NUMERICAL SIMULATION OF ADVANCED MICRO-REINFORCED CONCRETE COMPOSITE SYSTEMS SUBJECTED TO BLAST LOADING

摘要

This paper examines the development of a material model for Finite Element Analysis (FEA) modeling of an innovative Micro-Reinforced Concrete (MRC) product in blast mitigation applications. The advanced composite material matrix of the MRC product, which consists of a self-consolidating, high strength mortar with multiple layers of fine-wire steel mesh reinforcement infiltrated with a cementitious slurry, has been shown to achieve high performance properties compared with standard reinforced concrete mixtures, including superior compressive strength, ductility and fragment/spall resistance. The performance of the MRC product has been demonstrated with field testing of structural components subjected to both static and blast load environments. Using the developed material model, representative field tests were modeled with the non-linear FEA program LS-DYNA, and the numerical results are compared with the field test results. In all cases considered in this study, the FEA models predicted results similar to those observed in the field testing. Discussion is also provided on advantages and limitations of the MRC system.