A Design Example for a Circular Concrete Tank PCA Design Method
CVEN 4830/4434 University of Colorado, Boulder Spring Semester 2008 Prepared by Ben Blackard
*Circular Tank Example
D = 90 ft
t
H = 16 ft 6 ft
grade
groundwater table fluid density inside tank = 65 pcf f′c = 4,000 psi fy = 60,000 psi
soil bearing capacity = 2,400 psf Walls above the groundwater table should be designed using a lateral earth pressure equivalent to that developed by a fluid weighing 40 pcf, below the groundwater table use 90 pcf.
*Tensile Hoop Forces Assume a wall thickness t = 12″ wu = 1.65×1.7×65 pcf = 183
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