Abstract
AbstractBy using the method of characteristics, the effect of footing–soil interface friction angle (δ) on the bearing capacity factor Nγ was computed for a strip footing. The analysis was performed by employing a curved trapped wedge under the footing base; this wedge joins the footing base at a distance Bt from the footing edge. For a given footing width (B), the value of Bt increases continuously with a decrease in δ. For δ=0, no trapped wedge exists below the footing base, that is, Bt/B=0.5. On the contrary, with δ=ϕ, the point of emergence of the trapped wedge approaches toward the footing edge with an increase in ϕ. The magnitude of Nγ increases substantially with an increase in δ/ϕ. The maximum depth of the plastic zone becomes higher for greater values of δ/ϕ. The results from the present analysis were found to compare well with those reported in the literature. Copyright © 2008 John Wiley & Sons, Ltd.
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