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11/13/2007 13:57 FAX <br />Project, Steve Adit Bulkhead, Sta. 2+65 By 1v EL/JFA Date 10/30/07 <br />10' Thick, 10' Wide, ].0' High, #6 Rebar Sheet 3 of 8 <br />z 013/018 <br />Bulkhead thickness (length) to resist concrete shear from static fluid load on upstream face: <br />Factored static fluid load on bullhead face, Fs 144•Ofs'p'hb•Wb Fs = 1048320 lb <br />1' s <br />Factored static fluid load/sq ft of face, wfs wr;; = 10483 psf <br />hb•wb <br />Concrete shear strength, IC; 2, fc fcs = 10.5 P S1 <br />Fs <br />Bulkhead thickness to resist factored shear load, Ls LS = 1.66 ft <br />2.(hb + wb) • 144•fc, <br />Plain concrete deep-beam bending stress design for static fluid load.on upstream face: <br />Deep-beam defined as Wb/Lt < 4 (ACl 318-02, Sec 10-7). <br />wb <br />- = 1.0 which is less than 4. Therefore, this is a deep beam for design. <br />Lt <br />Factored static fluid load on bulldlead face, := 144 k; p hb wb Fs = 1048320 lb <br />Uniform factored static fluid load on bulkhead, fs Fs f. = 10483 psf <br />hb • wb <br />2 <br />Nominal static fluid bending momeui, M„ := fS• wb 8 Mn = 131040 ft-lb <br />Mn <br />Factored static fluid bending moment, M„ Mu = 238255 ft-lb <br />Pc <br />144 • ?2 <br />Bulkhead section modulus, S = 2400 in' <br />6 <br />Concrete flexural (tensile) design suss, f I := 3 V `c <br />Mu Mu <br />as .= - ,U.- 2 <br />S IAA.I . <br />z'ji„:= fc i <br />M„ <br />LS` 24 0-5 <br />fcI = 164.3 psi <br />M„ <br />24•Lt2 <br />L,I = 7.77 ft