A mesoscale numerical simulation method for anti-impact performance of RC beams

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (2) : 57-65.

JIN Liu, XU Jiandong, ZHANG Renbo, DU Xiuli

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Abstract

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 meso components, 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.

Key words

RC beam / 3D mesoscopic simulation model / impact loads / strain rate effect / anti-impact performance

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JIN Liu, XU Jiandong, ZHANG Renbo, DU Xiuli. A mesoscale numerical simulation method for anti-impact performance of RC beams[J]. Journal of Vibration and Shock, 2018, 37(2): 57-65

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