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11/1`3/2007 13:56 FAQ x,006/018 <br />i <br />1 <br />Project, Pierce Adit Bulkhead, Sta. 3+04 By MV. /JFA Date 10/30/07 <br />.12' Thick, 12' Wide, 12' High, 46 Rebar_ Sheet 5 of 8 ? <br />Plain concrete deer)-beam bending stress design for earthquake acceleration; <br />Factored earthquake accelerated static fluid load, Efe := 144.0 fe•p• hl, wb Efe = 1132186 lb <br />Factored earthquake accelerated line-of=sight fluid load, E ?ea `Is' Yw'ht w? c? <br />fm = <br />6 <br />Efm = 790752 lb <br />?en-Lt'hb'wl?'7c'a <br />Factored earthquake accelerated bulkhead load, Ebm := <br />g <br />Ebm = 87307 lb <br />I <br />Total factored earthquake load on bulkhead, Ua := Efc + Efn, + Ebm UO. = 2010244 lb <br />Uniform factored earthquake load on bulkhead, u :_ U`, u = 13960 psf <br />hb' Wb <br />2 <br />Nominal earthquake bending moment, S':= U. Wb Mn = 251280 fi-lb <br />8 <br />Factored earthquake bending moment, \'14 := Mn -IVTu =156874 ft-lb <br />4)pc <br />144• Lt2 <br />Bulkhead section modulus, S S = 3456 i113 <br />6 <br />Concrete flexural (tensile) design stress, 5,:= 3 fcl 164.3 psi <br />Mu Mu M <br />- QS = u <br />S 144.1,1- Qy - <br />24L?c <br />6 <br />Mu <br />Qs fcl Lfc Lfc = 10.76 ft <br />24. QS