Practice Mode Shapes Of Typical Structures (15.6) - Mode Shapes - Earthquake Engineering

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6 sample questions

Question 1.
What defines a mode shape?
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Think about how structures respond to vibrations.
Question 2.
What structure type has floors modeled as lumped masses?
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Consider what stiffens them laterally.
3Question 3.
What is the first mode shape of a shear building mainly characterized by?
- Lateral deflection
- Torsion
- Vertical displacement
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Consider how a building sways during an earthquake.
4Question 4.
T/F: Cantilever beams only exhibit single curvature in their first mode.
- True
- False
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Think about how their shapes evolve.
Question 5.
Design a shear building taking into account the mode shapes discussed. How will you mitigate the effects of resonance?
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Think about alterations to the geometry and stiffness.
Question 6.
A cantilever beam is subjected to a load resulting in its first and second mode shapes. What are critical design considerations we need to account for?
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Remember how higher modes increase curvatures.

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