11.19 - Coupled Lateral-Torsional Vibrations
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Practice Questions
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What are coupled vibrations?
💡 Hint: Think about how two types of movement might influence one another.
Define eccentricity in relation to structural vibrations.
💡 Hint: Consider how these centers interact in a structure.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What primarily causes coupled lateral-torsional vibrations?
💡 Hint: Think about offset locations in a structure.
Torsional amplification increases demands on which structural elements?
💡 Hint: Consider where stress might be concentrated in a structure.
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Challenge Problems
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A building designed with a center of mass significantly offset from its center of stiffness is hit by a lateral seismic force. Calculate the resultant torsional effect considering the displacement patterns.
💡 Hint: Use calculations from torsional dynamics.
In a seismic analysis of a 10-story irregular building, each floor has an unequal mass distribution. Model the building in a dynamic response simulation and assess if it meets seismic codes.
💡 Hint: Refer to simulation software for modeling structures under dynamic loads.
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