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《Journal of Engineering Geology》 2010-01
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MONITORING OF SLOPE SEISMIC RESPONSE DURING AFTERSHOCKS OF WENCHUAN EARTHQUAKE IN QINGCHUAN COUNTY

LUO Yonghong WANG Yunsheng WANG Fuhai DENG Xi(State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection,Chengdu University of Technology,Chengdu 610059)  
From May 13 to 27,2009,the seismic responses of a slope during four aftershocks of the 2008 Wenchuan Earthquake were monitored with the 941-B ultra-low-frequency vibrometer and G01 general-purpose instrument.The slope located at Wei Ganliang in Qingchuang county.The micro-seismic monitoring shows that relative to the 805 m elevation at the Wei Ganliang Mountain,the measured peak accelerations of ground motion at the 875 m elevation in the horizontal EW direction and vertical direction had the tendency of reduction.However,the measured peack accelerations in the horizontal NS direction had a significant multiplier effect.The magnification was up to 7 to 8 times.The main frequency of the amplitude spectrum focused on the low frequency range between 2.0 and 4.0 Hz.Analysis shows that the epicenter located on the north side of the NEE striking Qingchuan-Pingwu fault.Along the direction of seismic wave propagation,the slope has significant an amplification effect.
【Fund】: 中国地调局项目资助:“汶川地震地质灾害调查评价”—川西深切河谷斜坡地震评价技术研究 编号1212010914010
【CateGory Index】: P315.2
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