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3 cards from this section. Quick, good the night before a test.
Define torsional motion.
Think about how forces might act on a building.
What is a degree of freedom?
Consider how many ways a single floor can move.
What is torsional motion?
Think about how the structure reacts when forces are applied unevenly.
True or False: The center of mass and center of stiffness often align perfectly in all buildings.
Consider how shapes influence the distribution of weight.
Consider a rectangular building that is asymmetrical along one axis. Calculate the expected torsional response if the center of mass is 2 meters from the center of stiffness. Assume the torsional spring constant to be known.
Understand how to relate torque to angular displacement.
Design a hypothetical building with noted dimensions and mass distribution such that it minimizes torsional effects. Present calculations and justify design choices.
Think about structural layout and materials used.
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