FINITE ELEMENT COMPUTATION OF THE BEHAVIORAL MODEL OF MAT FOUNDATION

In this work the influence of soil mechanical properties on the displacements of mat foundation is studied. It was introduced the soil-structure interaction that is modeled by two parameters, the modulus of subgrade vertical reaction (k) and the modulus of subgrade horizontal reaction (2T). These two parameters are dependent on the geometrical and mechanical characteristics of the system. It appears from this study that the modulus of vertical subgrade reaction is not an intrinsic characteristic but depends on the parameters of the soil and the concrete (Es νs, Eb and νb) and the dimensions of the plate (so dependent on the superstructure). It is clear from this analysis that the foundation soil parameters are more influential than those of the plate.