Fracture Mechanics based Modelling for Failure of Concrete Shear Key and Application to Design of Segmental Structure

Abstract

In this paper, a mechanical model for the design of plain concrete and fiber reinforced concrete shear key joints is developed. The method makes use of well-known results of fracture mechanics and truss model theory, combined in a simple model. The model is in good agreement with push-off shear test, and a nonlinear FEM analysis results. Furthermore, the involvement of the proposed model in the current design of segmental structures is investigated. A nonlinear FEM analysis is carried out, emphasizing the effects of the load-displacement characteristics of joints on the behavior of segmental structures to demonstrate the specified contribution of the model.