Reinforced concrete (RC) columns subjected to lateral impact loading were experimentally and numerically investigated to observe the effects of various parameters on the impact response of the columns. A free-falling weight test setup, designed by one of the authors, was used to apply impact loading to the RC columns. Eight test specimens of square cross-section were fabricated and tested. The main variables considered were the application point of impact loading, the shear reinforcement spacing and the concrete compressive strength. Acceleration, displacement and impact load measurements were taken during the impact tests. The general behaviour of the test specimens, their collapse mechanisms and acceleration–time, displacement–time and impact load–time relationships were interpreted and load–displacement relationships were obtained. The results showed that the transverse reinforcement spacing had a significant effect on the overall impact resistance of the considered columns. Finite-element analyses of the tested specimens were performed using the Ansys Autodyn explicit solver to investigate the impact behaviour further. Reasonable accuracy was achieved in the numerical simulations.

中文翻译：

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侧向低速冲击荷载作用下钢筋混凝土柱的试验与数值研究

对钢筋混凝土（RC）柱承受侧向冲击载荷进行了实验和数值研究，以观察各种参数对柱的冲击响应的影响。由一位作者设计的自由落体式重量测试装置用于对RC柱施加冲击载荷。制作并测试了八个横截面为正方形的试样。考虑的主要变量是冲击载荷的施加点，抗剪钢筋间距和混凝土抗压强度。在冲击试验中进行了加速度，位移和冲击载荷的测量。解释了试样的一般行为，其塌陷机理以及加速时间，位移时间和冲击载荷时间关系，并获得了载荷位移关系。结果表明，横向钢筋间距对所考虑柱的整体抗冲击性具有显着影响。使用Ansys Autodyn显式求解器对测试样本进行有限元分析，以进一步研究冲击行为。在数值模拟中达到了合理的精度。