地震学报（英文版）2005，Vol.18Issue(6)：707-716,10.
Characteristics of frequency content of near-fault ground motions during the Chi-Chi earthquake
Characteristics of frequency content of near-fault ground motions during the Chi-Chi earthquake
摘要
Abstract
The frequency content of earthquake ground motion is very important because it affects the dynamic response of structural systems. In the paper, we use five scalar parameters (the response spectral predominant period Tp,smoothed spectral predominant period To, Fourier amplitude spectral mean period Tm, equivalent pulse period Tv,and the pseudo-velocity spectral predominant period Tpv) reflecting the characteristics of frequency content of strong ground motion to examine the near-fault three-component motions during the 1999 Chi-Chi earthquake. The result indicates that the frequency content of near-fault motions at the Hanging wall is less than that at the foot wall;Tp shows a smaller value than that of To and Tm and it emerges a reverse relation of three-component motions as compared with that of To and Tm; Tv and Tpv of the near-fault motions at the north end of the rupture display a similar trend to that generated by the rupture directivity effect of strike-slip faulting. We therefore conclude that these observations are useful in the formulation of near-fault design spectra for seismic codes and in zoning studies in seismic risk.关键词
frequency content/directivity effect/hanging-wall effect/Chi-Chi earthquakeKey words
frequency content/directivity effect/hanging-wall effect/Chi-Chi earthquake分类
天文与地球科学引用本文复制引用
XU Long-jun,XIE Li-li..Characteristics of frequency content of near-fault ground motions during the Chi-Chi earthquake[J].地震学报（英文版）,2005,18(6):707-716,10.基金项目
Heilongjiang Natural Science Frundation Project (ZGJ03-03) and the Researth Fund for the Doctoral Program of Higher Education of China (20030213042). （ZGJ03-03）
