科技创新与应用2025，Vol.15Issue(21)：13-18,6.DOI:10.19981/j.CN23-1581/G3.2025.21.003
基于离散元的土石混合体尺寸效应分析
摘要
Abstract
In order to study the impact of the size effect of the earth-rock mixture and provide a theoretical basis for disaster prevention and reduction in mountainous areas in southwestern China,the basic physical properties and particle gradation distribution of the Zheduoshan earth-rock mixture were determined through indoor tests.Consolidating and undrained tests were carried out on samples of different sizes based on the PFC2D method.The data were sorted out and the hysteretic curve and backbone curve of the samples were fitted and analyzed to study the influence of the size effect of the earth-rock mixture on its deformation characteristics.The analysis results found that under the same strain,the stress corresponding to the small size specimen was greater than that of the medium size and large size,and the dynamic shear modulus decreased with the increase of the size.Compared with the indoor test results,it was found that the numerical simulation results were in line with the regularity of the indoor test.关键词
土石混合体/尺寸效应/变形特性/离散元/数值模拟Key words
soil-rock mixture/size effect/deformation characteristics/discrete element/numerical simulation分类
建筑与水利引用本文复制引用
史美杰,储峰,马书航,张迎宾..基于离散元的土石混合体尺寸效应分析[J].科技创新与应用,2025,15(21):13-18,6.基金项目
中国路桥工程有限责任公司科技项目(P2220447) （P2220447）
