Paris Law Based Modelling Of Mixed Mode Fatigue Crack Propagation In Concrete-Concrete Interface

Abstract

In structural engineering, the integrity of concrete structures when subjected to cyclic loads remains a significant concern, more so in the case of repaired structures or mass concrete frameworks, wherein inherent interfacial imperfections exist. Hence, it is essential to model the fatigue crack propagation in concrete bi-material interface in order to facilitate the evaluation of the structural integrity of concrete constructions. This study considers the intrinsic mixed mode character of the interface and proposes a generalised model based on Paris, law to predict fatigue crack propagation in concrete-concrete interface by introducing equivalent stress intensity factor instead of mode-I stress intensity factor. The prediction model is validated using the experimental data on concrete-concrete interface from existing literature.