题目内容
场地越软，反应谱峰值偏长周期。这是因为，软弱场地，地震动以长周期为主，所以由于共振效应，长周期结构反应大。
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已知某地的地震系数为0.20，动力系数为2.25，该地的地震影响系数为0.25
6多选（3分）地震动的三要素包括
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