When filled to capacity, the unpressurized storage tank shown contains water to a height of h= 20 ft. The outside diameter of the tank is 8 ft and the wall thickness is 0.625 in. Determine the maximum normal stress at the base of the tank. (Weight density of water = 62.4 lb/ft³) 479 psi O 657 psi O 899 psi 783 psi O 705 psi O O O O O h

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Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.