -mechanical coupled elasto-plastic constitutive model. The concept of extended hardening rules is here enriched: weathering functions have been determined by employing a micro to macro simple upscaling procedure.Chemical damage is incorporated in the formulation by means of a scalar damage function. Its evolution is also described by using a multiscale approach. A new term is added to the strain rate tensor in order to incorporate the dissolution induced chemical deformations developing once the soft rock is turned into a granular material. A calibration procedure for the constitutive parameters is suggested and the model is validated by using both coupled and uncoupled chemo mechanical experimental test results.2

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A Bounding Surface Model for Cement Stabilized Clay

Bandyopadhyay

Pillai

2020

Lecture Notes in Civil Engineering

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Simulation of cement-improved clay structures with a bonded elasto-plastic model: A practical approach

Cited by 47 publications

References 26 publications

Simplifying calibration of bonded elasto-plastic models

Simplifying calibration of bonded elasto-plastic models

Extension of plasticity theory to debonding, grain dissolution, and chemical damage of calcarenites

A Bounding Surface Model for Cement Stabilized Clay

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