16.7 - Seismic Excitation in MDOF Systems
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Practice Questions
Test your understanding with targeted questions
What is the influence vector?
💡 Hint: Think about how the ground motion can be represented mathematically.
What is seismic excitation?
💡 Hint: What do we observe in buildings during an earthquake?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the influence vector usually consist of during uniform ground motion?
💡 Hint: Think about how ground motion affects each mass point.
True or False: Modal analysis allows you to analyze all modes simultaneously without uncoupling them.
💡 Hint: Consider how modes are separated in dynamic analysis.
1 more question available
Challenge Problems
Push your limits with advanced challenges
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.
💡 Hint: 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.
💡 Hint: Reflect on how damping naturally limits responses to dynamic forces.
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