A concrete slab, 40 ft. long, 11 ft. wide, and 9 in. thick, is placed on...

A concrete slab, 40 ft. long, 11 ft. wide, and 9 in. thick, is placed on a subgrade having a modulus of subgrade reaction of 200 pci. A 9000-lb single-wheel load is applied on the edge of the slab over a circular area with a contact pressure of 100 psi. Determine:

The maximum tensile stress due to the 9000-lb wheel load;
The curing stresses (both x and y directions) at the edge during the night when the temperature differential is 13.5°F per inch of slab. (Note: the total temperature differential should multiply slab thickness.)

Use the information: modulus of elasticity of concrete = 4×10⁶ psi, Poisson’s ratio of concrete = 0.15, coefficient of thermal expansion of concrete = 5×10^-6 /°F.

Expert Solution

The stress values can be easily calculated by using Westergaard equation (analysis based on plate theory),later further modifications given by Tiller and Sutherland.

Ally Wells answered 6 months ago

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