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Pierce Adit Bulkhead. As-Built <br />Project, Sta.2+84 By MEL/JFA Date 3/28/08 <br />12' Thick, 11'-7" Wide,11'-8" High, Sheet 5 of 8 <br />#6 Rebar <br />Plain concrete deer-beam bending stress design for earthquake acceleration: <br />Factored earthquake accelerated static fluid load, Efe := 144• ~fe' P' hb' ~'b Efe = 1063431 lb <br />• <br />• <br />~ea' S ls''Y w' ht • wt • o< <br />Factored earthquake accelerated line-of-sight fluid load, Efm ~_ <br />g <br />lb <br />Efm = 940392 <br />Factored earthquake accelerated bulkhead load, Eb,,, :_ ~ea' 1-r hb' mo'b' ^Ic' a. <br />g <br />Ebm = 82005 lb <br />Total factored earthquake load on bulkhead, Ua := Efe +Efm +Ebm Ua = 2085828 lb <br />U <br />Uniform factored earthquake load on bulkhead, u := a u = 15421 psf <br />hb • wb <br />2 <br />w <br />Nominal earthquake bending moment, M~:= u• b Mn = 258941 ft-lb <br />8 <br />M <br />Factored earthquake bending moment, ~M ~, := p M„ = 470802 ft-lb <br />~pc <br />144• I.~2 <br />Bulkhead section modulus, ~5~,:= S = 3456 in3 <br />6 <br />Concrete flexural (tensile) design stress, f~:= 3~ <br />Mu _ M„ <br />Qs <br />"~` • S 144.1-fc <br />6 <br />M„ <br />Qs := fcl Lfc :_ <br />24.6s <br />fcl = 219 psi <br />Mu <br />Qs := 24.1-.fc <br />1-fc = 9.46 ft <br />