辽宁工程技术大学学报（自然科学版）2025，Vol.44Issue(3)：283-292,10.DOI:10.11956/j.issn.1008-0562.20240306
基于细观力学特性的堆石料三轴数值模拟及尺寸效应研究
Triaxial numerical simulation and size effect of rockfill materials based on meso-mechanical properties
摘要
Abstract
To elucidate the size effect laws governing the mechanical characteristics of basalt rockfill materials under loading,a combined methodology incorporating particle flow numerical simulation and laboratory testing was employed,and by introducing size-dependent patterns of particle strength and elastic modulus derived from single-particle compression tests,mesoscopic parameters of graded aggregates were calibrated based on triaxial compression test results,and numerical simulations of triaxial tests were subsequently conducted for both prototype and scaled gradation rockfill materials.The research resultes demonstrate that increasing particle size promotes stress concentration within specimens,leading to structural failure predominantly manifested as shear shrinkage volumetric deformation;modified formulas were proposed for the Duncan-Chang E-B model parameters K,Kb,φ0 and Dφ to account for particle size effects,revealing that parameters K,Kb and φ0 exhibit decreasing trends with increasing particle size,while parameter Dφ shows an inverse correlation.These research outcomes provide valuable references for predicting stress-deformation behavior in dam structures.关键词
堆石料/尺寸效应/邓肯-张E-B模型/三轴数值模拟/强度及变形特性/颗粒粒径Key words
rockfill/size effect/Duncan-Chang E-B model/triaxial numerical simulation/strength and deformation characteristics/particle size分类
建筑与水利引用本文复制引用
吴双右,相彪,刘文杰,周艳梅,李本豪..基于细观力学特性的堆石料三轴数值模拟及尺寸效应研究[J].辽宁工程技术大学学报（自然科学版）,2025,44(3):283-292,10.基金项目
国家自然科学基金项目(42367025) （42367025）
云南省基础研究计划农业联合专项项目(202301BD070001-191) （202301BD070001-191）
