Given the following flexible pavement structure,

$p=90$ psi and $a=5$ inches

$E_1=300ksi{v}_1=0\mathrm{.}35$

$E_2=40ksi{v}_2=0\mathrm{.}40$

$E_3=20ksi{v}_3=0\mathrm{.}45$

$E_4=10$ksi,$v_4=0\mathrm{.}50$

Using WinLEA:

a$)$ Compute and plot the vertical deflection, $U_2,$ as a function of radial offset $(r)$ over the range $-$

$3ftr+3ft$ at depths $(z)$ of $0,8\mathrm{.}01,16\mathrm{.}01$ and $28\mathrm{.}01$ inches. Comment on your results.

b$)$ Compute and plot the vertical strain, ${}_{nx},$ as a function of radial offset $(r)$ over the range $-3ft$

$r+3ft$ at depths $(z)$ of $0,8\mathrm{.}01,16\mathrm{.}01$ and $28\mathrm{.}01$ inches. Comment on your results.

c$)$ Compute and plot the vertical stress, ${}_{2z},$ as a function of radial offset $($r$)$ over the range $-3ft$

$r+3ft$ at depths $(z)$ of $0,8\mathrm{.}01,16\mathrm{.}01$ and $28\mathrm{.}01$ inches. Comment on your results.

Consider using the following $r$ values: $0,1,2,4,8,18,$ and $36$ inches to cover the range $-3ftr$

$+3.$

d$)$ On the same graph, compute and plot the vertical and horizontal stresses, ${}_{\frac{?}{\text{b}\text{a}\text{r}}(z)}$ and ${}_{xx},$

respectively, under the center of the load as a function of depth $($z$).$ Comment on your results.

e$)$ On the same graph, compute and plot the vertical and horizontal strain, ${}_{xr}$ and ${}_{},$ respectively,

under the center of the load as a function of depth $($z$).$ Comment on your results.

Consider using the following $z$ values: $1,2,4,6,7\mathrm{.}99,8\mathrm{.}01,10,12,14,15\mathrm{.}99,16\mathrm{.}01,20,24,27\mathrm{.}99,$

$28\mathrm{.}01,36,44,$ and $50$ inches to cover the whole pavement structure.