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I I/ Id/GV v 1 Iu.:Jr rhA <br />tkjV14/VIn <br />Project, Steve Adit Bulkhead, Sta. 2+65 By YlLL/J1+A Date 10/30/07 <br />10' Thick, 10' Wide, 10 High, #6 Rebar <br />Sh:cet . 4_ _ of 8 <br />Reinforced concrete deep-beam bending stress design for static fluid load on upstrcam face <br />C = ?,J b,,,a = 0.85(3000)12a = 30600a <br />C=T <br />30600a = 60000As <br />Factored static fluid bending moment, <br />T = Asfy = 60000As <br />a = (60000 A.;)/30600 = 1.961 A, <br />Mn M,, = 145600 ft-lb <br />' ?rc <br />Muin 12-Mu Muin = 1747200 in-lb <br />Maximum concrete rebar cover, d := 12-Lc - m, d = 116.500 in <br />Mu = ASfc(d-a/2) = 60000As(116.5 - 1.961 A,J2) = 60000 A,d - 58830 Ale <br />58830 As2 - 60000 Asd + Mein = 0 C1 := 58830 C2 := •-60000-d C3 Mum <br />-C2 - C2 2 - 4-C? ?C3 <br />AS '= AS - 0.25 inz <br />2-CI <br />One cage of 96 bars (0.44 in2 per bar, 0.750-in nominal diameter, 1.502 lb/ft) on 12.00-in c-c <br />(11.25-in between bars) provides 0.44 inz/ft of steel area. <br />Therefore, A,,,? := 0.44 in2 <br />Check for adequacy, <br />Allowable factored bending moment. Au := -C i JAs2) - C;,. A; Au = 3064211 in-lb <br />Design factored bending moment, Muin = 1747200 in-lb <br />Au <br />Factor of safety, F5 FS = 1.754 <br />Muin