Laserfiche WebLink
STO ' <br /> A <br /> WALLSYSTEM <br /> SEISMIC SLIDING <br /> The target factor of safety for seismic is 75% of the static value. Live loads are ignored in the analyses <br /> based on the basic premise that the probability of the maximum acceleration occuring at the exact same instant as <br /> the maximum live load is small. <br /> Details are only shown for sliding at the critical interface, sliding in the foundation or sliding in the reinforced <br /> fill zone <br /> The vertical resisting forces is Sum(W) -W7+ Pay+ Paev+ Pqdv SumVs = 0.00 <br /> Resisting force= SumVs*tan(phi) + intercept*Wu FRe=0.00 ppf <br /> Driving force= Pa_h + Pae_h/2 + Pqd_h + (Pif+ Pir) <br /> =0.00 +0.00 +22,691.41 +0.00 FDr=0.10 ppf <br /> FOS = FRe/FDr FoS =2.22 <br /> SEISMIC OVERTURNING <br /> Overturning is rotation about the front toe of the wall. Eccentricity is also a check on overturning <br /> Resisting Moment= M1 + M2 + MPav+ MPqdv+ MPaev/2 SumMrS =0.00 ft ppf <br /> Driving Moment= MPav+MPadh + MPaeh +MPif SumMoS =0.00 ft ppf <br /> Factor of Safety= SumMrS/SumMoS FoS=3.54 <br /> SEISMIC BEARING <br /> Bearing is the ability of the foundation to support the mass of the structure. <br /> Qult=c*Nc+q*Nq +0.5*gamma*(B')*Ng <br /> where: <br /> Nc=35.49 <br /> Nq =23.18 <br /> Ng =30.21 <br /> c=50.00 psf <br /> q =240.00 psf <br /> Calculate Ultimate Bearing, Qult(seismic) Qult=24,741.34 psf <br /> Equivalent Footing Width, B'= L-2e+ IA pad B' =41.75 ft <br /> Bearing Pressure= sumVs/B' + (2B+ LP depth)/2 * LP depth *gamma sigma=3,443.29 psf <br /> Factor of Safety for Bearing = Quit/Bearing FoS=7.19 <br /> Note: Calculations and quantities are for PRELIMINARY ANALYTICAL USE ONLY and MUST NOT be used for final <br /> n or construction without the independent review, verification, and approval by a qualified professional engineer. <br /> UltraWall 5.0.19183 17 <br />