$ex1$

Compute $3$ points on the interaction diagram $A,B$ and $C$ for tied column shown below Assume $f^{\text{'}}c=28$MPa,$fy=420$Mpa

A : Pure Compression

B : $t=0$

C : ${}_t=-0\mathrm{.}5{}_y$

$D$:${}_t={}_y$

$E$:$t=0\mathrm{.}005$

$F$: Pure Flexure

G: Pure Tension