关于Nakamura方法有效性的讨论  

Discussion on validation of Nakamura's technique

作　　者：卢滔[1] 周正华[2] 周雍年[2] 仲维照[2] 

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》2006年第1期43-48,共6页Earthquake Engineering and Engineering Dynamics

基　　金：地震科学联合基金项目(105023)

摘　　要：1989年,日本学者中村(Nakamura)提出了一种基于同一地表测点地脉动水平分量与竖向分量傅里叶幅值谱比值(H/V ratio)来估计场地特征的方法,即所谓的Nakamura方法。该方法及其成立的两个前提条件近些年一直是国内外研究人员争议的对象。本文通过唐山响嘡局部场地影响台阵获取的脉动与弱震加速度记录的统计分析和对比,对该方法及其成立的两个前提条件的合理性进行了讨论,并提出了一些可供参考的建议。In 1989, a method called Nakamura＇s technique, which uses a horizontal-to-vertical Fourier spectrum ratio （ H/V ratio） of microtremor to estimate the dynamic characteristics of site, was introduced by a Japanese scholar Nakamura. However, the validation of Nakamura＇s technique and its two basic assumptions has been discussed for many years. In this paper, based on microtremor records and earthquake records from Xiangtang Array, the statistical analysis of H/V ratio and transform function is done, and a comparison is made between these two results. Then the rationality of Nakamura＇s technique and its two basic assumptions are analyzed and discussed, and some suggestions are proposed in this paper.

关 键 词：Nakamura方法 传递函数 H/V谱比 

分 类 号：P315.916[天文地球—地震学]