16.11.2 - Steps in Modal Response Spectrum Analysis
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Practice Questions
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What is the first step in the Modal Response Spectrum Analysis?
💡 Hint: Think about what we need to understand before analyzing responses.
Define spectral acceleration in the context of seismic response.
💡 Hint: Consider what measures the effects of earthquakes on structures.
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Interactive Quizzes
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What is the first step of Modal Response Spectrum Analysis?
💡 Hint: It's about understanding the structure's response.
True or False: Spectral acceleration is derived from the response spectrum.
💡 Hint: Think about how we measure structural responses to seismic forces.
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Challenge Problems
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A building modeled as an MDOF system has the following spectral accelerations for three modes: 0.8g, 1.2g, and 1.5g. If the modal participation factors are 0.4, 0.3, and 0.3 respectively, compute the peak modal response.
💡 Hint: Apply the peak response formula accordingly.
For a dual-mode system where the spectral accelerations are 50 cm/s² for the first mode and 70 cm/s² for the second mode, and their respective modal participation factors are 0.6 and 0.4, calculate the combined peak response using CQC.
💡 Hint: Use the CQC formula to blend the results.
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