ABSTRACT
This study examines the impact of fluid flow and aggregate fragmentation on the dynamic behavior of concrete under uniaxial compression at varying strain rates. Concrete was simulated as a four-phase material consisting of aggregate, mortar, ITZs, and macropores. The concrete mesostructure was obtained from laboratory micro-CT tests. 2D simulations were carried out. A novel, fully coupled DEM/CFD technique, based on a pore-scale thermal-hydro-mechanical model, was employed to predict the effects of strain rate, fluid flow, and aggregate fragmentation on the response of both partially and fully fluid-saturated concrete.
