岩土力学2026，Vol.47Issue(7)：2213-2223,2297,12.DOI:10.16285/j.rsm.2025.0635
考虑微观力学机制的胶结岩土材料各向异性强度解析解
Micromechanical mechanism-based analytical solution for anisotropy strength of cemented geo-materials
摘要
Abstract
The initial anisotropy resulting from particle shape and granular arrangement significantly influences the mechanical behaviors of cemented geo-materials.To establish an anisotropic strength criterion for cemented geo-materials that incorporates micromechanical mechanisms,we utilize regularly arranged elliptical particle assemblies.By employing a micro-analytical model,we develop an equivalent lattice model for these assemblies,assign particle contact properties to the corresponding lattice beams,and apply a size-dependent nonlinear yield criterion to describe beam breakages.Through mechanical analysis of the instability state of the representative volume element,we propose macroscopic strength and corresponding strength parameters expressed in terms of microscopic parameters(particle shape parameters,contact parameters)and the tilting angle.The correctness of the analytical solution is verified through numerical simulations based on the discrete element method.The results demonstrate that the proposed strength analytical formula can effectively reflect the influence of initial anisotropy on the mechanical properties of cemented geo-materials.The macro-micro quantitative correlation analytical solution reveals the quantitative influence of initial anisotropy caused by particle shape and regular arrangement,as well as inter-particle contact characteristics,on macroscopic mechanical behaviors.关键词
初始各向异性/格构模型/离散单元法/宏微观关联Key words
inherent anisotropy/lattice mode/discrete element method/micro-macro relation分类
建筑与水利引用本文复制引用
蒋明镜,陈瑞鑫,周志豪..考虑微观力学机制的胶结岩土材料各向异性强度解析解[J].岩土力学,2026,47(7):2213-2223,2297,12.基金项目
国家自然科学基金重点项目(No.52331010,No.52531010). This work was supported by the National Natural Science Foundation of China(52331010,52531010). （No.52331010,No.52531010）
