强震记录中的“尖刺”现象初步研究

英文篇名：The preliminary study on the “spike” in strong motion records
中文刊名：土木工程学报
英文刊名：China Civil Engineering Journal
作者：周宝峰 ; 温瑞智 ; 谢礼立
英文作者：Zhou Baofeng ; Wen Ruizhi ; Xie Lili ; Institute of Engineering Mechanics ; China Earthquake Administration ; Heilongjiang Construction Group ; Harbin Institute of Technology
中文关键词：强震记录 ; 峰值加速度 ; 尖刺 ; 反应谱
英文关键词：strong motion records ; peak ground motion acceleration ; spike ; response spectrum
出版日期：2014-12-15
机构：中国地震局工程力学研究所;黑龙江省建设集团;哈尔滨工业大学;
年：2014
期：S2
出版单位：土木工程学报

摘要

选取国内外典型地震的强震记录分析,发现一些具有尖刺现象的记录,研究"jerk"方法在识别尖刺中的应用,并使用统计方法重点研究峰值加速度中所存在的尖刺现象,初步分析其产生的原因,给出识别和处理尖刺的方法 ,并研究尖刺对于加速度、速度、位移、加速度傅里叶幅值谱以及相关反应谱的影响。研究结果表明:1造成尖刺现象的原因很多,仅通过强震记录难以判断;2"jerk"方法在识别复杂的尖刺时具有一定的局限性;3比值法可初步识别复杂的尖刺;4尖刺的处理方法会影响到绝对加速度反应谱的计算。
Strong motion records of the typical earthquake are selected in the article, and "spikes" are found in certain records. The "jerk"method is used to identify the "spike". And the "spike" in the peak ground motion is further studied. The causes of the spikes are summarized, then the method to identify and modify the spikes is given. The research on the effect of the "spike" on the acceleration, velocity, displacement, acceleration Fourier amplitude spectrum and the associated response spectrum is carried out. The results showed that: 1 to the specify record, it's difficult to give the reasons leading to the "spike"; 2 there are some limitations in the identify of some complicated spikes for the "jerk" method; 3 ratio method can preliminary identify the "spike"; 4 the identification method for "spikes" will affect the absolute acceleration response spectrum.

引文

[1]Boore D M,Bommer J J.Processing of strong-motion accelerograms:needs,options and consequences[J].Soil Dynamics and Earthquake Engineering,2005,25:93-115
    [2]Bommer J J.Boore D M.Guidelines and recommendations for strong-motion record processing and commentary[R].Strong-Motion Record Processing Working Group,2005
    [3]中国地震局震害防御司.汶川8.0级地震未校正加速度记录[R].北京:地震出版社,2008(Earthquake Disaster P r e v e n t i o n,C h i n a S e i s m o l o g i c a l B u r e a u.We n c h u a n8.0 earthquake uncorrected acceleration records[R].Beijing:Seismological Press,2008(in Chinese))
    [4]李小军,温瑞智,于海英.汶川8.0级地震余震固定台站观测未校正加速度记录[R].北京:地震出版社,2009.(Li Xiaojun,Wen Ruizhi,Yu Haiying.Wenchuan 8.0earthquake aftershock observation stations uncorrected fixed acceleration records[R].Beijing:Seismological Press,2009(in Chinese))
    [5]李小军.汶川8.0级地震余震流动台站观测未校正加速度记录[R].北京:地震出版社,2009(Li Xiaojun.Wenchuan8.0 earthquake aftershock observation stations uncorrected mobile acceleration records[R].Beijing:Seismological Press,2009(in Chinese))
    [6]周宝峰.强震观测中的关键技术研究[D].哈尔滨:中国地震局工程力学研究所,2012(Zhou Baofeng.Some key issues on the strong motion observation[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration,2012(in Chinese))
    [7]谢礼立,于双久,等.强震观测与分析原理[M].北京:地震出版社,1982