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B- Level/Brenneman Bulk..,,ad Design <br />Latite shear on B- Level/Brenneman Bulkhead perimeter: <br />f'r z 265 psi (minimum cohesion from physical test results) <br />L = WV — (1.4)30(9)9 _ <0.36 ft <br />[2(h + e)f'r ] [2(9 + 9)265 <br />W = WV = (1.4)30(9)9(144) = 490000 lb <br />_ W _ 490000 <br />v' _ {2(h + £)]L(144) [2(9 + 9) 3(144) — 31.5 psi <br />FS > 265 .. 8.41 <br />31.5 <br />Plain concrete deep -beam bending stress design, B- Level/Brenneman Bulkheads (ACI 318R -92, <br />Sec 9.9.2.5, 18.4.1(b), & ACI 318 -71, Sec 9.2.1.5) <br />w = U = 0p(144) = 1.4(30)144 = 6050 ft <br />we 6050(9 <br />M n = 8 — 8 — 61300 ft • lb <br />Mu = M — 61300 — 94300 ft • lb <br />0.65 0.65 <br />bL 1 (L 3 )( 123 ) <br />S = I = 12 = 12 _ 144L <br />c L L(12) 6 <br />2 2 <br />f'c, = 3 f = 3 2500 = 150 psi <br />Mc M 94300 3930 <br />f'c,= 150 = u — u = — — <br />I S 144L L <br />L - 150 5.lft <br />6 <br />Page 3 February 21, 1994 <br />.'. 3 -ft long bulkhead must be reinforced <br />