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《World Earthquake Engineering》 2007-02
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General laws of dynamic responses of the high slopes under horizontal dynamic input

QIU Ren-dong SHI Yu-cheng FU Chang-hua(Lanzhou Institute of Seismology,Lanzhou Base of Institute of Earthquake Prediction,China Earthquake Administration,Lanzhou 730000,China)  
Horizontal seismic excitation in high rock slope is a matter of most concerned in engineering practice.Though lots of numerical simulations,dynamic responses of the high rock slopes are comprehensively studied in this paper,and the general laws of the coefficient isoline for the acceleration,velocity and displacement of the slope section are obtained.Given a certain material slope,if the height of the slope is fixed,the acceleration,velocity and displacement linearly lessen with the slope angle enlarging;if the slope angle is fixed,the acceleration,velocity and displacement increase with the slope height raising;the dynamic response laws of the acceleration,velocity and displacement are affected by the mechanical property of the underlying rock, besides the dynamic response laws of the acceleration,velocity are evidently affected by the period properties of the dynamic loads.At the same time,the rhythm of the slopes appears in the horizontal direction,and the acceleration,velocity and displacement of the slopes are enlarged near edge of the slopes,the distribution form of the coefficient isoline of acceleration,velocity and displacement in the slope section is remarkably affected by the slope angle.The results indicate the dynamic response characters of the high rock slopes,and provide theoretical basis and practical reference for the high rock slope engineering.
【Fund】: 国家社会公益研究专项(2002DIB20062);; 兰州地震研究所青年基金(2006255);; 地震科学联合基金(103101)联合资助
【CateGory Index】: TU43
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