Q$2$ : A$-)$ Determine the bolanced case, Nor, and two additional paints of the

N$-$M interection curve for the column section given in the figure below. One of

the $N-M$ polrs must be above the balonced case, and the other one must be below

the threshold value of the balanced case.

$$ Sketch the N$-$M interoction curve roughly using found out points.

$C30,$$$420$

$f_{yd}=f_{ywd}=365$MPa

$f_{cd}=20$MPa,$k_1=0\mathrm{.}82$

$A{s}_1=A{s}_3=600m^2$

$A{s}_2=400m{m}^2$