基线漂移对长周期反应谱的影响

英文篇名：The effect of baseline offset to response spectra in long period
中文刊名：黑龙江大学自然科学学报
英文刊名：Journal of Natural Science of Heilongjiang University
作者：耿淑伟 ; 陶夏新
英文作者：Geng Shuwei1 ; Tao Xiaxin2(1.Hefei University of Technology and Engineering ; School of Civil Engineering ; Hefei 230009 ; China ; 2.Institute of Engineering Mechanics ; China Earthquake Administration ; Harbin 150080 ; China)
中文关键词：数字强震仪 ; 强震记录 ; 基线漂移 ; 影响
英文关键词：strong motion record ; strong motion seismograph ; baseline offset ; effect
出版日期：2007-10-25
机构：合肥工业大学土木建筑工程学院,中国地震局哈尔滨工程力学研究所合肥230009,哈尔滨150080
年：2007
期：05
出版单位：黑龙江大学自然科学学报

摘要

采用Hilbert-Huang变换,对数字强震仪记录进行了分析,得到了几个典型记录的最低频固有模态函数(IMF),比较了常规处理记录和去除最低频IMF的记录加速度反应谱的差别,这种差别很小。据此得出了记录基线漂移对长周期反应谱的影响很有限的结论,指出数字化强地震动记录在长周期段是可靠的,设计反应谱可向长周期扩展。
Hilbert-Huang Transform is adopted to deal with strong motion records,the lowest frequency inherent mode function(IMF) of some representative records are drawn out.The difference is very small between general records and those without the lowest frequency IMF.The result are drawn that the effect of baseline setoff is finite to response spectra in long period,the digital strong motion records are credible in long period,the design response spectra can be extended to longer period.

引文

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