结果表明，砂土对地震动可起滤波和隔震作用；
Numerical results demonstrate that the liquefied soil can filter and isolate vibration.
软土对高频地微动信号有滤波作用，对低频信号起放大作用，而硬土层则相反。
Soft soil can filter high frequency signals, but can amplify low frequency signals.
砂土对地震动可起滤波和隔震作用；
The liquefied soil can filter and isolate vibration. Transient minus pore pressure occurs.
砂土对地震动可起滤波和隔震作用；
The liquefied soil can filter and isolate vibration. Transient minus pore pressure occurs.
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