1.13.2. Frequency Ranges of Earthquake Motions

Try these first

1. 1.

   What is the natural frequency range for low-rise buildings?

   Hint

   Consider the number of stories.

2. 2.

   Define resonance in the context of earthquake engineering.

   Hint

   Think about matching frequencies.

3. 3.

   What is the typical natural frequency range for high-rise buildings?

   • 0.5-1.5 Hz
   • 0.2-1.0 Hz
   • 1-3 Hz

   Hint

   Think about the building height.

4. 4.

   Resonance occurs when the frequency of earthquake waves matches a building's natural frequency.

   • True
   • False

   Hint

   Reflect on the implications of matching frequencies.

5. 5.

   A new low-rise building experiences an earthquake with a dominant frequency of 5 Hz. If the natural frequency of the structure is 5 Hz, what considerations should engineers keep in mind regarding resonance?

   Hint

   Consider strategies to mitigate resonant effects.

6. 6.

   Assess a situation in which a medium-rise building encounters an earthquake with frequencies predominantly between 1-3 Hz. What structural adaptations can significantly lower the risk of resonance?

   Hint

   Think about additional mechanisms to absorb shocks.