Non-Stationary Characteristics of Near-Fault Strong Motions During the 2008 Wenchuan Earthquake

详细信息   

• 责任者：Xie Junju (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China） ; Wen Zengping
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54（3）
• 关键词：汶川地震2008 ; Wenchuan earthquake 2008 ; 地震动 ; ground motion ; 龙门山断裂带 ; Longmenshan Fault Zone
• 页码：p.728-736
• 图表：9 illus., 33 refs.
• 分类号：0500
• 出版序号：20120096
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

Using near-fault strong motions from Wenchuan earthquake recorded by the National Strong Motion Observation Network System of China as database, non-stationary characteristics of amplitude and frequency content of strong motions from 2008 Wenchuan earthquake are investigated, and the reason for intense non-stationary characteristics of near-fault strong motions are analyzed. According to this study, non-stationary characteristics of near-fault strong motions are strongly affected by fault rupture mechanism, location of strong motion stations and site conditions. A noticeable phenomenon is shown that the period of recorded velocity pulse in Wenchuan earthquake is much larger than the Chi-Chi and Kobe earthquake, as a result of a much larger magnitude for this event.