In this study, thirty specimens were tested using a drop hammer impact test machine, comprising six reinforced concrete columns and twenty-four specimens of the composite columns. The composite columns include steel tubular-encased reinforced concrete (R-ST) columns, steel-reinforced concrete-filled steel tubular (S-ST) columns, hollow concrete-filled double steel tubular (H-DS) columns, and solid concrete-filled double steel tubular (S-DS) columns. The influences of different axial load levels and different column sections on the responses, such as impact force, the impact duration, the deflection, and the longitudinal strain, are investigated and discussed in detail. The results indicate that compared with the brittle failure of RC columns, all R-ST columns and composite columns behaved in a ductile manner. Moreover, the steel tube can effectively enhance the impact resistance of RC columns. The variation of axial load level has an important influence on the axial load attenuation, deflection, the impact duration, and the plateau value of the impact force. Under the same test conditions, S-DS columns have the best impact resistance with the lowest mid-span displacement, followed by H-DS columns, whereas the impact resistance of S-ST columns is slightly inferior with the highest mid-span displacement among the composite columns.

在这项研究中，使用落锤冲击试验机测试了30个样品，其中包括6个钢筋混凝土柱和24个复合材料柱。复合柱包括：钢管混凝土柱（R-ST），钢管混凝土柱（S-ST），空心混凝土钢管柱（H-DS）和实心混凝土柱。填充双钢管（S-DS）柱。研究和讨论了不同的轴向载荷水平和不同的柱截面对响应的影响，例如冲击力，冲击持续时间，挠度和纵向应变。结果表明，与RC柱的脆性破坏相比，所有R-ST柱和复合柱均表现出延性。此外，钢管可有效提高RC柱的抗冲击性。轴向载荷水平的变化对轴向载荷的衰减，挠度，冲击持续时间和冲击力的平稳值具有重要影响。在相同的测试条件下，S-DS柱的抗冲击性最好，中跨位移最低，其次是H-DS柱，而S-ST柱的抗冲击性稍差，中跨度位移最高复合列。