节点文献
昆明地震动强度(烈度)观测台场地动力特征研究
Study on Site Dynamic Characueristics of Strong Motion Stations in Kunming,Yunnan
【摘要】 使用单点地脉动谱比法(Nakamura方法),对3个昆明地震动强度(烈度)观测台的基墩和场地自由表面进行了谱比分析,通过分析谱比的卓越周期和放大因子,研究了基墩对地震波的影响和Nakamura方法对地层分析的可靠性。结果表明(1)基墩对低频部分基本没有影响,对高频部分稍微有放大;(2)Nakamura方法对地层的分析和钻孔法所得的结果在某些层位较一致。
【Abstract】 We used Nakamura Method to analyze the spectra ratio of horizontal to vertical directions between concrete pad and earth ground at three strong motion stations in Kunming, studied the effect of concrete pad on seismic motion and the reliability of using Nakamura Method to analyze strata. The result shows: (1) the concrete pads don’t influence the low frequency part of ground motion, but magnify the high frequency part slightly; (2) the results from Nakamura Method and borehole surveying are consistent at some bed depths.
【关键词】 地脉动;
傅立叶谱比;
Nakamura方法;
场地特征;
卓越周期;
昆明;
【Key words】 microtremor; Fourier spectrum ratio; Nakamura method; site characteristic; predominant period; Kunming;
【Key words】 microtremor; Fourier spectrum ratio; Nakamura method; site characteristic; predominant period; Kunming;
- 【文献出处】 地震研究 ,Journal of Seismological Research , 编辑部邮箱 ,2006年03期
- 【分类号】P315.6
- 【被引频次】2
- 【下载频次】41