Abstract Experimental and numerical studies were conducted to investigate the effect of reinforcing steel on the impact resistance of reinforced concrete structures and to reveal its mechanism. Hard-projectile impact tests using a single-stage gas gun were performed with reinforced concrete panels to simulate a nuclear power plant structure. Parametric analysis was conducted with a numerical model that applied a finite element method coupled with smoothed particle hydrodynamics using the following four variables: the impact velocity of the projectile as well as yield strength, spacing and diameter of the reinforcing steel. The experimental and numerical analysis results indicated that the impact resistance was significantly affected by the spacing of the reinforcing steel, but not by the yield strength or the diameter of the reinforcing steel. Narrower rebar spacing improved the impact resistance due to the enhanced confining and fragment trapping effects.

中文翻译：

---

钢筋对硬弹丸冲击下钢筋混凝土板抗冲击性能的影响

摘要 通过试验和数值研究，研究了钢筋对钢筋混凝土结构抗冲击性能的影响，并揭示其作用机理。使用单级气枪对钢筋混凝土板进行硬弹冲击试验，以模拟核电站结构。参数分析是通过数值模型进行的，该数值模型应用有限元方法与平滑粒子流体动力学相结合，使用以下四个变量：弹丸的冲击速度以及屈服强度、钢筋间距和直径。试验和数值分析结果表明，抗冲击强度受钢筋间距的显着影响，而不受屈服强度或钢筋直径的影响。