PLEASE HELP WITH PART B$!!!$

A single concrete frame layout and cross section is shown in Figure $1$ and Figure $2$ respectively

to be analysed with the Portal, Cantilever and Moment Distribution Methods.

a$.$ Explain the differences of the three methods $($Portal$,$ Cantilever and Moment

Distribution$)$ and state which method would be considered more accurate.

b$.$ Use the Portal and Cantilever methods to analyse the frame on gridline $2$ with a lateral

load of $120KN$ as shown in Figure $2$ to determine the approximate axial, shear forces

for all members and the reaction forces $($axial$,$ shear and moment$)$ at the fixed

supports $($A$,$ B$,$ C$).$

c$.$ Use the moment distribution method to analyse the frame on gridline $2$ with a lateral

load of $120KN$ as shown in Figure $2$ to determine the shear forces and joint moments.

d$.$ Use the results from the moment distribution method to draw the bending moment

diagram.

Note that all members are assumed to have the same cross$-$sectional area and ignore their

self$-$weight.