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Steve Adit Bulkhead, As-Built g MEL/JFA Date 3/28/08 <br />Project, Sta. 2+65 Y <br />10' Thick, 7'-7" Wide, 8'-2" High, Sheet 5 of 8 <br />#6 Rebar <br />Plain concrete deep-beam bending stress design for earthquake acceleration: <br />Factored earthquake accelerated static fluid load, Efe := 144•~fe'p'hb'~'~'b Efe = 487371 lb <br />Factored earthquake accelerated line-of--sight fluid load, Efi„ :_ ~ea'Sls''Yw'ht'~'~'t'a. <br />g <br />Efm = 362387 lb <br />Factored earthquake accelerated bulkhead load, Ebm :_ ~ea' Lt' hb' mo'b' ^'! c' oc <br />g <br />Ebm = 31319 lb <br />Total factored earthquake load on bulkhead, Ua := Efe + E fm +Ebm Ua = 881077 lb <br />i U <br />Uniform factored earthquake load on bulkhead, a := a u = 14214 psf <br />hb • ~'b <br />2 <br />w <br />Nominal earthquake bending moment, M~:= u• b Mn = 102354 ft-lb <br />8 <br />M <br />Factored earthquake bending moment, M,:= a M„ = 186097 ft-lb <br />~pc <br />144• I,t2 <br />Bulkhead section modulus, ,5~,:= S = 2400 in3 <br />6 <br />Concrete flexural (tensile) design stress, f~:= 3 <br />M„ M„ <br />^6&` • S QS • 144• Lfc <br />6 <br />Mu <br />6S := foi Lfo ~= 24 6S <br />fc~ = 239.8 psi <br />Mu <br />6S := 24 Lfc <br />L,~c = 5.69 ft <br />