郑州大学学报（工学版）2012，Vol.33Issue(4)：18-22,5.DOI:10.3969/j.issn.1671-6833.2012.04.005
基于移动平均分解的近断层地震动弹性反应谱研究
Study on Elastic Response of Structures to Near-fault Ground Motions Through Record Decomposition
摘要
Abstract
The design response spectrum in seismic design code is the result of a large number of midfield and far-field seismic records statistical regression analysis. As a result of the lack of observation data, the percent of near-field seismic records is small , which leads to the insufficient consideration of the frequency spectrum characteristic of near field ground motions. Near-fault ground motions have some important characteristic that make them different from far-fault ground motions. High-frequency components and low-frequency pulses of near-fault ground motions are among notable specifications. In this paper, a moving average filtering has been designed to decompose the near-fault ground motions into two components having different frequency contents: low-frequency pulses component and high-frequency component. The method is applied to decompose a few selected near-fault records and the elastic response of structure is examined through their response to the decomposed parts. The results emphasizes that for single pulse record the pulse component can effectively represent the response of the structure under the original records . But for multi-pulse record, owing to the existence of one or more peaks, the pulse component can not effectively represent the structure response under the original records. The sole consideration of the pulse component and ignoring the high frequency component is very bad for short cycle structure.关键词
近断层地震动/低频脉冲/高频部分/移动平均滤波器/弹性反应谱Key words
near-fault ground motion/ low-frequency pulse/ high-frequency component/ moving average filter/ elastic response spectra分类
天文与地球科学引用本文复制引用
赵志航,车伟,冯群..基于移动平均分解的近断层地震动弹性反应谱研究[J].郑州大学学报（工学版）,2012,33(4):18-22,5.基金项目
中央高校基本科研业务费专项基金资助(2011CXY037) （2011CXY037）
