古田地震水口水电站重力坝强震观测记录HHT分析

英文篇名：HHT Analyses on Observational Recordings of Strong Motion Recorded by Gravity Dam of Shuikou Hydropower Station in Gutian M_L4.6 Earthquake
中文刊名：地震研究
英文刊名：Journal of Seismological Research
作者：方嘉治 ; 赵志伟 ; 蔡宗文 ; 危福泉
英文作者：FANG Jia-zhi ; ZHAO Zhi-wei ; CAI Zong-wen ; WEI Fu-quan(Earthquake Administration of Fujian Province ; Fuzhou 350003 ; Fujian ; China)
中文关键词：重力坝 ; 边际谱 ; Hilbert能量谱 ; 瞬时能量谱
英文关键词：gravity dam ; marginal spectrum ; Hilbert energy spectrum ; instant energy spectrum
出版日期：2012-04-15
机构：福建省地震局;
年：2012
期：02
出版单位：地震研究

摘要

利用HHT变换研究2008年3月6日福建古田ML4.6地震中,水口水电站重力坝强震反应台阵获取的强震反应观测资料的时频特性及重力坝结构动力特性,得到如下结论:(1)强震记录能量集中在0～15Hz频段和10～15s时段;(2)重力坝顺河向主频为3.7Hz。分析结果对认识水库地震近场地震动特性和重力坝地震反应有一定的实际意义。
Using Hilbert Huang Transform(HHT),we studied the time-frequency characteristic of observational data of strong motion recorded by the strong motion response arrays of the gravity dam in Shuikou Hydropower Station in Gutian ML4.6 earthquake and the structural dynamic characteristic of gravity dam.Conclusions were obtained as follows:(1)The frequency of strong motion record energies was centralized between 0 and 15Hz while its time interval was centralized between 10s and 15s.(2)The dominant frequency along the stream direction of concurrent gravity dam was 3.7Hz.The results have certain practical significance for the understanding of the ground motion characteristics in near field of reservoirs earthquake and the seismic response of gravity dam.

引文

公茂盛,谢礼立,连海宁,等.2007.基于HHT的结构强震记录分析研究[J].地震工程与工程振动,12(6):24-29.
    李洪泉,董亮,吕西林.2003.基于小波变换的结构损伤识别与试验分析[J].土木工程学报,36(5):52-57.
    李书进,虞晖,瞿伟廉.2004.基于Hilbert-Huang变换的结构损伤诊断[J].武汉理工大学学报,26(8):44-47.
    王彬,杨润海,郭梦秋,等.2005.昆明高层建筑强震观测记录HHT分析[J].地震研究,28(1):78-81.
    张锦福,蔡辉腾.2009.2008年古田4.1、4.6级地震强震动观测记录[J].华南地震,29(3):111-116.
    张力飞,邢国良.1996.水口水电站重力坝强震反应台阵[J].水力发电,(11):30-32.
    张郁山,梁建文,胡聿贤.2005.应用HHT方法识别刚度渐变的线性SDOF体系的动力特性[J].自然科学进展,5(15):597-603.
    Huang N E,Shen Z,Long S R,et a1.1998.The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary timeseries analysis[J].Proceedings of the Royal Society of London,454(1971):903-995.