Discussion
Two records have the same peak acceleration but one lasts four times as long. The longer record is likely to be
Answer: C
Correct answer: more damaging, because of the additional cycles
Damage accumulates cycle by cycle: each large inelastic excursion degrades stiffness and strength and consumes part of the available ductility. Four times the duration means roughly four times the number of damaging cycles at the same amplitude, so the longer record is substantially the more severe despite the identical peak.
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