INTERACTION OF NONLINEAR NUMERICAL MODEL OF SFRC SLAB AND NONLINEAR NUMERICAL SUBSOIL MODEL

Abstract

Experimental measurements of the concrete slab in interaction with subsoil are compared with
numerical analysis based on Finite Element Method FEM. Experimental measurements are conducted with using
an experimental device constructed at the Faculty of Civil Engineering VSB – Technical University of Ostrava. In
the article, several types of nonlinearities enter into FEM analysis. Subsoil-structure interaction requires an
iterative solution procedure - and therefore structural nonlinearity. Material nonlinearity was used in the numerical
model of the slab. This model also allows the creation and development of cracks in concrete - similar as during
the experimental load test. Material nonlinearity was also used in the numerical model subsoil - to ensure of
apposite subsoil behavior. The purpose of this paper is to compare resulting deformation of the slab with values
observed during experimental loading test. It was concluded that the good agreement between the experimental
results and numerical simulation was observed.