32.13.2. Fixed Base vs Flexible Base Analysis

Try these first

1. 1.

   What is fixed base analysis?

   Hint

   Think about how a tree might stand tall and firm.

2. 2.

   What does flexible base analysis consider?

   Hint

   Consider what happens when you walk on a soft surface!

3. 3.

   What foundational type does fixed base analysis ignore?

   • Flexibility
   • Cost
   • Safety

   Hint

   Focus on the rigidity of the foundation.

4. 4.

   True or False: Flexible base analysis considers ground stiffness.

   • True
   • False

   Hint

   Check how the structure interacts with the ground.

5. 5.

   Consider a building designed with fixed base analysis in an area prone to earthquakes. What might be the practical consequences in terms of safety and performance?

   Hint

   Think about how structural damage manifests during earthquakes.

6. 6.

   Evaluate a scenario where a structure's design changes from fixed base to flexible base analysis. What changes would occur in the seismic response?

   Hint

   Reflect on how flexibility helps mitigate seismic forces.