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Numerical Simulation of the Interaction between Fibre Concrete Slab and Subsoil—The Impact of Selected Determining Factors

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  • Lukas Duris

    (Department of Geotechnics and Underground Engineering, Faculty of Civil Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava-Poruba, Czech Republic)

  • Eva Hrubesova

    (Department of Geotechnics and Underground Engineering, Faculty of Civil Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava-Poruba, Czech Republic)

Abstract

Shape and material optimization of building structures, including reducing the amount of concrete used, are very important aspects in sustainable construction. Numerical modelling is currently used very effectively to design optimized and sustainable structures, including their interaction with the surrounding rock environment. This paper is focused on the three selected factors of numerical modelling of fibre concrete slab and subsoil interaction: (1) the constitutive model of fibre concrete slab, (2) deformational and strength characteristics of subsoil, (3) effect of interface elements. The specialized geotechnical software Midas GTS NX, based on the finite element method, was used for the modelling of this task. Numerical results were compared with the experimental measurement of vertical displacements on the upper surface of slab. In the presented study, three constitutive models of slab recommended in MIDAS GTS NX code for modelling concrete behaviour (elastic, Mohr-Coulomb and Drucker-Prager) were applied. In addition, the sensitivity analysis with respect to the deformational and strength characteristics of subsoil was performed. The numerical study also presents the effect of the interface elements application on the slab behaviour. The numerical results of maximum vertical displacements based on the Drucker-Prager and elastic model underestimated both the experimental results and numerical results based on the Mohr-Coulomb model. From the qualitative point of view (shape of deflection curve), the numerical simulation showed the better agreement of the Mohr-Coulomb constitutive model with the experimental measurements in comparison with the other two investigated constitutive models. The performed parametric study documented that reduction of the strength and deformational characteristics of subsoil leads to the increase of maximum vertical displacements in the centre of slab, but the experimentally measured deflection curve, including uplift of slab and gapping occurrence between the slab and subsoil, was not achieved without the interface application.

Suggested Citation

  • Lukas Duris & Eva Hrubesova, 2020. "Numerical Simulation of the Interaction between Fibre Concrete Slab and Subsoil—The Impact of Selected Determining Factors," Sustainability, MDPI, vol. 12(23), pages 1-17, December.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:23:p:10036-:d:454455
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    References listed on IDEAS

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    1. Radim Cajka & Zuzana Marcalikova & Marie Kozielova & Pavlina Mateckova & Oldrich Sucharda, 2020. "Experiments on Fiber Concrete Foundation Slabs in Interaction with the Subsoil," Sustainability, MDPI, vol. 12(9), pages 1-21, May.
    2. Eva Hrubesova & Marek Mohyla & Hynek Lahuta & Tuan Quang Bui & Phi Dinh Nguyen, 2018. "Experimental Analysis of Stresses in Subsoil below a Rectangular Fiber Concrete Slab †," Sustainability, MDPI, vol. 10(7), pages 1-12, June.
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    Cited by:

    1. Jiri Brozovsky & Radim Cajka & Zdenka Neuwirthova, 2021. "Parallel Code Execution as a Tool for Enhancement of the Sustainable Design of Foundation Structures," Sustainability, MDPI, vol. 13(3), pages 1-12, January.

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    2. Radim Cajka & Zuzana Marcalikova & Vlastimil Bilek & Oldrich Sucharda, 2020. "Numerical Modeling and Analysis of Concrete Slabs in Interaction with Subsoil," Sustainability, MDPI, vol. 12(23), pages 1-22, November.
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