نوع مقاله : پژوهشی
1 دانشکدهی مهندسی عمران، دانشگاه صنعتی خواجه نصیرالدین طوسی
2 دانشکده مهندسی - دانشگاه خوارزمی
عنوان مقاله [English]
The presence of a void under a foundation can affect the foundation's bearing capacity, significantly. Experimental programs or field tests are very expensive and access to all information and performed tests under various conditions is not easy. To study the effect of the underground voids, the accomplishment of a suitable numerical analysis on a physical model is necessary. As the finite element method for investigation of many geomechanic problems has been used successfully, a series of finite element analyses under vertical statically loading conditions were performed on a prototype soil-void model, using a two-dimensional plane strain model. The effect of the embedment depth of the void and the eccentricity of footing against the void were investigated. A close agreement between experimental and numerical results is observed. The results indicate that there is a critical region under the footing; when the void is located within this region, the stability and bearing capacity of the footing is significantly affected by the presence of the void and the magnitude of this effect must be considered.