天津建设科技2025，Vol.35Issue(1)：30-32,80,4.DOI:10.3969/j.issn.1008-3197.2025.01.008
基于PFC2D的路基填料细观参数影响研究
Study on the Influence of Mesoscopic Parameters of Subgrade Filler Based on PFC2D
许腾 1李炜 1曹俊仁1
作者信息
- 1. 湖州交通规划设计院,浙江 湖州 313000
- 折叠
摘要
Abstract
In order to determine the mesoscopic parameters of simulated Subgrade Filler soil samples parameters quickly and accurately.In this paper,based on PFC2D discrete element software,the effects of different microscopic parameters(including modulus,stiffness ratio,friction coefficient,vertical stress,etc.)on shear displace-ment-shear stress curve and shear strength during direct shear test are studied.The results show that the mod-ulus and stiffness ratio have influence on the initial slope and peak value(shear strength)of the shear dis-placement-shear stress curve.With the increase of the modulus and stiffness ratio,the initial slope and peak value will increase to different degrees.The friction coefficient has an effect on the initial slope and peak strength,and the increase of vertical stress will lead to the increase of shear strength.The internal friction An-gle and cohesion can be determined by the relationship curve between shear strength and vertical stress.At the same time,the application of linear constitutive model and parallel bond model is also analyzed.Linear constitutive model is more suitable for simulating unbonded granular filler,while parallel bond model is more suitable for simulating subgrade soil filler.关键词
直剪试验/颗粒流/细观参数/路基/填料Key words
direct shear test/particle flow/mesoscopic parameter/subgrade/filler分类
交通工程引用本文复制引用
许腾,李炜,曹俊仁..基于PFC2D的路基填料细观参数影响研究[J].天津建设科技,2025,35(1):30-32,80,4.
