Laserfiche WebLink
Project Design Koehler Tunnel Bulkhead By JFA Date 7/21/03 <br />8.5' x 9' l12' Thick. Station 3+021 <br />Sheet 3 of 6 <br />Bulkhead thickness (length) to resist concrete shear from static fluid load on face: <br />Factored static fluid load on bulkhead face, F s := 144• ~•p•h•I F s = 3321471 ib <br />F <br />Factored static fluid loadJsq ft of face, ~ ~ := h-i ~ fs = 43418 psf <br />Concrete shear strength, fey := 2• fc feS = 109.5 psi <br />Fs <br />Bulkhead thickness to resist factored static fluid load, L s :_ <br />2•(h+1)•144•fcs Ls=6.02 ft <br />Plain concrete deeo-beam bending stress design for earthquake acceleration: <br />Earthquake static fluid load per foot of tunnel height,E ~ :_ ~ fe•F s E fe = 3487544 ]b <br />~ ~ S ~•y W,•h•1•a. <br />Factored fluid mass accelerated by earthquake, E Sn := E ~, = 2017743 16 <br />B <br />Bulkhead mass accelerated by earthquakes bn, :_ ~ ~ L t h l y ° a E bm = 26218 Ib <br />B <br />Factored required strength for bulkhead accelerated by earthquake, U a, := E fe + E ~ + E bm <br />U a = 5531506 lb <br />U <br />Factored uniform earthquake load on bulkhead face, u := a u = 72307 psf <br />h•1 <br />Nominal earthquake bending moment, M n := ug zZ M o = 653025 ft-16 <br />M <br />Factored earthquake bending moment, M u :_ ° M u = 1004654 ft-Ib <br />~ pc <br />Bulkhead section modulus, S ;= 144•LZ <br />6 <br />Conaete flexural (tensile) design strength, f d := 3 • f o f el = 164.3 psi <br />Mu Mu Mu <br />as• S os• 144•LZ as. 24•L~ <br />6 <br />M <br />as•-fcl L:= u L=15.96 ft <br />24•a s <br />gretar.moe'rmnsm ~vz vn~ <br />