Practice Bandwidth Of Earthquake Motions (14.10.3) - Natural Frequencies

Practice: Bandwidth of Earthquake Motions

Lesson 14.10.3Natural Frequencies

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8 questions

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6 sample questions

Question 1.
What is a narrow-band motion?
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Think about frequency concentration.
Question 2.
Define broad-band motion.
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Consider how many frequencies are involved.
3Question 3.
What characterizes narrow-band ground motions?
- High energy spread over many frequencies
- High energy concentrated in a limited frequency range
- Energy distributed with no specific pattern
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Think about how energy distribution affects risk.
4Question 4.
True or False: Broad-band motions can lead to resonance.
- True
- False
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Consider the definition of resonance.
Question 5.
Calculate the risk of resonance for a building with a natural frequency of 2 Hz subjected to a narrow-band motion at the same frequency. What design considerations would you suggest?
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Consider what changes could reduce the likelihood of resonance.
Question 6.
Describe how an earthquake with both narrow-band and broad-band characteristics would affect a high-rise building. What approaches can mitigate these effects?
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Think about the strategies you learned for handling varied motions.

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