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Détail de l'auteur
Auteur S. Gourvenec
Documents disponibles écrits par cet auteur
Affiner la rechercheCentrifuge study of capacity of a skirted foundation under eccentric transient and sustained uplift / H. E. Acosta-Martinez in Géotechnique, Vol. 62 N° 4 (Avril 2012)
[article]
in Géotechnique > Vol. 62 N° 4 (Avril 2012) . - pp. 317–328
Titre : Centrifuge study of capacity of a skirted foundation under eccentric transient and sustained uplift Type de document : texte imprimé Auteurs : H. E. Acosta-Martinez, Auteur ; S. Gourvenec, Auteur ; M. F. Randolph, Auteur Année de publication : 2012 Article en page(s) : pp. 317–328 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Bearing capacity Clays Foundations Model tests Offshore engineering Pore pressures Time dependence Résumé : Environmental and buoyancy forces impart overturning moments and potentially direct uplift to offshore foundation systems. Shallow skirted foundations are an attractive design solution, as negative excess pore pressures developed within the soil plug provide temporary uplift resistance. This paper presents the results of beam centrifuge tests on a shallow skirted foundation in a lightly overconsolidated clay under eccentric transient and sustained uplift. When compared with the response under concentric uplift, the experimental results show a reduction in capacity and an increase in the rate of degradation of capacity under sustained loading. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/issue/geot/62/4# [article] Centrifuge study of capacity of a skirted foundation under eccentric transient and sustained uplift [texte imprimé] / H. E. Acosta-Martinez, Auteur ; S. Gourvenec, Auteur ; M. F. Randolph, Auteur . - 2012 . - pp. 317–328.
Génie Civil
Langues : Anglais (eng)
in Géotechnique > Vol. 62 N° 4 (Avril 2012) . - pp. 317–328
Mots-clés : Bearing capacity Clays Foundations Model tests Offshore engineering Pore pressures Time dependence Résumé : Environmental and buoyancy forces impart overturning moments and potentially direct uplift to offshore foundation systems. Shallow skirted foundations are an attractive design solution, as negative excess pore pressures developed within the soil plug provide temporary uplift resistance. This paper presents the results of beam centrifuge tests on a shallow skirted foundation in a lightly overconsolidated clay under eccentric transient and sustained uplift. When compared with the response under concentric uplift, the experimental results show a reduction in capacity and an increase in the rate of degradation of capacity under sustained loading. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/issue/geot/62/4# A centrifuge study on the effect of embedment on the drained response of shallow foundations under combined loading / L. Govoni in Géotechnique, Vol. 61 N° 12 (Décembre 2011)
[article]
in Géotechnique > Vol. 61 N° 12 (Décembre 2011) . - pp. 1055–1068
Titre : A centrifuge study on the effect of embedment on the drained response of shallow foundations under combined loading Type de document : texte imprimé Auteurs : L. Govoni, Auteur ; S. Gourvenec, Auteur ; G. Gottardi, Auteur Année de publication : 2012 Article en page(s) : pp. 1055–1068 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Bearing capacity Footings/foundations Centrifuge modelling Plasticity Settlement Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Drum centrifuge tests with surface and buried circular footings on medium dense silica sand subjected to planar combined loading are reported. The experimental work specifically addresses the effect of the footing embedment within a work-hardening plasticity approach, which to date has been used predominantly for interpretation of the behaviour of small-scale models of surface foundations. Vertical loading and swipe tests were carried out, and results are compared with existing data from similar studies on small-scale 1g foundation models. The overall trend of the centrifuge results confirms the general framework, suggesting that a work-hardening plasticity approach in terms of force-resultant modelling for the soil–footing system (the so-called ‘macro-element') applies under properly scaled stress conditions. The data also indicate that the traditional assumption of a yield surface, isotropically expanding with increasing vertical penetration is not suitable for an embedded foundation. An enhancement of the existing yield surface formulation enables generalisation of the existing work-hardening models from surface to embedded footings.
DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.7.00109 [article] A centrifuge study on the effect of embedment on the drained response of shallow foundations under combined loading [texte imprimé] / L. Govoni, Auteur ; S. Gourvenec, Auteur ; G. Gottardi, Auteur . - 2012 . - pp. 1055–1068.
Génie Civil
Langues : Anglais (eng)
in Géotechnique > Vol. 61 N° 12 (Décembre 2011) . - pp. 1055–1068
Mots-clés : Bearing capacity Footings/foundations Centrifuge modelling Plasticity Settlement Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Drum centrifuge tests with surface and buried circular footings on medium dense silica sand subjected to planar combined loading are reported. The experimental work specifically addresses the effect of the footing embedment within a work-hardening plasticity approach, which to date has been used predominantly for interpretation of the behaviour of small-scale models of surface foundations. Vertical loading and swipe tests were carried out, and results are compared with existing data from similar studies on small-scale 1g foundation models. The overall trend of the centrifuge results confirms the general framework, suggesting that a work-hardening plasticity approach in terms of force-resultant modelling for the soil–footing system (the so-called ‘macro-element') applies under properly scaled stress conditions. The data also indicate that the traditional assumption of a yield surface, isotropically expanding with increasing vertical penetration is not suitable for an embedded foundation. An enhancement of the existing yield surface formulation enables generalisation of the existing work-hardening models from surface to embedded footings.
DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.7.00109 Undrained failure envelope for skirted foundations under general loading / S. Gourvenec in Géotechnique, Vol. 61 N° 3 (Mars 2011)
[article]
in Géotechnique > Vol. 61 N° 3 (Mars 2011) . - pp. 263–270
Titre : Undrained failure envelope for skirted foundations under general loading Type de document : texte imprimé Auteurs : S. Gourvenec, Auteur ; S. Barnett, Auteur Année de publication : 2011 Article en page(s) : pp. 263–270 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Numerical modelling Bearing capacity Footings/Foundations Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Three-dimensional failure envelopes can be used to define the bearing capacity and proximity to failure of shallow foundations under general vertical, horizontal and moment loading (V, H, M/B). Different structures, and different load cases for the same structure, cover varying domains of (±V, ±H, ±M/B) load space; therefore, a fully encompassing failure envelope in (V, H, M/B) load space is a useful tool to define ultimate limit states for design. In this technical note, a closed-form expression is proposed that enables prediction of undrained bearing capacity of skirted foundations under general in-plane loading, valid for a range of embedment ratios and soil shear strength heterogeneities.
DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.t.027 [article] Undrained failure envelope for skirted foundations under general loading [texte imprimé] / S. Gourvenec, Auteur ; S. Barnett, Auteur . - 2011 . - pp. 263–270.
Génie Civil
Langues : Anglais (eng)
in Géotechnique > Vol. 61 N° 3 (Mars 2011) . - pp. 263–270
Mots-clés : Numerical modelling Bearing capacity Footings/Foundations Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Three-dimensional failure envelopes can be used to define the bearing capacity and proximity to failure of shallow foundations under general vertical, horizontal and moment loading (V, H, M/B). Different structures, and different load cases for the same structure, cover varying domains of (±V, ±H, ±M/B) load space; therefore, a fully encompassing failure envelope in (V, H, M/B) load space is a useful tool to define ultimate limit states for design. In this technical note, a closed-form expression is proposed that enables prediction of undrained bearing capacity of skirted foundations under general in-plane loading, valid for a range of embedment ratios and soil shear strength heterogeneities.
DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.t.027