|Table of Contents|

Response Characteristics of Slope Seismic to Gongxian Ms 5.4 Earthquake in Sichuan, China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2019年第05期
Page:
613-622
Research Field:
应用地球物理
Publishing date:

Info

Title:
Response Characteristics of Slope Seismic to Gongxian Ms 5.4 Earthquake in Sichuan, China
Author(s):
WANG Yun-sheng LIU Jiang-wei ZHAO Bo LUO Yong-hong MING Wei-ting LUO Yue JIN Gang ZHOU Yu-hang
(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China)
Keywords:
Gongxian Ms 5.4 earthquake Changning Ms 6.0 earthquake slope slope stability site amplification response spectrum Sichuan
PACS:
P642.27
DOI:
-
Abstract:
Gongxian Ms 5.4 earthquake is the third largest aftershock after Changning Ms 6.0 earthquake, and numerous landslides and rockfalls are triggered in the earthquake area. In order to detect the influence of seismic response on slope stability, the monitoring points at different positions of the slope close to the source were arranged to obtain the seismic motion parameters and related variation rules. The results show that seismic site amplification in SN-direction is obvious larger than that in EW-direction, whose displacement is also largest, especially for the soil monitoring point(7.42 mm), it is consistent with the strong SN-direction shaking during the earthquake; the soil could produce more obvious site amplification than bedrock by comparing PGA and Arias intensity of all monitoring points, and it could produce stronger dynamic condition; the resonance frequency of bedrock mainly concentrates on 2-5 Hz, and the resonance frequency decreases with the increase of altitude, the Arias intensity of mountain top(3# monitoring point)is obviously stronger than that of mountain foot(1# monitoring point); according to the comparison of seismic design response spectrums and monitoring response spectrums, the soil and bedrock could occur geohazards easily, which threaten to building stability.

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Last Update: 2019-09-19