Practice Natural Frequencies (14) - Natural Frequencies - Earthquake Engineering

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10 questions

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6 sample questions

Question 1.
Define natural frequency.
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It relates to how a structure would vibrate naturally.
Question 2.
What happens in free vibration?
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Think about what happens when you pluck a string.
3Question 3.
What is natural frequency?
- Frequency of external forces
- Frequency at which a system oscillates naturally
- Frequency of forced vibrations
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Think of it as the frequency the structure prefers.
4Question 4.
True or False: Damped systems exhibit continuous vibrations indefinitely.
- True
- False
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Remember what damping does to energy over time.
Question 5.
A building has a mass of 2000 kg and a stiffness of 80000 N/m. Calculate its natural frequency.
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Apply the formula step by step, starting with stiff and mass values.
Question 6.
Discuss the impacts of resonance during the 1985 Mexico City earthquake with respect to natural frequencies.
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Think about the relationship between building designs and the characteristics of the earthquake.

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