عنوان مقاله [English]
The bearing capacity of finite foundations located on slopes that are convex in plan is investigated by three-dimensional models. In this study, we utilized a powerful finite element software, using the Mohr Coulomb constitutive model, in three dimensions, to obtain practical results for the bearing capacity of foundations located on slopes that are convex in plan. The results show that with an increase in the radius of curvature of the convex slopes, the bearing capacity of square foundations located on them also increases. The results are displayed in the form of practical charts for engineer usage. These plots can be utilized for practical purposes by estimating the bearing capacity of equivalent foundations located on straight slopes from limit equilibrium, or finite element codes that are used in soil mechanics, for example, Plaxis software. Although the effect of the radius of curvature on the bearing capacity of foundations is lower than other parameters. When other parameters are obtained with a good degree of precision, these results could be used complementarily for achieving comprehensive results for practical purposes in civil engineering projects. Because Abaqus is a very powerful code that can be used for soil materials, we can trust its calculated results. As the Abaqus code has very advanced techniques for mesh generation, for obtaining results with the most precision, the mesh is generated very carefully with finer elements near the foundation and coarser elements in locations far from the foundation. The primary purpose for generating such mesh is calculation of the bearing capacity of foundations. Not only are the results affected by the radius of curvature of the slope, they also depend on other parameters, like the friction angle of sandy soil, and distance of the foundation from the crest of the slope. Therefore, we studied these parameters in addition to the radius vature of the slopes.