【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。更多还原

【Abstract】 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.更多还原