|Table of Contents|

Characteristics of Slope Seismic Response Under Strong Earthquake in Hilly Morphologic Area—The Case of Changning County in Sichuan Province, China(PDF)

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

Issue:
2020年第04期
Page:
540-551
Research Field:
应用地球物理
Publishing date:

Info

Title:
Characteristics of Slope Seismic Response Under Strong Earthquake in Hilly Morphologic Area—The Case of Changning County in Sichuan Province, China
Author(s):
WANG Yun-sheng;  MING Wei-ting;  LIU Jiang-wei;  ZHAO Bo
(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China)
Keywords:
seismic response;  slope;  Changning Ms 6.0 earthquake;  hilly;  topography amplification effect;  Fourier spectrum;  acceleration response spectrum;  Sichuan
PACS:
P642.27
DOI:
10.19814/j.jese.2020.01014
Abstract:
There are many studies on seismic response of high slope in deep-cut valley morphologic area, but the research is rarely found in hilly morphologic area. It is of great significance to study seismic response of the inclined slope in this area to reveal the dynamic mechanism of abundant secondary mountain disasters caused by Changning Ms 6.0 earthquake. The strong earthquake instrument was placed in different parts of the typical slope in hilly morphologic area of Changning county, Sichuan province, and more than 40 aftershocks were captured. The data of typical aftershocks were processed by SeismoSignal software to analyse the peak acceleration, Arias intensity, Fourier spectrum and acceleration response spectrum, then the local site effect was analysed by horizontal/vertical spectrum ratio(HVSR)method. Finally, the seismic response of slopes in hilly morphologic area was compared with that in deep-cut valley morphologic area. The results show that the peak acceleration can reach 4.171 m·s-2 with the maximum displacement of 0.008 05 m at the top of slope; when the peak acceleration is greater than 1.0 m·s-2, Arias intensity increases sharply; the geological disasters caused by the local topography amplification effect mainly consist of ridges and small collapse, and mountain resonance possibly occurs in the middle and upper of slope at the low frequency of 2-5 Hz. The above researches reveal the high-amplification effect of inclined slope in sand and shale, and provide a large amount of seismic monitoring data for the susceptibility of earthquake-induced mountain disasters.

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Last Update: 2020-07-27