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3 cards from this section. Quick, good the night before a test.
What is the influence vector?
Think about how the ground motion can be represented mathematically.
What is seismic excitation?
What do we observe in buildings during an earthquake?
What does the influence vector usually consist of during uniform ground motion?
Think about how ground motion affects each mass point.
True or False: Modal analysis allows you to analyze all modes simultaneously without uncoupling them.
Consider how modes are separated in dynamic analysis.
Given a 5-story building with a mass matrix [M] made up of 1000 kg for each story, and a stiffness matrix [K] summed as 2000 N/m per story, derive the influence vector if subjected to a uniform ground acceleration of 0.5 m/s².
Consider how masses and stiffness relate to seismic forces.
Discuss the impact of ignoring damping in the analysis of seismic response for an MDOF structure.
Reflect on how damping naturally limits responses to dynamic forces.
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