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To describe the complex failure process of reinforced concrete (RC) beams subjected to impact loading accurately, a mesoscale numerical analysis method was established to explore the anti-impact performance of a RC beam considering concrete heterogeneity, strain rate effect of concrete mesocomponents, concrete being assumed as a 3-phase composite composed of aggregate particles, mortar matrix and interfacial transition zones (ITZs), and a web reinforcement being embedded into the plain concrete beam. Using the proposed simulation method, effects of dropping hammer velocity on anti-impact performance of a RC beam were investigated. The simulation results including failure modes, impact loading, mid-span deflection and support reaction were compared with those of the macro-scale simulation results and the published test results.It was shown that the simulation results agree well with those of tests; the proposed meso-scale numerical model and method are feasible for simulating anti-impact performance of RC beams. © 2018, Editorial Office of Journal of Vibration and Shock. All right reserved.
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