2: Forces in Statically Determinate Beams and Plane Frames

2.9: Internal Forces in Frames

2.9-P1: Worked Examples

Worked examples from class, Fall 2011.

  1. Example F1

  2. Example F2

2.9-P2 Suggested Problems

For each of the frames shown:

  • calculate the reactions (both external and the forces on any internal pins).
  • show all reactions on appropriate FBDs.
  • thoroughly inspect the FBD and confirm that various combinations of applied forces are in equilibrium.
  • show that every joint is in equilibrium.
  • draw normal force, shear forces, and bending moment diagrams, clearly labelling the key values and showing the directions of all internal forces.

Figure

Problem 2.9-1

Figure

Problem 2.9-2

Figure

Problem 2.9-3

Figure

Problem 2.9-4

Figure

Problem 2.9-5

Figure

Problem 2.9-6