地震学报Issue(1)：138-145,8.DOI:10.11939/jass.2016.01.014
基于强震动记录确定的场地卓越周期
Determination of site dominant period based on strong motion records
摘要
Abstract
In this paper,we introduce three methods for determining dominant period based on the strong motion records,they are ① the Fourier spectral analysis method of surface records;② horizontal/vertical Fourier spectral ratio method; ③ surface/underground Fourier spectral ratio method. Several hundred strong motion records from two bedrock stations and two stations on site class Ⅲ in the KiK-net strong motion observation network in Japan are used to analyze the site dominant period.It is concluded that,on the bedrock site,the dominant frequency obtained from the three methods are scattered due to the hard rock site condition which has little effect on the ground motion.On the soil site,the overlying soil has great effect on the ground motion,and accurate values of dominant period can be obtained from the three methods.The domi-nant frequency from the surface/underground Fourier spectral ratio method is more accurate than that from the surface horizontal/vertical Fourier spectral ratio method whose result is uncertain on some soil sites.关键词
强震动/场地条件/傅里叶谱比/卓越周期Key words
strong motion/site condition/Fourier spectral ratio/dominant period分类
天文与地球科学引用本文复制引用
陈永新,迟明杰,李小军..基于强震动记录确定的场地卓越周期[J].地震学报,2016,(1):138-145,8.基金项目
国家国际科技合作项目（2012DFG20510）和环保公益性行业专项（201309056）共同资助． （）
