About: Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.enggeo.2013.05.026
Description	A formalism for double structure hydromechanical coupled modelling of aggregated unsaturated soils has been developed. Independent coupled hydromechanical models are considered for each structural level, including independent measures of macromechanical and micromechanical effective stresses. The models are linked using a coupling function to obtain the global response. The individual components have been selected to represent the behaviour of compacted expansive clays. The macrostructural mechanical model is based on the existing hypoplastic model for unsaturated soils. Hydromechanical coupling at each structural level is efficiently achieved by linking the effective stress formulation with the water retention model. An essential component of the model is representation of microstructural swelling. It is demonstrated that its calibration on wetting induced expansion measured in oedometric (mechanical) tests leads to a correct global hydraulic response, providing a supporting argument for the adopted coupling approach. An interesting consequence of the model formulation is that it does not suffer from volumetric rachetting, which is often regarded as one of the main drawbacks of hypoplasticity. The proposed model has a small number of material parameters. Its predictive capabilities have been confirmed by simulation of comprehensive experimental data set on compacted Boom clay. A formalism for double structure hydromechanical coupled modelling of aggregated unsaturated soils has been developed. Independent coupled hydromechanical models are considered for each structural level, including independent measures of macromechanical and micromechanical effective stresses. The models are linked using a coupling function to obtain the global response. The individual components have been selected to represent the behaviour of compacted expansive clays. The macrostructural mechanical model is based on the existing hypoplastic model for unsaturated soils. Hydromechanical coupling at each structural level is efficiently achieved by linking the effective stress formulation with the water retention model. An essential component of the model is representation of microstructural swelling. It is demonstrated that its calibration on wetting induced expansion measured in oedometric (mechanical) tests leads to a correct global hydraulic response, providing a supporting argument for the adopted coupling approach. An interesting consequence of the model formulation is that it does not suffer from volumetric rachetting, which is often regarded as one of the main drawbacks of hypoplasticity. The proposed model has a small number of material parameters. Its predictive capabilities have been confirmed by simulation of comprehensive experimental data set on compacted Boom clay. (en)
Title	Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays (en)
skos:prefLabel	Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays (en)
skos:notation	RIV/00216208:11310/13:10174009!RIV14-GA0-11310___
http://linked.open...avai/predkladatel	Přírodovědecká fakulta
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP105/12/1705)
http://linked.open...iv/cisloPeriodika	October
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Mašín, David
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	70511
http://linked.open...ai/riv/idVysledku	RIV/00216208:11310/13:10174009
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Water retention curve; Hydromechanical behaviour; Hypoplasticity; Unsaturated soils; Double structure; Expansive soils (en)
http://linked.open.../riv/klicoveSlovo	Hypoplasticity Expansive soils Hydromechanical behaviour Unsaturated soils Water retention curve Double structure
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[2199A88A3B4A]
http://linked.open...i/riv/nazevZdroje	Engineering Geology
http://linked.open...in/vavai/riv/obor	JM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	1 (xsd:int)
http://linked.open...vavai/riv/projekt	Development of advanced numerical methods for geomaterials
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	165
http://linked.open...iv/tvurceVysledku	Mašín, David
http://linked.open...ain/vavai/riv/wos	000327284100008
issn	0013-7952
number of pages	16 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.enggeo.2013.05.026
http://localhost/t...ganizacniJednotka	11310

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