PROBLEM # 2 (35 points) Using Castigliano's method, determine the vertical deflection at the middle of the
simply supported beam (point E) shown in the figure due to the vertical load P applied at point E. The second area moments for sections AC, CD and DB are 2I, I
and 2I, respectively.
IP
A
21
2I
B
c &/4
E
D e/4