QUESTION $3$

$[50$ MARKS$]$

Use an excel program to determine the reactions at the supports A and $D$ of figure $Q3$ below, using the stiffness matrix method. Joints B and C are fixed connected, and so is the supports A and D$.$

$A=150c{m}^2$

$I=35000c{m}^4.$

$E=200$GPa

Also, Draw the shear force and bending moment diagrams.

FIGURE Q$3$