摘要
利用研制的大型单剪仪，对细粒土进行了土─混凝土接触面单剪试验研究。从试验结果分析得到剪切破坏带及其厚度。针对土体在剪切带内既有沿界面的错动滑移薄变形，又有自身剪切变形的双重变形机制，提出了接触面剪切滑移薄层单元及其本构关系，并给出其参数的确定方法。通过有限元数值模拟，证明了所提出接触面单元和本构关系的合理性。
By using the large size single shear apparatus, the single shear tests for fine grained soil-concrete interface are conduct- ed. A shear band and its thickness are found from the test samples. Two kinds of deformation of a shear band are discovered: sliding on the interface and shearing in the band. Based on the test results, a new interface element called Slide-Shear-Layer element and a new constitutive law are proposed. A calibration method to determinate six parameters of the law is obtained. Numerical simulation shows that the new interface element and its constitutive law are reasonable.
出处
《土木工程学报》
EI
CSCD
北大核心
2000年第4期42-46,共5页
China Civil Engineering Journal
关键词
土
混凝土
接触面特性
大型单剪仪
试验
characteristic of interface between soil and concrete, large-size simple shear apparatus, thickness of inter- face, interface element, constitutive law
