Question

Question 7 Draw the shear and moment diagrams for the loaded beam. After you have the diagrams, answer the questions as a check on your work 7 kN 5 kN 8 kN/m 5 kN/m 9 m 5 m Questions: When x 1.3 m, V- When x = 8.4 m, V = When x 12.4 m, V- when x = 22.1 m, V kN kN kN kN kN·m kN m kN·m kN m

Answer 1

Calculations: - R_A + R_B = 30 + 7 + 72 + 5 = 114 kN Sigma M_A = (5 times 24) + (72 times 14.5) + 7 times 10 + (30 times 7) = R_B times 19 R_B = 1444/19 = 76 kN R_A + R_B = 114 implies R_A = 38 kN Therefore R_A = 38 kN: R_B = 76 kN \r\n Questions: - In the Question it was not clearly mentioned i, e from which side we have to measure V and M. I take reference from point A i, e left side at x = 1.3 mt from A V = 38 kN: M = 38 times 1.3 = 49.4 kNm at x = 8.4 mt from A V = 38 - 22 = 16 kN M = 38 times 84 - 5 times 4.4 times 2.2 = 270.8 kNm at X = 124 mt from A V = 38 - (5 times 6) - (8 times 2.4) = -11.2 kNm