Numerical Investigation of the Bearing Capacity Factor and Behavior of Footing Bonded by a Wall

Abstract

This research presents a numerical study of a footing bounded by a concrete wall at one of its edges resting on sandy soil and subjected to axial static loading. The effect of wall depth (d/b) and distance from the edge (h/b) of footing were studied as a percentage of the footing width was changed several times, the optimum value was selected. Therefore the value of the bearing capacity factor Nγ for the optimum values of the ratio of (d/b and h/b) was obtained by changing the value of soil friction angle. The results show that the behavior of stress and strain in general is linear at low stress level, whereas stress increases, the strain generated increases, the strain is irregular under the foundation and that the value of the required stresses to generate strain increases with increasing depth below the foundation. Increasing the ratio of depth (d/b) leads to an increase in the value of the stresses required to generate the strain within soil as well as note when the ratio (d/b) exceeds (1/2) of no significant change occur in the value of stress and strain The presence of the wall at the edge of footing leads to a reduction in the strain generated within the soil by not less than (40%) and the optimum value of the ratio of (h/b) when the wall is linked to edge of the footing in other words (h/b=0). The bearing capacity factor (Nγ) for bounded footing increases with increasing the angle of internal friction of the soil.