同时还要具体指定震动持续时间的级别。
You also have to specify a duration of shaking over a given level.
我们的确会使用震动持续时间来估计一些小型地震的震级。
We actually do use the duration of shaking to estimate the magnitude for some small earthquakes.
通过大量人工波及天然地震记录输入结构的分析，我们得到了地震动持续时间与结构弹塑性耗能之间的关系。
By introducing a number of natural and artificial ground motion records into structural analysis, the relationship between earthquake duration and energy absorbed by structures was obtained.
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