Three-dimensional discrete element simulation of random breaking strength and size effect in single particle splitting test of rockfill

ZHOU Meng-jia; WEN Yan-feng; DENG Gang; WANG Yun-jia; SONG Er-xiang

doi:10.16285/j.rsm.2018.1678

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Three-dimensional discrete element simulation of random breaking strength and size effect in single particle splitting test of rockfill

更新时间：2026-06-25

- Three-dimensional discrete element simulation of random breaking strength and size effect in single particle splitting test of rockfill
- Vol. 40, Issue S1, Pages: 503-510(2019)
- 作者机构：
  
  1. 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京,100048
  2. 清华大学土木工程系,北京,100084
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2018.1678
  CLC： TU452
- Online First：18 August 2019，
  
  Published：2019
- 稿件说明：
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ZHOU Meng-jia, WEN Yan-feng, DENG Gang, et al. Three-dimensional discrete element simulation of random breaking strength and size effect in single particle splitting test of rockfill[J]. 2019, 40(S1): 503-510.
DOI：

ZHOU Meng-jia, WEN Yan-feng, DENG Gang, et al. Three-dimensional discrete element simulation of random breaking strength and size effect in single particle splitting test of rockfill[J]. 2019, 40(S1): 503-510. DOI： 10.16285/j.rsm.2018.1678.

摘要

堆石单颗粒形状不规则，强度随机且存在尺寸效应，开发堆石颗粒模型是开展堆石料颗粒流室内数值试验的基础。文中提出一种随机裂缝模型，并对模型参数的设置进行分析讨论，模型在合理的参数设置的情况下能反映真实堆石颗粒的脆性劈裂、强度随机性Weibull分布、强度尺寸效应，是深入开展筑坝材料破碎及缩尺效应颗粒流模拟分析的前提。单颗粒数值试验表明，颗粒形状对破碎模式影响显著；在相同岩性材质和裂缝分布情况下形状对颗粒强度影响较大；颗粒越不规则，其强度离散性越大。

Abstract

The single particle shape is irregular in the rockfill

which is characterized as random strength and size effect. The development of rockfill particle model is the basis of particle flow simulation in laboratory tests of rockfill materials. Based on the micro-crack propagation mechanism of particle breakage

a random crack model with three-dimensional shape is carefully proposed in this paper. Furthermore

the parameters of model are analyzed and discussed. The model can reasonably simulate the behavior of brittle splitting

Weibull distribution and size effect of the rock strength. It is the premise of in-depth simulation analysis of particle flow simulation of damming material crushing and scale effect. The single particle numerical test shows that the particle shape has a significant influence on the breaking mode and particle strength under the same lithological material and fracture distribution. The more irregular the particle is

the greater the dispersion of particle strength.

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