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On soil-structure interaction models to simulate free vibrations and behavior under seismic loads of a RC building supported by a particular shallow foundation

  • Soelarso Soelarso (Laboratoire Avenues, Universite de Technologie de Compiegne, Alliance Sorbonne Universite) ;
  • Jean-Louis Batoz (Laboratoire Roberval, Universite de Technologie de Compiegne, Alliance Sorbonne Universite) ;
  • Eduard Antaluca (Laboratoire Avenues, Universite de Technologie de Compiegne, Alliance Sorbonne Universite) ;
  • Fabien Lamarque (Laboratoire Avenues, Universite de Technologie de Compiegne, Alliance Sorbonne Universite)
  • Received : 2023.04.01
  • Accepted : 2023.07.21
  • Published : 2023.10.25

Abstract

The paper deals with the finite element modelling of the free vibration and structural behavior of a particular four-floor reinforced concrete structure subjected to static equivalent seismic loads and supported by a shallow foundation system called SNSF (Spider Net System Footing). The two FE models are a simple 2D Matlab model and a detailed 3D model based on solid elastic elements using Altairworks (Hypermesh and Optistruct). Both models can simulate the soil structure interaction. We concentrate on the behavior of a representative cell involving two columns on five levels. The influence of the boundary conditions on the external vertical planes of the domain are duly studied. The Matlab model appears relevant for a primary estimation of frequencies and stiffness of the whole structure under vertical and lateral loads.

Keywords

Acknowledgement

The scholarship to the first author, provided by the Islamic Bank of Development during the project "UNTIRTA food security" is duly acknowledged.

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