Abstract The response of building structures under impact loads is a challenging subject for both numerical and analytical studies, as the available experimental data is limited. In the current research, an attempt was made to study the experimental investigation on the exterior beam-column joint against accidental and intentional impact loading. The velocity regime of the projectile was considered in the range 30–34 m/s. The response of the structural member shielded with the Aluminum honeycomb sandwich panel was compared with the unshielded beam-column joint. The target damage, failure modes, energy absorption, and evolution of cracks were examined in terms of both analytically and experimentally. Results obtained from high-speed imaging were used to obtain the projectiles incident, residual, and re-bound velocities. The application of honeycomb shielding on the seismic group specimens shows that the ballistic limit was increased by its energy absorption characteristics. It was found that they have a 22% higher ballistic limit than that of the seismic group specimens without honeycomb shielding. The shielded honeycomb sandwich panel specimens show promising results as they absorbed 49% higher impact energy than that of seismic specimens without honeycomb shielding. The current study provides a valuable reference for designing of honeycomb panels as a sacrificial material to safeguard the engineering structures against impact loads in the intermediate velocity regime.

中文翻译：

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蜂窝屏蔽外梁柱节点冲击试验的意义

摘要 建筑结构在冲击载荷下的响应对于数值和分析研究都是一个具有挑战性的课题，因为可用的实验数据是有限的。在目前的研究中，试图研究外梁柱节点对抗意外和故意冲击载荷的实验研究。射弹的速度范围被认为是在 30-34 m/s 的范围内。将用铝蜂窝夹芯板屏蔽的结构构件的响应与未屏蔽的梁柱接头进行了比较。从分析和实验的角度对目标损伤、失效模式、能量吸收和裂纹演化进行了检查。从高速成像获得的结果用于获得弹丸的入射速度、残余速度和反弹速度。蜂窝屏蔽在抗震组试件上的应用表明，其吸能特性提高了弹道极限。发现它们的弹道极限比没有蜂窝屏蔽的地震组试样高 22%。屏蔽蜂窝夹芯板试样显示出有希望的结果，因为它们吸收的冲击能量比没有蜂窝屏蔽的地震试样高 49%。目前的研究为蜂窝板作为牺牲材料的设计提供了有价值的参考，以保护工程结构免受中速状态下的冲击载荷。发现它们的弹道极限比没有蜂窝屏蔽的地震组试样高 22%。屏蔽蜂窝夹芯板试样显示出有希望的结果，因为它们吸收的冲击能量比没有蜂窝屏蔽的地震试样高 49%。目前的研究为蜂窝板作为牺牲材料的设计提供了有价值的参考，以保护工程结构免受中速状态下的冲击载荷。发现它们的弹道极限比没有蜂窝屏蔽的地震组试样高 22%。屏蔽蜂窝夹芯板试样显示出有希望的结果，因为它们吸收的冲击能量比没有蜂窝屏蔽的地震试样高 49%。目前的研究为蜂窝板作为牺牲材料的设计提供了有价值的参考，以保护工程结构免受中速状态下的冲击载荷。