The ratio of vertical and horizontal predominant period is 0.7-0.9, so independent characteristic period of vertical design response spectrum should be defined.
竖向与水平向地震动分量卓越周期的比值在0.7 - 0.9之间，竖向设计反应谱的特征周期应有单独规定。
But these researches all established on the stage of elasticity analysis, the same characteristic period of response spectrum was used for the stage of elastoplastic analysis.
但这些研究多建立在弹性阶段分析的基础之上，对于弹塑性阶段的选波采用了与弹性阶段相同的特征周期。
A new method of estimating characteristic parameters for continuous spectrum of response signal of damped free vibration is presented in this paper.
针对自由衰减振动信号的连续谱，提出了一种估计特征参数的方法。
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