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- W4384927204 abstract "Drop hammer impact tests based on the reduced-scale model are the most commonly accepted technique to investigate the impact response of reinforced concrete (RC) beams. However, the scale of RC beam prototypes in actual engineering is much larger than that of test specimens in the laboratory. Whether the analytical results obtained from the small-scaled specimens can be fully extrapolated and evolved to large/full-scaled geometrically similar prototype components needs further discussion. Given a structural scale factor, this study applied numerical simulations on four series of geometrically similar RC beams under different impact energy combinations. The effects of structural scales and energy combinations on the beams' damage modes, midspan displacement response, and energy absorption were numerically investigated. The results indicate that there is a scale effect on the impact displacement of geometrically similar RC beams, which is influenced by the energy combination. A dimensionless displacement analytical model was developed for single-scaled RC beams under drop weight impact using Buckingham's π-theorem, validated by several drop weight impact results. Based on the validated dimensionless model, a unified impact displacement prediction model for geometrically similar RC beams was proposed by considering the coupling effect of structural scales and impact energy combinations. The proposed model provides a reference for designing and verifying the prototype members. Moreover, the numerical parametric study results preliminarily evaluated the accuracy and safety of the present model." @default.
- W4384927204 created "2023-07-22" @default.
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- W4384927204 date "2023-11-01" @default.
- W4384927204 modified "2023-09-23" @default.
- W4384927204 title "A unified impact displacement prediction model for geometrically similar RC beams: from test specimen to prototype component" @default.
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- W4384927204 doi "https://doi.org/10.1016/j.ijimpeng.2023.104731" @default.
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