地震工程学报2017，Vol.39Issue(5)：836-842,7.DOI:10.3969/j.issn.1000-0844.2017.05.0836
基于小波变换的层间隔震结构地震响应分析
Seismic Response Analysis of Inter-story Isolation Structures Based on Wavelet Transformation
摘要
Abstract
In this study,ground motion acceleration time history was decomposed into multi-band wavelet components using the wavelet multi-resolution analysis method,and a dynamic response formula for an inter-story isolation structure under earthquake action was deduced using the complex modal method.The resulting seismic signals and displacement energies in a distinct frequency channel are discussed.The impact of earthquake energy distribution in the time-frequency domain on structural response was analyzed using wavelet time-frequency analysis tools,which provide a method of analyzing the nonlinear response of inter-story isolation structures.Finally,the elastic and elastoplastic responses of a typical inter story isolation structure under earthquake excitation are analyzed using wavelet analysis.The results show that the elastic response can be the superposed seismic response of each wavelet component.Therefore,energy concentration of earthquake ground motion in the time domain can cause an adverse effect on inter-story isolation structures.关键词
小波变换/层间隔震结构/多分辨率分析/复模态法/地震动非平稳性Key words
wavelet transform/inter-story isolation structure/multi-resolution analysis/complex mode method/ground motion non stationarity分类
建筑与水利引用本文复制引用
张尚荣,杜永峰,惠迎新,毛明杰..基于小波变换的层间隔震结构地震响应分析[J].地震工程学报,2017,39(5):836-842,7.基金项目
宁夏自然科学基金(NZ1629) （NZ1629）
国家基金委项目(51578274) （51578274）
宁夏大学引才项目(BQD2015004) （BQD2015004）
