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inn <br />r <br />Project, Steve Adit Bulkhead, Sta. 2+65 <br />10' Thick, 10' Wide, 10' High, #6 Rebar- <br />4'!J V Ih/?J Itl <br />By _l!dEL/JFA Date 10/30/07 <br />Sheet 6 of 8 <br />Reinforced concrete deep-beam hendine stress desien for earthouvilce acceleration <br />C = ?),.,,.f?bWa = 0.85(3000)12a = 30600a T = AQf31 = 60000AS <br />C=T 30600a = 60000AS a = (60000 AS)/30600 = 1.961 AS <br />Factored earthquake bending moment, 1 M11 = 178332 ft-lb <br />,N6k:= 12. Mu Kin = 2139989 in-lb <br />Maximum concrete rebar cover, J1:= 12-L1- m,: d 116.500 in <br />K, = A,f,(d-a/2) = 60000AJ116.5 - 1.961 AS/2) = 60000 Asd - 58830 AS2 <br />58830 As2 - 60000 Asd + Muir = 0 58830 CAI:= -60000-d IqL:= Kin <br />-CZ - C2 - 4 Cl -C? <br />C AS = 0.307 in2 <br />2 <br />One cage of 46 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 in2/ft of steel area- <br />Therefore, A5,:= 0.44 in'- <br />Cheek for adequacy, <br />Allowable factored bending moment, &l.= -C 1. (n,2) - C 2. AS A„ = 3064211 in-lb <br />Design factored bending moment, Muin = 2139989in-lb <br />Factor of safety, 1=S := At, FS = 1.432 <br />M Muin