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A discrete model for simulating shear strength and deformation behaviour of rockfill material, considering the particle breakage phenomenon

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Abstract

This study focuses on numerical modelling of rockfill material with the discrete element method (DEM). This method was used due to the special features of rockfill material, such as intense particle breakage and high contracting behaviour, which are inherently due to large particle size. Because the DEM models the interaction of separate elements, it is capable of modelling discrete structures of granular materials and particle breakage. The model used in this study uses PFC2D and considers breakable clumps. To validate the presented model for rockfill material, numerical single crushing tests and triaxial tests on the Purulia dam’s material were simulated. Due to the size-dependant crushing strength being involved in the breakage criterion, and also considering particle confinement, size-dependant and stress level-dependant behaviour was successfully simulated on modelled rockfill material. The variation of the sample’s particle grading from before the biaxial tests and after shear failure occurred was reported. The obtained results demonstrate the accuracy of the adopted model and the model’s capability for considering a rockfill material’s strength, deformation and crushing behaviour.

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Authors and Affiliations

  1. Civil and Environmental Engineering Department, Power and Water University of Technology, Tehran, Iran

    Ebrahim Alaei & Ahmad Mahboubi

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  1. Ebrahim Alaei
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  2. Ahmad Mahboubi
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Correspondence to Ahmad Mahboubi.

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Alaei, E., Mahboubi, A. A discrete model for simulating shear strength and deformation behaviour of rockfill material, considering the particle breakage phenomenon. Granular Matter 14, 707–717 (2012). https://doi.org/10.1007/s10035-012-0367-7

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