DEM modeling of shaking table model test for CFRD considering particle shape

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (24) : 99-105.

JING Xiangyang1，YANG Lifu2,3，MA Gang3，ZHOU Wei3

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Abstract

Using the finite element mesh generation method, a method of modeling convex or concave polygonal particles was proposed.Particles with more realistic shapes were generated by the control of parameters, and simulations of complex shaped particles including concave polygons were realized.DEM simulations of shaking table model test for concrete faced rock-fill dam (CFRD) in irregularly shaped grain were presented in this work and the dynamic characteristic were revealed from perspective of micro mechanics.The study results indicated that the concrete face slides from the base during earthquake.As the peak acceleration increasing, the dip angles of sliding plane for the grains in the downstream of CFRD increase and the crest settlement and skeleton dilatation become more intense.The major principal direction of normal contact forces was closed to the vertical before earthquake while the angle shifts to the downstream after earthquake.The anisotropy of normal contact forces increases with peak acceleration.Under the same initial fabrics, the average friction mobilization for CFRD was unvaried and irrelevant to the acceleration input.

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discrete element method / particle shape / concrete faced rock-fill dam / shaking table test

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JING Xiangyang1，YANG Lifu2,3，MA Gang3，ZHOU Wei3. DEM modeling of shaking table model test for CFRD considering particle shape[J]. Journal of Vibration and Shock, 2018, 37(24): 99-105

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