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Peak ground acceleration correlates best with the response of

  • A.buried pipelines running over long distances
  • B.stiff, short-period structures
  • C.very flexible, long-period structures such as tall towers
  • D.structures founded on deep soft clay deposits

Answer: B

Short-period structures respond to the high-frequency content that governs acceleration, so PGA is a reasonable index for them. Tall flexible buildings are driven by longer periods, where velocity or displacement is the better measure.

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