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A design spectrum differs from a response spectrum in being

  • A.smooth and derived from many records
  • B.computed from one single accelerogram
  • C.plotted against distance rather than period
  • D.applicable only to undamped structures

Answer: A

A response spectrum for one record is jagged, and its peaks and valleys are accidents of that motion. Design spectra are smoothed envelopes drawn from many records so that a small change in period does not change the demand abruptly.

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