INFLUENCE OF FOUNDATION ROUGHNESS ON STRESSES AND DISPLACEMENTS UNDER FOUNDATIONS

Abstract

This investigation aims at evaluating the effect of foundation roughness on stresses and displacements inside the soilmass due to imposed axi-symmetrical loading with a nearly rigid foundation. The problem of rigid foundation has been simplified by assuming that the roughness at the foundation soil interface does not influence the distribution of normal contact stress. Using Hankel transforms, the mixed boundary problem has been reduced to the solution of duel integral equations. Numerical values for stresses and displacements have been obtained and compared with those of a smooth foundation. The effect of Poisson's ratio all stresses and displacements has been clearly demonstrated. It has been shown further that the surface settlement of the foundation, and the vertical stress inside the soil mass, are negligibly influenced by foundation roughness whereas the radial displacement and the radial stress are considerably influenced.