ULTIMATE BEARING CAPACITY OF SHALLOW FOUNDATIONS UNDER INCLINED AND ECCENTRIC LOADS .1. PURELY COHESIVE SOIL

The problem of determining the bearing capacity of a strip footing res ting on the surface of a homogeneous half space and subjected to an in clined, eccentric load is solved within the framework of the yield des ign theory, assuming the soil to be purely cohesive according to Tresc a's strength criterion. The soil foundation interface is also purely c ohesive, in terms of the homologous strength criterion. Both the stati c and kinematic approaches of the yield design theory are used to deri ve lower and upper bounds for the ultimate bearing capacity. For an in clined centered load, an almost exact solution is derived; for increas ing values of the load eccentricities, the ultimate bearing capacity c an only be bracketed but nevertheless determined within a sufficient d egree of accuracy from an engineering standpoint. In a companion paper , the same problem is solved for a soil and an interface with a tensio n cut-off. These two solutions represent extreme conditions for the te nsile resistance of the purely cohesive soil and could be used to brac ket the variations of the bearing capacity as a function of the soil t ensile strength.