3d Numerical Model in Nonlinear Analysis of the Interaction Between Subsoil and SFCR Slab

Abstract

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 Analysis of Subsoil-Reinforced Concrete Slab Interaction

“…The case of linear elastic inhomogeneous isotropic halfspace is to take into account of the heterogeneity of subsoil material. This choice allows a better description of subsoil behavior than the homogeneous one [17] and [18]. The 3D element, SOLID C3D8R, was selected to simulate the subsoil.…”

“…Numerical interaction model of reinforced concrete (RC) slab and subsoil was also modelled in ANSYS [16] with application of inhomogeneous half-space to get better subsoil behavior [17]. This model was also applied to simulate the interaction between subsoil and steel-fibre reinforced concrete slab in [18].…”