Solve all problems using the finite element stiffness method. For the fixed-fixed beam...

Solve all problems using the finite element stiffness method.

For the fixed-fixed beam subjected to the uniform load w shown in Figure P4–12, determine the midspan deflection and the reactions. Draw the shear force and bending moment diagrams. The middle section of the beam has a bending stiffness of 2EI; the other sections have bending stiffnesses of EI.