Jana Labudková

Numerical solution of soil - foundation interaction and comparison of results with experimetal measurements

Several experimental measurements of reinforced concrete slab - subsoil interaction are compared with numerical analysis of shallow foundation by means of FEM. At the Faculty of Civil Engineering VSB - Technical University of Ostrava testing device was constructed so that the phenomena of soil - foundation interaction could be experimentally investigated and compared with numerical models. Results of experimental loading test are compared with soil - foundation interaction analysis based on finite element method (FEM). The purpose of this paper is to compare resulting deformation of the slab, subsidence of the subsoil, bending moments and contact stress calculated by different software based on FEM. Currently there are several software that, can deal with the interaction of foundations and subsoil.

EXPERIMETAL MEASUREMENT OF SOIL-PRESTRESSED FOUNDATION INTERACTION

Several experimental measurements of reinforced concrete slab - subsoil interaction are compared with numerical analysis of shallow foundation by means of FEM. At the Faculty of Civil Engineering VSB - Technical University of Ostrava testing device was constructed so that the phenomena of soil - foundation interaction could be experimentally investigated and compared with numerical models. The experimental model was designed as a cutout of prestressed foundation slab-on-ground and the static load test was conceived as a simulation of local loading of a square shape column. During the static load test, measurements focused on observation of horizontal deformations, tension inside the slab and on the contact surface between foundation structure and subsoil. The described static load test was part of a series of experiments realized at the Faculty of Civil Engineering, VSB -Technical university of Ostrava.

3D NUMERICAL MODEL IN NONLINEAR ANALYSIS OF THE INTERACTION BETWEEN SUBSOIL AND SFCR SLAB

For decades attention has been paid to interaction of foundation structures and subsoil and, in turn, to development of interaction models. Complexity of a static solution is given mainly by selection of a computational model, effects of physical-nonlinear behaviour of such structure and co-effects of the upper structure and the foundation structure. ). Input data for numerical analysis were observed experimental loading test of steel-fibre reinforced concrete slab. The loading was performed using unique experimental equipment which was constructed in the area Faculty of Civil Engineering, VŠB-TU Ostrava. Homogeneous half-space this takes no account and calculated settlement is strongly dependent on the size of the subsoil model, as parametric study demonstrated. The modulus of deformability changes continuously, depending on the depth, in the inhomogeneous half-space. Values calculated by 3D numerical model were compared with values measured during the loading test of steel-fibre concrete slab.

Numerical analyses of interaction of steel-fibre reinforced concrete slab model with subsoil

Numerical analyses of contact task were made with FEM. The test sample for the task was a steel-fibre reinforced concrete foundation slab model loaded during experimental loading test. Application of inhomogeneous half-space was used in FEM analyses. Results of FEM analyses were also confronted with the values measured during the experiment.

Comparison of Experimentally Measured Deformation of the Plate on the Subsoil and the Results of 3D Numerical Model

Abstract The purpose of this paper is to compare the measured subsidence of the foundation in experiments and subsidence obtained from FEM calculations. When using 3D elements for creation of a 3D model, it is, in particular, essential to choose correctly the size of the modelled area which represents the subsoil, the boundary conditions and the size of the finite element network. The parametric study evaluates impacts of those parameters on final deformation. The parametric study is conducted of 168 variant models.