88_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

88_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 - BC3...

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BC3 a o =:; e(O.75n-O/2)l3fl 9 ¢:I ($ in radians) bearing factors: ,,~~ :1" (.~p.": q. 't"" lor local shear failure: Terzaghi Bearing Capacity Equation: (basically conservative) Q for genera/shear failure: ~= D f ~Df strip: "= Oc D,yJil;±-0~5"i6N' ~ square: 9"-1.3cN,'fD,yN.+OA'jBN, I' 'I Soil: B circular: " - 1.3cN, T EJ J Y!::l, of 0.3 'Y8N, ~, c, $ , N = a o , 2cos'(45+$/2) N -1 2(N. +1)tan$ N =-'-,N,=5.70for$=0 N y = (Coduta) , tan$ 1+0.4sin(4$) (rigorous calculation for Ny in chart below o,~ablecOrrne&Qage ) strip: square: circular: where: q" = 1.0cN',+D,~N', +0.5yBN', q" = 1.3cN', +D,~N', +O.4yBN', q" = 1.3cN', +D,yN', +0.3yBN', C' (21') C and
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