土石坝坝坡模型振动台破坏试验的数值验证

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Abstract The seismic stability of earth-rock dam is studied through shaking table test and numerical simulation. The dynamic behavior，failure mode，stability and reinforced performance of the soil dam slope during earthquakes are discussed. An elastoplastic analytical method is applied to simulating and analyzing the dynamic failure process of soil dam slope under earthquake. The permanent displacements of earth-rock dam in different cases are studied. In addition，the stability of dam slope，the depth of slip surface and the effectiveness of reinforcement are investigated by using the quasi-static method. The comparison between the calculated results and results obtained from shaking table tests shows that they are close and definitely verified each other. The study also shows that the top of dam is the vulnerable part；and cracks normally appear near this part under earthquake. The reinforcement and the gentle slope also can decrease the permanent displacement of dam slope. The reinforcement can obviously enhance the overall stability of dam without increasing the volume of the soil dam. The reinforcement has more advantages than the gentle slope.

Key words： numerical simulation earth-rock dam slope shaking table test dynamic failure slip surface

Received: 16 January 2010

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http://www.rockmech.org/EN/Y2011/V30/IS1/2938

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