La modellazione dei fenomeni di interazione terreno-struttura mediante macroelementi: elastoplasticità vs. ipoplasticità

Abstract : In this work two different macroelements for shallow foundations, recently developed in the framework of the theories of hardening plasticity and hypoplasticity, have been considered to evaluate the effects of the soil-structure interaction for a reinforced concrete viaduct subject to earthquake loading. To this aim, the predictions of the dynamic behaviour of the viaduct obtained with the two macroelements – in terms of forces and displacements – have been compared with those obtained for the case of rigid soil. Despite the differences existing in the mathematical structure of the constitutive equations of the two macroelements, the analyses have shown very similar results, both in terms of structural loads and in terms of computed displacements and rotations of the foundations. In the ideal case study considered in this work, the soil-structure interaction reduces significantly the structural load and the ductility demand of the piers. The example presented shows that the two macroelements adopted may represent a significant step forward in the implementation of simple, robust and accurate computational tools for the soil-structure interaction analysis, both for research and geotechnical design.
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D. Salciarini, C. Tamagnini, Stéphane Grange, Panagiotis Kotronis. La modellazione dei fenomeni di interazione terreno-struttura mediante macroelementi: elastoplasticità vs. ipoplasticità. Rivista Italiana di Geotecnica, Associazione Geotecnica Italiana, 2010, 4, pp.9-28. ⟨hal-01007013⟩

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