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GOLD PRINCE PORTAL BULKHEAD DESIGN CALCULATIONS August 19, 1993 <br /> Notation: <br /> a= compression zone depth(in) minimum to balance rebar tension <br /> A,=area of rebar b =beam width(1 in) <br /> ba,=web width(12 in) C =comp bendin force(lb) <br /> c=centroidal distance(in) D =dead load Ot <br /> d=distance, extreme compression fiber to rebar centroid (in) <br /> E=earthquake load (ft) E.=earthquake mass (lb secs) <br /> ft <br /> EE=total earthquake load (lb) F =fluid load (lb ft)FS =factor of safety fI =concrete comp strength(psi) <br /> fc =square root of fIC fcl =concrete tensile strength(psi) <br /> fs = concrete shear strength(2 psi) fy =rebar yield strength(psi) <br /> g=acceleration due to gravity(32.2 ft H=design water head(14 ft) <br /> Sec 2 <br /> h=tunnel height (ft) I=moment of inertia <br /> K= (3.5—2.5 d°) L=beam length or depth(ft) <br /> 1 =tunnel width(ft) M=bending moment (ft-lb) <br /> K=nominal beam moment (ft lb) IV);,=factored beam moment (ft lb) <br /> N ,.= earthquake beam moment(ft-lb) m,=minimum cover, form face to <br /> rebar surface(in) <br /> S = section modulus S,=line-of-sight distance (ft) <br /> T=tensile bending force (lb) U=required strength (ft) <br /> U.=earthquake required strength Ve=concrete shear strength(lb) <br /> V.=nominal shear force(lb) V.=rebar shear strength(lb) <br /> V.=factored shear force (lb) v,=rebar shear stress(psi) <br /> W=bulkhead load (lb) w =uniform load (ft) <br /> a =earthquake acceleration (0-087 ftZ) p =pressure head (psi) <br /> sec <br /> p =pressure gradient psi A`p = <br /> s ft ., bid <br /> = strength reduction factors yp =water density(62.4PCF) <br /> 0.90 flexure rebar tension y. =concrete density(151PCF) <br /> 0.85 concrete shear a =flexure stress(psi) <br /> 0.65 plain concrete flexure <br /> 1 <br />