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Optimal Lower Bound Bearing Capacity of Strip Footings

ABSTRACT The paper deals with the prediction of lower bound bearing capacity of smooth (surface) and rough (embedded) strip footings based on finite elements and nonlinear programming. For embedded footings the influence of mesh pattern on the solution has been highlighted. The analysis is conducted for different values of the dimensionless parameter G(γB/2C) and ϕ values. The results so obtained are compared with the reported limit analysis, limit equilibrium and finite element solutions. For ϕ = 0 case the predictions using the present analysis are in very close agreement with the available solutions, but as ϕ increases the difference from the known solutions also increases.