Procedure 4-9 Seismic Design - Vessel on Conical Skirt

Procedure 4-9 Seismic Design - Vessel on Conical Skirt 

A = AS ME Code strain factor, dimensionless Ab = Area of base plate supported on steel, in At = Area required for one anchor bolt, in  

Bp = Allowable bearing pressure, PSI Do = OD of vessel shell, in Dsk = OD of skirt at base plate, in E = Modulus of elastidly, PSI Fc = Allowable compressive stress, PSI f = Load at support points. Lbs fp = Bearing pressure, PSI Ft = Allowable sttess, tension, PSI Fy = Minimum specified yield strength of skirt at design temperature, PSI 

Fi or F2 = Seismic load for upper or lower portion of vessel 

Maa or BB = Overturning moment due to earthquake, In-Lbs, at elevation A-A or B-B Mb = Bending moment, In-Lbs Mx or My = Internal bending moment in base plate, inlbs 

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