A STUDY OF DEFORMATION IN THE INTERFACE BETWEEN SOIL AND CONCRETE

A large size direct shear test of the interface between soil and concrete was performed. The measured relative slip displacements along the interface show that the relative displacement distribution is uneven. The traditional method that the shear stiffness or shear modulus is derived from curves of shear stress versus shear relative displacement obtained from direct shear tests is unreasonable. The rigid- plastic model is suggested for interface deformation. And a new kind of interface element with thickness is developed, which can simulate the interface deformation behavior more realistically.