Analytical derivation of friction parameters for FEM calculation of the state of stress in foundation structures on undermined territories

Abstract

When calculating the state of stress in a structure caused by relative strain of landscape which is a result of undermining, the structure is often deformed in order to create the specific situation. Each part of the structure resists the strain in a difference way. This depends on places where the structure is in contact with soil environment. When calculating the 3D foundation structures by means of the Finite Element Method (FEM), it is necessary to determine the soil environment resistance. For that purpose, most FEM software applications enable now to enter the friction parameters C1x and C1y. Unlike C1z which resists the structure in the direction perpendicular to the element’s plane, these parameters are applied in the central line plane of a slab and rod element.