论文部分内容阅读
本文运用主成份法对115个强地震运动资料进行了分析。对于每一个样本抽取了与烈度有关的十个随机变量。分析结果表明,地震记录中的速度、位移、加速度的峰值是最主要的因素,水平速度的峰值尤其重要,其次是持续时间,再次则是谱宽度。最主要的两个成份的贡献率占75％,而第三个成份的贡献率只占8％,这些结果,对于发展合理而又实用的抗震设计方法,有效地运用强震记录资料,都是十分有用的。
In this paper, 115 strong seismic motion data are analyzed by principal component method. Ten random variables related to intensity were extracted for each sample. The results show that the peak values of velocity, displacement and acceleration are the most important factors in seismic records. The peak of horizontal velocity is especially important, followed by the duration and again the spectral width. The contribution of the most important two components is 75%, while the contribution of the third component is only 8%. These results are effective for the development of rational and practical seismic design methods and the effective use of strong earthquake records Very useful.