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The frame shown below is subject to a short duration earthquake causing the supports of the frame move horizontally with an acceleration indicated in the
The frame shown below is subject to a short duration earthquake causing the supports of the frame move horizontally with an acceleration indicated in the figure. Note that T is the natural period (inverse of natural frequency). The damping ratio of the frame is 1%.
30 ft. B 60 kips 30 ft. U 24 ft. 17 s/9 12 0.2 T/4 T/2 t, sec
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