颗粒材料结构自组织沉降细观研究  

Microscopic Investigation on Self-Organization Settlement of Granular Materials

作　　者：蒋红英[1] 鲁进步[2] 慕青松[3] 

机构地区：[1]西京学院工程技术系,西安710123 [2]西安外事技术学院,西安710077 [3]兰州大学土木工程与力学学院,兰州730000

出　　处：《桂林理工大学学报》2010年第4期556-560,共5页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(10402112);陕西省科学技术研究发展计划工业攻关项目(2010K07-28)

摘　　要：基于匀速加载状况下铁球、砾石、碎石颗粒材料结构的加压实验,应用随机理论分析了不同颗粒材料堆自组织沉降的特征,找出了反映颗粒材料结构沉降变形和自组织波动强烈程度的概率密度分布规律:碎石堆的剪阻力参数α=10.28,P(0.15)=0.216;砾石堆的剪阻力参数α=0.85,P(0.15)=0.956。提出了颗粒材料结构自组织沉降的概率模型,为预测颗粒材料结构的破坏和沉降提出了不同的计算方法。The characteristics in self-organization settlement of different granular materials are studied by the pressure experiment in uniform loading of granular material.The probability density distribution rule of subsidence distortion and self-organization fluctuation in the granular material are found：shear resistance α=10.28,P（0.15）=0.216 for deatritus;shear resistance α=0.85,P（0.15）=0.956 for gravel buildup.The probability model of self-organization settlement in granular material structure is introduced.Some different calculation methods for destruction forecasting and settlement in granular material structure are proposed.

关 键 词：颗粒材料结构 拱效应 概率模型 自组织沉降 

分 类 号：TU502[建筑科学—建筑技术科学]