03-11-2014, 12:36 PM
Abstracts: The effect of interference of two closely spaced strip footing placed on surface of sand was investigated by using finite element method. The foundation soil was assumed as perfectly plastic material obeying the Mohr’s coulomb failure criterion. The ultimate bearing capacity of footing in interference decreases with increase in spacing. At larger spacing , the effect of interference varishes. The eccentric loading towards the interference gone affects the ultimate bearing capacity of footing during interference .The loads are chosen such that the failure stage of footings are clearly observed. The interference effect on the settlement is quite significant. The settlement of interfering footings in the range of working load decreases with increase in the clear spacing between the footings. The results have also shown that for smaller eccentricities, design according to Euro code 7 (CEN 2004) and other similar methods provides bearing capacities, which in general although being slightly smaller are in good agreement with the lower-bound values. There is no significant alteration in ultimate bearing capacity of eccentric loaded footing during interference.