[ANSWERED] A rectangular slab of concrete in a highway as shown in Figure P15–29 can be considered to have…

A rectangular slab of concrete in a highway as shown in
Figure P15–29 can be considered to have sides parallel to the road free and
sides perpendicular to the road simply supported. The critical buckling stress
is shown to be
where for medium strength concrete we assume E = 3:5
10
6
psi and v = 0:20. Let the slab dimensions be length a = 120 in., width b = 96
in., and thickness t = 6 in. Determine the uniform temperature increase in the
slab that will buckle it. Use a finite element code to solve this problem.