【摘要】 为验证Q355B钢管混凝土柱在破坏形态与冲击力响应方面的有效性，文中建立了圆钢管混凝土柱在水平冲击荷载作用下的数值模型。结果表明冲击速度等参数对圆钢管混凝土柱的冲击力学响应具有显著影响，当冲击速度增加1倍，冲击力峰值呈现13.84%的增幅；钢管厚度增大1倍使冲击力持时延长71.42%；冲击力峰值随着核心混凝土比例呈负相关关系，当核心混凝土比例达到53.33%时，冲击力减小10.03%；而柱端约束条件影响较小，通过适当增加钢管厚度和核心混凝土填充量来提高建筑或构件的抗水平侧向冲击力，为结构安全提供应对策略。更多还原

【Abstract】 To evaluate the performance of Q355B steel-concrete composite columns under impact, a numerical model of circular steel tube concrete columns subjected to horizontal impact loads was developed. Results show that impact velocity significantly affects the columns’ dynamic response, doubling the impact velocity increases the peak impact force by 13.84%. Increasing the steel tube thickness twofold extends the duration of the impact force by71.42%. The peak impact force is negatively correlated with the core concrete ratio, decreasing by 10.03% when the core concrete content reaches 53.33%. End restraint conditions have minimal influence. These findings suggest that appropriately increasing the steel tube thickness and core concrete content can enhance the lateral impact resistance of structures or components, providing effective strategies to ensure structural safety.更多还原