Analysis of Angle Shaped Footing under Eccentric Loading

Footings are often subjected to eccentric loading due to (1) moments with or without axial forces; (2) the oblique loading; and (3) their location near the property line. Due to eccentric loading, the footing tilts and the pressure below the footing does not remain uniform. The tilt of footing increases with an increase in the eccentricity and the bearing capacity reduces considerably. Therefore, footing sizes increase and make the design uneconomical. The finite-element analysis of an angle shaped footing under eccentric loading has been carried out in the present study. One side vertical projection of footing confines the soil and prevents its lateral movement. It was concluded that footing subjected to uniaxial eccentric loads can be designed for no or negligible tilt by giving the footing an angle shape. The depth of footing projection will depend upon the eccentricity width ratio.