Q$3.$ The plane frame shown in Fig. Q$2$ is now supposed to be subjected to only

vertical loadings $($i$.$e$.G_k$ and $Q_k).$

$($a$)$ Identify a simplified sub$-$frame for determining the bending moments and shears

in the floor beam A$2-$B$2-$C$2-$D$2.$

$($b$)$ Identify various load combinations for the simplified sub$-$frame in Part $($a$)$ at the

ultimate limit state, according to Eurocode.

$($c$)$ Draw the bending moment and shear force envelopes for the sub$-$frame and load

combinations obtained from Parts $($a$)$ and $($b$).$

$($d$)$ Identify various load combinations for the structural design of all first$-$storey

columns $($i$.$e$.$ column sections from the ground to the $1^{st}$ floor$),$ according to

Eurocode. Use the complete plane frame.

$($e$)$ Identify a simplified sub$-$frame and the corresponding load combinations for

determining the column moment at the first$-$floor joint B$1$ at the ultimate limit

state, according to Eurocode. Based on these load combinations, determine the

maximum column moment at the joint.

$($f$)$ Determine the ultimate design axial load in the interior column $B$ at the underside

of the first floor $($see the joint B$1).$

$($g$)$ Compare the column moment and axial load in column B obtained from Parts $($e$)$

and $($f$)$ with those obtained from Part $($d$).$

Fig. Q$2$