Study of Wenchuan Earthquake strong ground motions nonstationarity

Author

Yinfeng, Dong ; Song, Xu ; Junfeng, Guo

fYear

2011

fDate

16-18 Sept. 2011

Firstpage

5492

Lastpage

5494

Abstract

Strong motion records with engineering importance are selected from more than 400 Wenchuan Earthquake records with proper adjustment. Based on this, nonstationarity of intensity and frequency are researched in this paper in order to provide valuable reference for study on disaster mechanism and law of this earthquake. Using a piecewised envelope to analyze the nonstationarity and attenuation relation of intensity, it is found that the stationary segment is significantly longer. Then, the nonstationarity in frequency is discussed based on an exponential decay model of instantaneous frequency. It is shown that the decay speed of frequency is slower and the frequency band is quite wider.

Keywords

earthquakes; geophysical techniques; seismic waves; China; Wenchuan earthquake strong ground motion; attenuation intensity relation; disaster mechanism; earthquake frequency nonstationarity; earthquake intensity nonstationarity; instantaneous frequency exponential decay model; nonstationarity intensity relation; Attenuation; Earthquakes; Educational institutions; Electronics packaging; Estimation; Frequency modulation; Laboratories; Attenuation Relation; Earthquake Ground Motion; Modeling; Nonstationary Properties; Wenchuan Earthquake;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Control Engineering (ICECE), 2011 International Conference on

Conference_Location

Yichang

Print_ISBN

978-1-4244-8162-0

Type

conf

DOI

10.1109/ICECENG.2011.6058498

Filename

6058498