ABSTRACT
Find Nφ and M in a cylindrical wall having the top edge free and the bottom edge encastré due to: (a) initial trapezoidal circumferential prestressing (Figure 8.2a, equations 8.1-8.3); (b) hydrostatic pressure plus prestressing
after the occurrence of time-dependent losses. The tank is assumed to be full to the top of the wall. Given data: {l, r, h} = {10, 20, 0.30} m ({33, 66, 1} ft); γ = 10.0 kN/m3 (63.6 1b/ft3); σφ r = −1.5 MPa (−220 psi); ηloss = 1.15; Poisson’s ratio, ν = 1/6.
