Question $2$

Using the first principals based on equilibrium of forces and compatibility of strains in an RC section, check whether the shown two sections are under$-$ or over$-$reinforced for each of the following area of steel:

$A_s=500m{m}^2$

$A_s=1000m{m}^2$

$A_s=1500m{m}^2$

$A_s=2000m{m}^2$

sec$.(1-1)$

Consider $f_{cu}=25$MPa and $F_y=360$MPa

sec$.(2-2)$