Abstract In order to investigate the blast and impact resistance of seismically designed and detailed RC columns, six RC columns (160 × 160 × 2468 mm) were constructed and tested using shock-tube and drop-weight impact test facilities. The influence of seismic detailing, with higher amounts of transverse reinforcement, was investigated. In addition, the effects of retrofitting using ultra-high performance fiber-reinforced concrete (UHPFRC) jacketing were studied. Non-linear finite element analyses were also carried out to predict the experimental results. The test results demonstrated that the use of seismic detailing improves the blast resistance of columns, resulting in reductions of the maximum and residual displacements at the mid height of the column, better control of cracks, and an ability to sustain larger blast loads. However, for drop-weight impact loading, the seismically detailed column did not show significant improvements in the tolerance to local damage and the control of displacements. In contrast, the use of UHPFRC jacketing in combination with seismic detailing showed excellent control of displacements and increased load carrying capacity under both blast and impact loadings.

中文翻译：

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抗震细部 RC 和 UHPFRC 加强柱的冲击和爆破性能

摘要 为了研究抗震设计和细部 RC 柱的爆炸和抗冲击性，建造了 6 根 RC 柱（160 × 160 × 2468 mm）并使用冲击管和落锤冲击试验设备进行了试验。研究了具有较高横向钢筋数量的抗震细节的影响。此外，还研究了使用超高性能纤维增强混凝土 (UHPFRC) 护套进行改造的效果。还进行了非线性有限元分析以预测实验结果。试验结果表明，抗震细部的使用提高了柱子的抗爆能力，从而减少了柱子中间高度的最大位移和残余位移，更好地控制了裂缝，并能够承受更大的爆炸载荷。然而，对于落锤冲击载荷，抗震细柱在对局部损坏的容忍度和位移控制方面没有显着改善。相比之下，将 UHPFRC 护套与抗震细部结合使用显示出在爆炸和冲击载荷下对位移的出色控制和增加的承载能力。