ULTIMATE BEARING CAPACITY OF FOOTING ON SANDY SOIL AGAINST COMBINED LOAD OF VERTICAL, HORIZONTAL AND MOMENT LOADS

Abstract

Rigid plastic finite element method employing the rigid plastic constitutive equation, which considers non-linear shear strength properties against confining pressure, is used for the assessment of ultimate bearing capacity of footing on sandy soils against the combined load of vertical, horizontal and moment loads. The numerical results were compared with the results predicted by semi-empirical bearing capacity formulate of Architectural Institute of Japan and others. The comparison is conducted in terms of vertical and horizontal loads plane and vertical and moment loads plane. The limit load is expressed in normalization form by the limit vertical load, Vo. Results show that the normalized vertical load decreases with the increase in the normalized horizontal load and/or moment load. Effect of non-linear shear strength on the normalized limit load space in vertical, horizontal and moment loads is clearly indicated. The normalized horizontal load is obtained greater than that of linear shear strength property.