Question $2$

Calculate the plastic moment capacity for the two composite sections shown below assuming:

the yield stress of the flanges is $360($N$)/($m$)$m$^(2)$ and the yield stress of the webs is $250($N$)/($m$)$m$^(2).$

Answers: $($i$)$ Mp$=334$kNm$,($ii$)$ Mp$=652\mathrm{.}3$kNm$,$

Question $3$

For the composite section below, the yield stress of top flangeis $250($N$)/($m$)$m$^(2),$ the yield stress of the web and the bottom flange

is $450($N$)/($m$)$m$^(2).$ All dimensions in mm $.$

$($a$)$ determine the positions of plastic neutral axis and

$($b$)$ find the value of Mp$.$

Answers: Mp$=2986$kNm