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Theses

Comportement sismique des fondations superficielles: vers la prise en compte d'un critere de performance dans la conception

Abstract : The objective of this thesis is to contribute to the study of shallow foundations under seismic excitation and to offer new tools for the treatment of related problems in engineering practice, with a particular focus on performance-based design. The undertaken research was organized following four axes of approach:
a. Identification of the main characteristics of the problem by examining real foundation seismic failure. This effort led to the creation of a database of approximately 200 structures of all types that suffered a seismic failure at the foundation level.
b. Theoretical approach for the determination of the seismic bearing capacity of shallow foundations. The problem of a circular footing on a heterogeneous purely cohesive soil was treated with the kinematic approach of the Yield Design theory. The established solutions suggest a significant extension of the design procedures incorporated in the European earthquake-resistant design norms by introducing three-dimensional footing geometry and soil heterogeneity.
c. Experimental approach for the validation of the established theoretical results. A project with the French Central Laboratory of Bridges and Highways (Laboratoire Central des Ponts et Chaussées) was undertaken, focusing on the determination of the bearing capacity of the configuration treated in the theoretical approach through centrifuge tests.
d. Development of a tool for efficient non-linear dynamic soil-structure interaction analyses. A new macroelement model has been developed comprising two coupled non-linear mechanisms: the irreversible soil behaviour via a bounding surface hypoplastic model and the uplift that may take place in the soil-foundation interface via a phenomenological non-linear elastic model.
The perspective of these contributions is to enrich the existing design norms by orienting them towards the promising performance-based design philosophy.
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Contributor : Charisis Chatzigogos <>
Submitted on : Tuesday, January 22, 2008 - 4:30:51 PM
Last modification on : Friday, October 23, 2020 - 4:59:18 PM
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  • HAL Id : tel-00212279, version 1

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Charisis Chatzigogos. Comportement sismique des fondations superficielles: vers la prise en compte d'un critere de performance dans la conception. Sciences de l'ingénieur [physics]. Ecole Polytechnique X, 2007. Français. ⟨tel-00212279⟩

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