4.1 Article

Soil-structure interaction with time-dependent behaviour of both concrete and soil

Journal

Publisher

LATIN AMER J SOLIDS STRUCTURES
DOI: 10.1590/1679-78257081

Keywords

Soil; structure interaction; Time dependence; Concrete structures; Consolidation; Finite element method

Funding

  1. CAPES - Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior, Brazil [001]

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This paper introduces a model that considers the time-dependent behavior of both concrete and soil and allows for the coupled analysis of structure and foundation. Validation tests show considerable changes in the effects of soil-structure interaction when considering the time-dependent behavior of materials.
As the consideration of soil-structure interaction is increasingly being incorporated into design practice, there is a need for solutions that consider the most relevant aspects of the behaviour of both the concrete and the soil, some of which are time-dependent. The present work introduces a model that suits both the structure and the foundation ??? including the supporting soil ??? allowing the coupled analysis of hardening on cure, creep, shrinkage and cracking of concrete, and consolidation of soil. Both the structure and the foundation are modeled as one-dimensional finite elements. The time -dependent behaviour of the concrete and soil is modeled using Kelvin chains. For the structural elements, a mixed finite element formulation is used. Validation tests were conducted in the proposed modeling, comparing its results with available experimental and analytical data. The study of a reinforced concrete continuous beam supported by foundations on consolidating clay considering the time-dependent behaviour of the materials showed considerable changes in the effects of the soil-structure interaction.

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