应用HHT方法从竖向地震动记录识别场地液化的物理过程  

Identification of physical process of site liquefaction from vertical seismic recordings via the method of HHT

作　　者：胡聿贤[1] 张郁山[1] 梁建文[2] 

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]天津大学土木工程系,天津300072

出　　处：《地震工程与工程振动》2004年第3期1-11,共11页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(批准号:50278090);教育部留学回国人员科研启动基金项目

摘　　要：利用HHT方法分析1987年美国SuperstitionHills地震在Wildlife场地上获得的地震加速度记录,深入地论述了实际地震中土层液化对竖向地震动非平稳特性的影响,进而达到了应用HHT方法从地震动记录识别场地液化物理过程的目的。Via the method of Hilbert-Huang Transform (HHT), this article analyzed the seismic-acceleration recordings obtained on the Wildlife site during the Superstition Hills earthquake of USA, which occurred in 1987. By doing so, the article demonstrated in depth the effects that were imposed by the liquefaction of soil layers during the real-life earthquake on the non-stationarity of vertical seismic recordings, and thus, gained its ends of identifying the physical process of site liquefaction from seismic recordings by application of HHT method.

关 键 词：液化 竖向地震动记录 HHT方法 时频分析 瞬时频率时程 

分 类 号：P315.98[天文地球—地震学]