| Characteristics of frequency content of near-fault ground motions during the Chi-Chi earthquake |
| |
| 作者姓名： | 徐龙军 谢礼立 |
| |
| 作者单位： | School of Civil Engineering Harbin Institute of Technology Harbin 150090 China，School of Civil Engineering Harbin Institute of Technology Harbin 150090 China，Institute of Engineering Mechanics China Earthquake Administration Harbin 150080 China |
| |
| 基金项目： | Heilongjiang Natural Science Frundation Project (ZGJ03-03)，the Researth Fund for the Doctoral Program of Higher Education of China (20030213042). |
| |
| 摘 要： | Introduction The dynamic response of structural systems subjected to earthquake ground shaking is sig-nificantly affected by the frequency content of input ground motions. When the frequency content of a predominant earthquake ground motion closely matches the natural period of a structural sys-tem, the dynamic response is significantly enhanced and thus may cause severe damage (Chopra, 1995). Therefore, it is of great importance to evaluate the frequency content of ground motions. In recent …
|
| 收稿时间： | 26 July 2004 |
| 修稿时间： | 4 July 2005 |
Characteristics of frequency content of near-fault ground motions during the Chi-Chi earthquake |
| |
| XU Long-jun,XIE Li-li.Characteristics of frequency content of near-fault ground motions during the Chi-Chi earthquake[J].Acta Seismologica Sinica(English Edition),2005,18(6):707-716. |
| |
| Authors: | XU Long-jun XIE Li-li |
| |
| Institution: | 1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China |
| |
| 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. |
| |
| Keywords: | frequency content directivity effect hanging-wall effect Chi-Chi earthquake |
| 本文献已被 CNKI 万方数据 SpringerLink 等数据库收录！ |
