14.9. Importance in Earthquake Engineering

Try these first

1. 1.

   What is natural frequency?

   Hint

   Think about vibrations without external forces.

2. 2.

   What can happen if an earthquake's frequency matches a structure's natural frequency?

   Hint

   Recall what we discussed about amplified vibrations.

3. 3.

   What is resonance?

   • When a structure vibrates freely
   • Matching frequency causing amplification
   • Absorption of vibrations

   Hint

   What happens during an earthquake when frequencies align?

4. 4.

   Dynamic dampers are used to:

   • True
   • False

   Hint

   Think of products that help stabilize during movement.

5. 5.

   Given a building's natural frequency and an earthquake frequency, analyze the risks if they align closely. What measures could be taken to ensure safety?

   Hint

   Consider how you can change the properties of the structure to keep it safe.

6. 6.

   Evaluate the impact of local soil conditions on the natural frequency of buildings. Provide an example of a historic earthquake where this was a factor.

   Hint

   What specific characteristics of soils will affect how buildings respond to seismic forces?