Discussion
Spectrum-compatible artificial records are sometimes preferred because they
Answer: C
Correct answer: match the target spectrum closely at every period
An artificial record is generated so that its response spectrum matches the design spectrum across the whole period range, which removes the scatter that real records show and makes the analysis reproducible. The cost is that such a record is not a real earthquake: its energy content is generally too high and its phasing artificial, so real records are preferred where enough are available.
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