Numerical modelling of soil-structure interaction problems in civil engineering usually require relatively large finite element models. In the paper the modelling of fibre-reinforced concrete foundation slab on soil is discussed. Commercially available finite element code ANSYS is used.

The problem was computed with the use of the Czech IT4Innovations supercomputers. The used modelling and computing approaches with their influence on the obtained results and on the time of the computation are discussed.

There are many possible approaches for modelling of fibre-reinforced concrete. The fibres were modelled as discrete beams which were pseudo-randomly distributed inside the concrete. The fibres were considered to be elasto-plastic. The concrete was also modelled with as elastoplastic material represented by the Willam-Warnke model.

The soil under the slab was modelled in 3D with respect to different layers of soils and rock. These materials were modelled initially as a linear elastic ones and then with the use of Drucker-Prager elasto-plastic model. The contact interface between the slab and the soil was modelled in two alternative ways. The first one was an ideal connection between the materials and the second was an imperfect connection modelled with the use of contact finite elements.

Results of the computations are provided and reference to results of in situ experimental works are given.

The size of the problem required the use of a parallel supercomputer. Thus the paper also includes comparison of computational times for used configurations of computational resources to give full information of the recommended numerical model and computational resources for this particular problem.

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