Multi-physics blast analysis of reinforced high strength concrete

Abstract

The blast damage behavior of reinforcing bars embedded in a High Strength Concrete (HSC) exposed to blast loading is investigated. In order to properly evaluate the HSC slab subject to blast loading, an explicit analysis program was used in this work. The multi-physics method of coupled Eulerian-Lagrangian solver is used to improve the efficiency and reliability of numerical simulation. To enhance the accuracy of the simulation results, the equation of state, strength and failure models of materials are implemented in AUTODYN. Specifically, the implemented multi-limit strength and failure surface models included strain rate effect and tensile fracture energy for HSC. The realized and idealized 3D quarter-symmetric models are used to obtain a reasonable computational running time, and the numerical simulation of the spalling and scabbing of an HSC slab under blast loading is presented. To validate the implemented material models and analysis method, a comparison is made with reported experimental results, and the simulation results are found to be in good agreement with the experimental results.