For the simply supported beam given below, use Castigliano's 2 Theorem to calculate the slope at D and displacements at E and C. With Virtual Work find the displacement at B and slope at E. Note the different I values along the member length A I B 15 kips 2.9 kips/ft D 31 E 41 C 21 12 ft + 8 ft 9 ft 11ft 40 ft