摘要
在清华大学土与结构接触面循环加载剪切试验机的基础上, 研制了可进行两种散粒体间接触面试验的叠环式单剪试验系统,并对糯扎渡高心墙堆石坝坝料的接触特性进行了系统的试验研究。结果表明,两种散粒体材料间接触面的强度包线为其单相材料强度下的包线。当达到破坏强度后,在接触界面附近会产生集中的“刚塑性”接触面剪切变形,其位置发生在强度最薄弱处。两种散粒体间的接触变形特性可通过刚塑性模型来描述。
On the basis of the cyclic shear apparatus for soil-structure interface in Tsinghua University, a laminar-ring simple shear apparatus for the study of the mechanical behavior of interface between granular materials is developed. A series of experiments are conducted with the embankment materials used in Nuozhadu high earth core dam. It is confirmed that the shear strength envelope of the interface is the lower shear strength envelope of the two granular materials. When the failure strength is reached, concentrated rigid plastic shear deformation takes place in an area near the interface with the lowest strength. The rigid-plastic model can be used to simulate the deformation behavior of the interface between two granular materials.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2004年第10期1522-1526,共5页
Rock and Soil Mechanics
关键词
散粒体
接触面
单剪试验
刚塑性模型
Granular materials
Interfaces (materials)
Mechanical properties
Shear strength
Testing
