10.4. Examples

Try these first

1. 1.

   Define statically indeterminate structures.

   Hint

   Think about the conditions for equilibrium.

2. 2.

   What is the flexibility method?

   Hint

   Consider the approach to analyze forces and displacements.

3. 3.

   What characterizes a statically indeterminate structure?

   • More reactions than equations
   • Equal reactions and equations
   • More supports than members

   Hint

   Think about the balance of forces.

4. 4.

   True or False: The flexibility method is easier to use than direct analysis for all structures.

   • True
   • False

   Hint

   Consider the definitions and applications discussed.

5. 5.

   Calculate the displacement of a braced frame when subjected to a lateral load and temperature drop of 15°C. Use the flexibility method for full analysis.

   Hint

   Use final displacement expressions from your lesson.

6. 6.

   Given a steel frame with redundancy, analyze the effects on forces and identify potential failure points if the primary member is removed.

   Hint

   Visualize the structure after a member is removed.