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研究了地震地面运动的加速度谱、位移反应谱与富里叶谱之间的对应关系 ,结果表明 ,加速度谱可较好地表现地震动高频部分的特性 ,位移谱可较好地表现地震动低频部分的特性。提出了位移谱特征周期Tgd的概念 ,并以弹性位移谱上Tgd对应的点为基准点对位移谱进行标准化 ,较好地消减了不同地震动对位移谱曲线形状的影响。最后 ,根据多条地震动的计算结果 ,总结了此标准化方法下的平均位移谱的特征 ,为基于位移抗震设计理论的研究提供了基础
The corresponding relationship between the acceleration and displacement response spectra and the Fourier spectrum of ground motion is studied. The results show that the acceleration spectrum can better reflect the characteristics of the high frequency part of ground motion, and the displacement spectrum can better reflect the low frequency of ground motion Part of the characteristics. The concept of the characteristic period Tgd of the displacement spectrum is proposed. The displacement spectrum is normalized by using the point corresponding to Tgd on the elastic displacement spectrum, and the influence of different ground motions on the shape of the displacement spectrum is reduced. Finally, based on the calculation results of multiple ground motions, the characteristics of the average displacement spectrum under this standardized method are summarized, which provides the basis for the study of displacement seismic design theory