14.6.3. Boundary Conditions

Try these first

1. 1.

   What happens to the natural frequency when a structure is supported by fixed supports?

   Hint

   Think about how fixed supports restrict movement.

2. 2.

   What type of support allows for rotation?

   Hint

   Consider which supports prevent translation.

3. 3.

   What is the impact of fixed supports on natural frequency?

   • Decreases frequency
   • Increases frequency
   • No impact

   Hint

   Think about how fixed supports restrict movement.

4. 4.

   True or False: Pinned supports allow both translation and rotation.

   • True
   • False

   Hint

   Consider the characteristics of pinned supports.

5. 5.

   A building has fixed supports at the base and free supports at the top. Design a hypothetical test to evaluate its response to an earthquake, discussing predicted outcomes based on boundary conditions.

   Hint

   Focus on how the interaction of these supports will impact behavior under dynamic loading.

6. 6.

   How would you recommend adjusting the boundary conditions of an existing structure to enhance its earthquake resilience?

   Hint

   Think about balancing support types to manage frequencies effectively.