DOI: 10.1007/s11069-020-04083-9
论文题名: Simulation of the Jiuzhaigou, China, earthquake by stochastic finite-fault method based on variable stress drop
作者: Dang P. ; Liu Q. ; Song J.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 103, 期: 2 起始页码: 2295
结束页码: 2321
语种: 英语
中文关键词: Dynamic corner frequency
; Jiuzhaigou earthquake
; Response spectra
; Site amplification
; Stochastic finite-fault method
英文关键词: amplification
; earthquake event
; earthquake magnitude
; fault zone
; finite element method
; frequency analysis
; ground motion
; numerical model
; slip
; stochasticity
; China
; Jiuzhaigou National Park
; Sichuan
英文摘要: An improved stochastic finite-fault method was used to simulate the Mw 6.6 earthquake that occurred on August 8, 2017, in Jiuzhaigou, Sichuan, China. A variation of the stochastic finite-fault method, considering the dynamic corner frequency, was used to overcome the corner frequency. It explains the effect of a given slip distribution on the corner frequency of each subfault. A comparison of the response spectra (damping ratio 5%), spectral ratio (simulated values/observed values), and model deviation demonstrated that the improved corner frequency performs well for the whole periods, especially in short periods from 0.2 to 1 s. Similarly, the revised duration model and the site-amplification factor were applied to simulate the ground motion during the Jiuzhaigou earthquake, and then the response spectra were obtained. The duration of the nine near-field station recordings matched well with the simulated ground motions, and the peak ground acceleration (PGA) of most of the stations matched well with the observed PGA. In the short periods (T < 1 s), a small difference is observed between the simulated response spectra and the observed spectra for most of the stations. However, the response spectra were overestimated within the period range (0.05–10 s). Generally, the simulated ground motions obtained by using the improved model matched well with the observed ground motions, which could be considered the basis for earthquake-resistant design during the postdisaster recovery and the structural dynamic analysis of the Jiuzhaigou region. © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168448
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration, Institute of Engineering Mechanics, China Earthquake Administration, No. 29 Xuefu Road, Harbin, Heilongjiang Province 150080, China; School of Civil Engineering, Suzhou University of Science and Technology, No. 1701 Binhe Road, Suzhou, Jiangsu Province 215011, China
Recommended Citation:
Dang P.,Liu Q.,Song J.. Simulation of the Jiuzhaigou, China, earthquake by stochastic finite-fault method based on variable stress drop[J]. Natural Hazards,2020-01-01,103(2)