Beam Matrix Analysis - Stiffness Method Problem 1 [20 pts] - For the beam shown below, compute the beam rotation (clockwise as positive) and deflection (upward as positive) at joint B (i.e., D1 and D2, respectively) using the stiffness matrix analysis technique Also, determine the fixed end moment reactions at support A and C (ARI and AR2, respectively). Assume EI2 =2EI₁ = 2EI. (Hint: set-up and solve the below two matrix equations - see the lecture handout). {AD }2x1 = {ADL }2x1 +[S] 2x2 {D} 2x1 {AR }2x1 = {ARL }2x1 + [ARD] 2x2 {D} 2x1 (A) P (B EI, * 1/2 + 1/2 * Notations used: EI₂ L AR 2 A Di ↑ D2 2