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5 cards from this section. Quick, good the night before a test.
What is base excitation in structural dynamics?
Think about an earthquake and how the ground moves.
Define relative displacement.
Consider how a building moves compared to the ground underneath it.
What does the equation mx¨(t) + cx˙(t) + kx(t) = -my¨(t) represent?
Look for the part addressing ground movement.
True or False: Relative displacement considers only the motion of the structure.
Think about how displacement measurements are made.
A building experiences a base excitation due to an earthquake where the ground accelerates at 2 m/s². If the mass of the building is 1000 kg, calculate the dynamic force exerted on the building.
Use the mass and acceleration to find the force.
Discuss the implications of phase angle in a building designed in an earthquake-prone zone. What considerations should be factored into its design?
Think about ways to reduce impact during resonance.
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