河北水利电力学院学报2026，Vol.36Issue(2)：44-52,9.DOI:10.16046/j.cnki.issn2096-5680.2026.02.008
基于PFC2D的建筑固废路基填料混凝土直剪试验数值模拟研究
Numerical Simulation Study on Direct Shear Test of Construction Waste Roadbed Fillers Based on PFC2D
摘要
Abstract
To uncover the mechanism underlying the influence of coarse particle content on the shear behavior of construction waste roadbed fillers,facilitate the high-efficiency utilization of construction waste,and advance green and sustainable development in the transportation sector,this study investigates the effects of varying coarse particle contents(40%,60%,and 80%)on the mechanical behavior of con-struction waste roadbed fillers during concrete direct shear tests via Particle Flow Code(PFC2D)numeri-cal simulation rooted in the discrete element method(DEM).The reliability of the numerical model is val-idated through comparison with experimental data obtained from indoor large-scale direct shear tests.Re-sults demonstrate that both the peak strength and residual strength of the soil exhibit an increasing trend with the rise in coarse particle content,attaining their maximum values at a coarse particle content of 80%.Mesoscopic analysis reveals that changes in coarse particle content significantly influence the distri-bution of inter-particle contact force chains.This research indicates that coarse particle content ultimately governs the macroscopic mechanical response of the soil by regulating the transmission paths of the meso-scopic force chain network,thereby elucidating the mechanism by which coarse particle content affects the mechanical properties of the soil.The findings provide a reference for theoretical research and engineering practice concerning the engineering characteristics of coarse-grained soils.关键词
路基/建筑固废/PFC2D/直剪试验Key words
roadbed/construction waste/PFC2D/direct shear test分类
建筑与水利引用本文复制引用
李艳红,杨凤仪,于楠,李子煊,宋杨,孙伟宸..基于PFC2D的建筑固废路基填料混凝土直剪试验数值模拟研究[J].河北水利电力学院学报,2026,36(2):44-52,9.基金项目
国家自然科学基金资助项目(51978237) （51978237）
河北水利电力学院基本科研业务费重点培育项目(SYKY2302) （SYKY2302）
