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92_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

92_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 - Be7...

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General Shear Failure Bearing Capacity: Be7 o Form of Terzaghi equation essentially correct: bearing factors and extensions improved a Desirable to analyze deeper footings (Df > B), inclined loads, eccentric loads, sloped ground, and tilted footing base a Several important solutions available: Meyerhof (1963) - uses Ijf = (45 + $/2) and includes shear strength in soil above faotin ,incline and eccentric loads ansen (1970) -SImIlar a Meyerhof, adds slope and tilted base Vesic (1973) - similar to Hansen with modified inclination, slope, and tilt factors All three methods use same N, and N q , but have different Ny Do not mix the methods, compare if time & project dictate extra effort Meyerhof Bearing Capacity Equation: (for general shear failure) leg,,, (g, + gg + g,) = cN,Ae.1'<dAc; + gNgAg,I"",?,,; + y, yBNyA,.?",,?,J (q, due to c) (qq due to q) (q.( due to y) D, g y = ultimate bearing capacity
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