Finite Element Analysis of Vane-Shaped Footing of Varying Projection Location using ANSYS

The load transferred to the soil strata has a tendency to move soil in vertical and horizontal directions and as a result settlements of foundation take place. Also when the footing is subjected to eccentric loading, it undergoes tilt. In the past researches, Angle Shaped Footings had been introduced to reduce the tilt up to zero. In Angle Shaped Footing, the footing is confined by providing vertical or inclined downward projection which remains embedded in soil. The concept of Angle Shaped Footing, which is found to be very useful in case of eccentric loading, was extended to Vane-Shaped footing. In Angle Shaped Footings, the vertical projection is provided at the edge while in Vane-Shaped footing, the vertical projection is provided at the centre and in both perpendicular directions. The vertical downward projection at centre is provided to improve the bearing capacity of soil against the application of central vertical loading which also provides considerable resistance against both overturning and sliding. Hence in the present work, different models of Vane-Shaped Footing have been analyzed with the change in the depth and location of vertical footing projection under the application of eccentric loading. The position of vertical projection is obtained for which tilt of footing becomes zero or brought within permissible limits of tilt as per Indian Standard Code. The deformations and stresses are also determined in both horizontal and vertical directions for different depths of projection under different eccentricities. The whole analysis has been performed over the ANSYS version 18.2.