SOMEF

Critical State Soil Mechanics Revisited: Fabric Effects

Coordinatore	NATIONAL TECHNICAL UNIVERSITY OF ATHENS - NTUA    more Spiacenti, non ci sono informazioni su questo coordinatore. Contattare Fabio per maggiori infomrazioni, grazie.
Nazionalità Coordinatore	Greece [EL]
Totale costo	1˙924˙000 €
EC contributo	1˙924˙000 €
Programma	FP7-IDEAS-ERC Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	ERC-2011-ADG_20110209
Funding Scheme	ERC-AG
Anno di inizio	2012
Periodo (anno-mese-giorno)	2012-03-01   -   2018-02-28

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITE JOSEPH FOURIER GRENOBLE 1  Organization address address: "Avenue Centrale, Domaine Universitaire 621" city: GRENOBLE postcode: 38041 contact info Nome: Yann Cognome: Le Roux Email: send email Telefono: +33 476 514488 Fax: +33 476 514312	FR (GRENOBLE)	beneficiary	143˙000.00
2	CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE  Organization address address: Rue Michel -Ange 3 city: PARIS postcode: 75794 contact info Titolo: Dr. Nome: Guillaume Cognome: Rochet Email: send email Telefono: +33 4 67613535 Fax: +33 4 67043236	FR (PARIS)	beneficiary	78˙000.00
3	NATIONAL TECHNICAL UNIVERSITY OF ATHENS - NTUA  Organization address address: HEROON POLYTECHNIOU 9 ZOGRAPHOU CAMPUS city: ATHINA postcode: 15780 contact info Titolo: Ms. Nome: Georgia Cognome: Mertzelou Email: send email Telefono: +30 210 772 2033 Fax: +30 210 772 4181	EL (ATHINA)	hostInstitution	1˙703˙000.00
4	NATIONAL TECHNICAL UNIVERSITY OF ATHENS - NTUA  Organization address address: HEROON POLYTECHNIOU 9 ZOGRAPHOU CAMPUS city: ATHINA postcode: 15780 contact info Titolo: Prof. Nome: Ioannis Cognome: Dafalias Email: send email Telefono: +30 210 7721308 Fax: +30 210 772 1302	EL (ATHINA)	hostInstitution	1˙703˙000.00

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 Obiettivo del progetto (Objective)

'The theory of Critical State Soil Mechanics (CSSM) has become a paradigm within the framework of which elastoplastic soil constitutive models have been developed for the last 50 years. The present project will constructively challenge this paradigm from a missing fundamental perspective, namely the effect of soil fabric on the premises of CSSM.

The current CSSM postulates that at critical state the stress and void ratios reach critical values with no reference to orientational aspects of the soil fabric, such as particles long axes, contact normals or void vectors statistical orientations. Thus, several soil mechanical response characteristics associated with fabric anisotropy cannot be adequately or even correctly described within the existing theory. The hypothesis that an evolving soil fabric tensor must also acquire a critical value for critical state to occur will be investigated by theoretical, numerical and experimental means, including continuum and discrete elements methods (DEM) of analysis for cohesive and cohesionless soils, X-ray Computed Tomography studies on real soil samples, and triaxial, biaxial and hollow cylinder experiments. The results of this investigation will be used to propose a new enhanced CSSM theory with fabric playing a distinct role. Particular tasks will include the derivation of an objective rate equation of evolution of the fabric tensor, the formulation of classes of constitutive models for sands and clays within the new fabric-enhanced framework of CSSM, and the Finite Elements analysis of selected geomechanics boundary value problems illustrating the effect of soil fabric by comparing the results with and without fabric effects.

Successful completion of this project will change the way Soil Mechanics is taught at Universities and applied in advanced analysis of geomechanics problems, a field of increasing social impact in regards to hazard mitigations related to earthquakes and landslides.'