QUESTION TWO

$(50$ Marks$)$

Figure $2$ shows a beam ABCDEFG with supports at B$,$ D$,$ and G$.$ Further, the beam has frictionless hinges at $C$ and $D.$

Figure $2$

$2\mathrm{.}1.$ Draw the following influence lines using Muller Breslau's Principle.

a$)$ The vertical reactions at support B$.(3)$

b$)$ The vertical reactions at support D$.(5)$

c$)$ The vertical reactions at support G$.(5)$