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arXiv · 0803.1912

A Macro-Element for Dynamic Soil-Structure Interaction Analyses of Shallow Foundations

Charisis Chatzigogos·Alain Pecker·Jean Salençon
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Abstract

The scope of the paper is to present some aspects of the development of a "macro-element" for dynamic soil-structure interaction analyses of shallow foundations. Initially the concept of "macro-element" is introduced and is illustrated with the aid of a very simple example originating from structural engineering. Then the link is made with the modeling of the dynamic response of shallow foundations and the objectives and structure of such a tool are described with reference to the specific configuration of a circular footing resting on the surface of a heterogeneous purely cohesive soil. The principal features of the "macro-element" are then presented; the soil-structure interaction domain is reduced to a point that coincides with the center of the footing and all the (material and geometric) non-linearities are lumped at this point. A discussion on the most appropriate way to treat these non-linearities is undertaken based on experience gained with earlier works. It is suggested that the non-linearities be incorporated in the model within a unified formalism making use of the theory of multi-mechanism plasticity. Initial results concerning the definition of the ultimate surface for such a plasticity model, corresponding to the seismic bearing capacity of the foundation, are finally presented.

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BibTeXRIS

Charisis Chatzigogos, Alain Pecker, Jean Salençon. 2008-03-13. A Macro-Element for Dynamic Soil-Structure Interaction Analyses of Shallow Foundations. https://arxiv.org/abs/0803.1912

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