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4 cards from this section. Quick, good the night before a test.
Define response spectrum analysis in earthquake engineering.
Look at how it deals with the input from seismic activities.
What is a mode shape?
Think about how a guitar string vibrates at different frequencies.
What is the primary goal of response spectrum analysis?
Think about why engineers need to prepare for earthquakes.
True or False: Higher modes are always significant in seismic design for low-rise buildings.
Consider how the number of stories might affect mode significance.
A multi-storey building has a response dominated by its first two modes. If the first mode has a frequency of 2 Hz and the second mode has a frequency of 3 Hz, calculate the expected maximum displacements if the building is subjected to seismic loading of 0.5g.
Consider how you might convert frequency to displacement using response spectra.
Critically evaluate what might happen if a designer decides to ignore higher mode effects in a 50-story building located in a seismic-prone area.
Think about how modes interact and how neglecting them could lead to unexpected structural behavior.
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