14.11. Site Effects on Natural Frequency

Try these first

1. 1.

   How do soft soils affect natural frequency?

   Hint

   Think about the relationship between soil type and frequency.

2. 2.

   What is resonance?

   Hint

   Consider how vibrations are amplified.

3. 3.

   How do soft soils influence natural frequency?

   • Increase natural frequency
   • Lower natural frequency
   • Have no effect

   Hint

   Think about how flexibility affects frequency.

4. 4.

   True or False: Site amplification can occur in hard soils.

   • True
   • False

   Hint

   Recall what types of soils are problematic.

5. 5.

   Assess the potential impact of resonance on a structure located on soft soil during an earthquake event. Include design recommendations.

   Hint

   Think about the building's response and how it can be modified.

6. 6.

   Given historical earthquake data, analyze how site amplification can affect modern building codes.

   Hint

   Consider lessons learned from past earthquakes.