Unformatted text preview: 3) Check the adequacy of the design if a factored axial load of 350 kips is applied at an eccentricity e x = 5 in. and e y = 8 in. Use both Bresler’s reciprocal load method and the load contour method (using β charts given in class). For determining the nominal PM diagrams, you are required to use Whitney’s stress block. For the yield diagram, you should model the compression zone using Hognestad’s parabola with a linear descending tail. Use k 3 = 0.85 and Z = 100. Material properties: Concrete: f’ c = 5000 psi; ε co = 0.002; Steel: f y = 60 ksi; E = 29,000 ksi 18” 24” 12 #7 bars #4 ties @ 6in. 21.5” 6” 2.5” x x y y 2.5” 4”...
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 Winter '09
 parra
 @, Euclidean geometry, 7 bars, 350 kips, University of Michigan Department of Civil and Environmental Engineering

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