关于地震动速度脉冲对结构的影响虽已有若干研究结果，但还没有应用到实际工程中，而关于地震动位移峰值对结构的影响则还没有见到相关研究成果的介绍。
Even if there are some conclusions about the effects of velocity pulse on structures, but it hasn't been applied in practice yet, and the effect of PGD on structures is barely on research.
文章最后给出了美国西部考虑震源破裂方向的地震动峰值加速度和均方根加速度的衰减关系。
Finally, the formulas of PGA and RMS accelerations attenuation dependent on the rupture direction of the seismic source are presented for the Western United States.
作为地震动强度指标，峰值加速度一直是研究最多的物理量。
As the intensity index of ground motion, PGA (peak ground acceleration) is often employed and analyzed.
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