Dynamic shear behavior of concrete-soil interface based on cyclic simple shear test

Complicated and difficult responses between different materials are widely observed at many sites and situations in the civil engineering field. The behavior of soil is nonlinear and shows diverse features according to the material interaction with each other. Soil and other material comprise an area which transfers load and called as the interface. Though there are various kinds of interface, the characteristics of concrete-soil interface which represent the behaviors at the perimeter of soil-tunnel has been investigated based on the experimental approach in this study. The Multi-Purpose Interface Apparatus (M-PIA) has been modified and cyclic simple shear tests for concrete-soil interface were performed to consider dynamic load such as the earthquake. The Disturbed State Concept (DSC) was employed to analyze the test results and understand physical meaning of the interface shear behaviors of soil-tunnel. Furthermore, the disturbance function was also evaluated to describe dynamic shear behaviors of concrete-soil interface quantitatively.