Dynamic stability analysis of three dimensional slopes under seismic loads#br#
ZOU Ye1,2,GUO Mingwei1,WANG Shuilin1,GE Xiurun1
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;2. University of Chinese Academy of Sciences,Beijing 100049,China)
Abstract:Dynamic stability analysis of slopes is a difficult problem in the field of geotechnical engineering. In order to apply the vector sum method(VSM) in dynamic stability analysis of a three-dimensional slope,a method which combines VSM with dynamic finite element method was developed,and an example of a three-dimensional uniform slope was analysed. The method was used to analyse the dynamic stability of two typical talus deposits. The dynamic analysis of the slope shows that the terrain has great effects on the dynamic response of the three-dimensional slope and that the absorption effect of talus deposit on the seismic wave is pretty obvious. Under the action of earthquake scale 6.5 (the peak acceleration is 0.2 g),the average safety factors of talus deposit Q1 and Q2 are 1.47 and 1.23 respectively,while the minimum values are 1.33 and 1.18 respectively. The slope was thus considered stable under this seismic load.
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