摘要
天然沉积黄土具有结构性,因为其在结构破坏前后表现出非常不同的力学特性。为了真实地反映黄土的结构性、湿陷变形特性,在室内试验的基础上,应用充分扰动饱和粘土的稳定孔隙比和稳定状态原理,根据不可逆变形由团块之间滑移和团块破碎机理所引起的概念及土体损伤演化定律,建立了非饱和黄土的屈服函数和损伤函数,得到了非饱和原状结构性黄土的结构性数学模型。该模型能够模拟加载及其他力学特性,且物理意义明确,数值计算结果与试验结果吻合很好。
Natural sedimentary loess has structural properties, and it shows different mechanical properties before and after structural failure. Laboratory tests are performed to reveal the structural properties and collapsible deformation characteristics. The yield function and damage function of the unsaturated loess are established based on the principle of loess damage evaluation principle, the relationship between stable porous ratio and stable state of wholly-disturbed saturated clay, and the fact that inverse deformation is caused by the slip and crash among masses. The constitutive mathematical model of unsaturated natural loess is set up, by which loading process and other properties can be simulated. This model has clear physical meaning and the numerical calculation by it agrees well with tests.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第4期565-569,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(19772019)
陕西高校省级重点实验室重点科研计划项目
