Analysis of the relations between slope failure distribution and seismic ground motion during the 2008 Wenchuan earthquake

被引:19
作者
Guo, Deping [1 ,2 ,3 ]
He, Chuan [1 ]
Xu, Chong [4 ]
Hamada, Masanori [2 ]
机构
[1] Southwest Jiaotong Univ, Sch Civil Engn, Minist Educ, Key Lab Transportat Tunnel Engn, Chengdu 610031, Peoples R China
[2] Waseda Univ, Dept Civil & Environm Engn, Shinjuku Ku, Tokyo 1698555, Japan
[3] Sichuan Railway Investment Grp Co Ltd, Chengdu 610041, Peoples R China
[4] Chinese Earthquake Adm, Inst Geol, Key Lab Act Tecton & Volcano, Beijing 100029, Peoples R China
基金
中国国家自然科学基金;
关键词
Wenchuan earthquake; Slope failure distribution; Seismic ground motion; Attenuation relation; W; 7.9; WENCHUAN; INDUCED LANDSLIDES; RUPTURE PROCESS; ATTENUATION; SICHUAN; CHINA;
D O I
10.1016/j.soildyn.2015.02.001
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The 2008 Wenchuan earthquake with M(w)7.9 occurred at Yingxiu County in Longmenshan thrust fault belt, southwest China, having triggered a huge amount of slope failures. This paper applied a detailed inventory with more than 190,000 slope failures and strong ground motion records of 187 seismic stations to analyze the qualitative and quantitative relations between slope failure distribution and seismic parameters. The results revealed that slope failure distribution was exponentially decreased with the increment of epicentral distance and distance from surface fault rupture; peak ground acceleration (PGA) on the hanging wall side was apparently larger than that on footwall side. Linear correlation between concentration of slope failures (LNC) and the percentage of the area affected by slope failure (LAP) and PGA was demonstrated by statistical analysis, which revealed that 0.18 similar to 0.21 g horizontal PGA was the threshold value of the occurrence of slope failure. Furthermore, this paper presented an empirical model for the attenuation relation of slope failure distribution. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:99 / 107
页数:9
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