Comptes Rendus
no. 11-12
A macro-element for a shallow foundation to simulate Soil–Structure Interaction considering uplift
[Un macro-élément d'Interaction Sol–Structure pour une fondation superficielle prenant en compte un mécanisme de décollement]

Présenté par : Jean Salençon

Stéphane Grange1  ; Panagiotis Kotronis1  ; Jacky Mazars1
1 Laboratoire 3S-R (Sols, Solides, Structures-Risques), INPG/UJF/CNRS, domaine universitaire, BP 53, 38041 Grenoble cedex 9, France
Comptes Rendus. Mécanique, Volume 336 (2008) no. 11-12, pp. 856-862.

Dans le domaine du génie parasismique, plusieurs méthodes existent pour considérer l'Interaction Sol–Structure : ce travail est basé sur le concept de « macro-élément ». La particularité du macro-élément réside dans le fait qu'il est formulé en variables globales (forces et déplacements) décrites au centre de la fondation. Le comportement non-linéaire du sol est reproduit selon la théorie de plasticité. Cette Note propose une amélioration d'un macro-élément existant dans la littérature par la prise en compte du décollement de la fondation selon la théorie de la plasticité. Des comparaisons avec des résultats expérimentaux d'une fondation soumise à des chargements cycliques montrent la performance de cette approche.

In earthquake engineering, several approaches exist to take into account Soil–Structure Interaction (SSI): the following work is based on the “macro-element” concept. The particularity of the macro-element lies in the fact that the movement of a foundation is entirely described by a system of generalised variables (forces and displacements) defined at the foundation centre. The non-linear behaviour of the soil is reproduced using the classical theory of plasticity. This Note improves an already existing macro-element by adding the uplift behaviour of the foundation according to the plasticity theory. Comparisons with experimental results of a foundation submitted to cyclic loadings show the performance of the approach.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crme.2008.10.002
Keywords: Soils, Soil–structure interaction, Uplift, Macro-element, Foundation, Plasticity
Mot clés : Sols, Interaction sol–structure, Décollement, Macro-element, Fondation, Plasticité
Stéphane Grange 1 ; Panagiotis Kotronis 1 ; Jacky Mazars 1

1 Laboratoire 3S-R (Sols, Solides, Structures-Risques), INPG/UJF/CNRS, domaine universitaire, BP 53, 38041 Grenoble cedex 9, France 
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Stéphane Grange; Panagiotis Kotronis; Jacky Mazars. A macro-element for a shallow foundation to simulate Soil–Structure Interaction considering uplift. Comptes Rendus. Mécanique, Volume 336 (2008) no. 11-12, pp. 856-862. doi : 10.1016/j.crme.2008.10.002. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2008.10.002/

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[2] F.C. Filippou, M. Constandines, FedeasLab getting started guide and simulations examples, Department of Civil and Environmental Engineering, UC, Berkeley, 2004

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[5] C. Crémer; A. Pecker; L. Davenne Modelling of non-linear dynamic behaviour of a shallow strip foundation with macro-element, Journal of Earthquake Engineering, Volume 6 (2002) no. 2, pp. 175-211

[6] R. Nova; L. Montrasio Settlements of shallow foundations on sand, Géotechnique, Volume 41 (1991) no. 2, pp. 243-256

[7] S. Grange; P. Kotronis; J. Mazars A macro-element for a circular foundation to simulate 3D soil–structure interaction, International Journal for Numerical and Analytical Methods in Geomechanics, Volume 32 (2008) no. 10, pp. 1205-1227

[8] A. Pecker Analytical formulae for the seismic bearing capacity of shallow strip foundations (Seco e Pinto, ed.), Seismic Behavior of Ground and Geotechnical Structures, Rotterdam, Balkema, 1997, pp. 261-268

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