岩土工程学报Issue(7)：1241-1248,8.DOI:10.11779/CJGE201507010
基于小波分析的地震动转动分量研究
Rotational components of ground motion based on wavelet analysis
摘要
Abstract
The rotational components of strong ground motion near faults have differences in the response to the horizontal and vertical pendulums of seismograph, and according to this principle, a method for obtaining the rotational components of ground motion is established using the wavelet anlysis. The local time-frequency characteristics of uncorrected horizontal and vertical earthquake accelerograms using the discrete wavelet transform are discussed. Then a new threshold method, which processes the wavelet coefficients for horizontal earthquake accelerograms, is established to obtain the rotational components of ground motion. Finally, the correctness and precision of the method for obtaining the rotational components using the wavelet analysis is verified through shaking table tests. The results show that the calculated residual tilt displacement of rotational components of ground motion is consistent with the actual one. And the low-frequency part of the horizontal Fourier spectra of ground motion with the rotational component being filtered out is similar to the vertical ones. The correctness of the proposed method is verified through shaking table tests. Compared with the results processed by the Fourier analysis, the wavelet analysis can achieve more accurate results, and it is consistent with the actual situation.关键词
地震动/转动分量/小波分析/阈值处理/傅里叶分析/振动台试验/残余倾斜Key words
ground motion/rotational component/wavelet analysis/threshold procesing/Fourier analysis/shaking table test/residual tilt分类
建筑与水利引用本文复制引用
魏文晖,薛广文,张迪,喻梦..基于小波分析的地震动转动分量研究[J].岩土工程学报,2015,(7):1241-1248,8.基金项目
国家自然科学基金项目（51178362）；武汉市城建委科技资助项目 （）
