Construct shear force and bending moment diagrams for the framework shown in Fig. P.3.17.
Chapter 3
Q. 3.17
Step-by-Step
Verified Solution
The truss of Fig. P.3.17 is treated in exactly the same way as though it were a simply supported beam. The support reactions are calculated by taking moments and resolving forces and are as shown in Fig. S.3.17(a).
Shear force
Between A and B the shear force is constant and equal to -60 kN. Between B and C the shear force is equal to -60 + 50= -10 kN and between C and D the shear force is equal to +140 kN; the complete distribution is shown in Fig. S.3.17(b).
Bending moment
The bending moment at the supports is zero. At B the bending moment is equal to +60×8=480 kNm while at C the bending moment is +140×4=560 kNm; the distribution is shown in Fig. S.3.17(c).
