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Project Design.Mogul Tunnel Bulkhead By JFA Date 8/21/03 <br />10.6' x 9.5' ! 9' Thick. Station 2+411 <br />Sheet 3 of 6 <br />Bulkhead thickness (lenethl to resist concrete shear from static fluid load on face: <br />Factored static fluid load on bulkhead face, F s := 144• fs•p•h•I F s = 1917779 lb <br />F <br />Factored static fluid load/sq ft of face, ~ fs := h.i ~ ~ =19044 psf <br />Concrete shear strength, fcs '= 2• fc fcs = 109.5 psi <br />Fs <br />Bulkhead thickness to resist factored static fluid load, L s :_ <br />2•(h+1)•144•f~ Ls=3 ft <br />Plain concrete deep-beam bending stress design for earthquake acceleration: <br />Earthquake static fluid load per foot of tunnel height,E fe ~_ ~ fe'F s E fe = 2013668 ]b <br />Factored fluid mass accelerated by earthquake, E ~, :_ ~ ~ S ~ y W h I a E ~ = 347312 16 <br />B <br />~ e8'Lt•h•l•y c•a <br />Bulkhead mass accelerated by earthquakeF bm ~_ E bm = 17890 lb <br />8 <br />Factored required strength for bulkhead accelerated by earthquake, U ~ := E fe + E ~ + E bm <br />U a = 237$$70 Ib <br />U <br />Factored unifornr earthquake load on bulkhead face, u :_ °` u = 23623 psf <br />h•1 <br />2 <br />Nominal earthquake bending moment, M n :_ °8 M u = 331790 ft-lb <br />M <br />Factored earthquake bending moment, M u :_ ° M u = 510446 ft-lb <br />~ Pc <br />Bulkhead section modulus, S ;= 144•LZ <br />6 <br />Concrete flexural (tensile) design strength, f cl := 3 • f c f cl = 164.3 psi <br />Mu Mu Mu <br />as. S as, 144•LZ as. 24•LZ <br />6 • <br />M <br />°s'-fcl L:= ° L=11.4 ft <br />24•a s <br />