Abstract

To investigate the impact resistance of steel beams with different web openings, falling-hammer impact trials and numerical models analyses were performed, focusing on the impact energy, inter-opening space, and opening diameter. The impact resistance of steel beams with different web openings was analyzed, and damage-assessment curves for web-opening steel beams (WOSBs) under impact loads were established. The results showed that web-hexagonal-opening steel beams (WHOSBs) yielded greater damage-related deformation than web-circular-opening steel beams (WCOSBs) for the same impact energy. The average maximum mid-span displacement of the WCOSBs under the falling-hammer was 86.49% that of the WHOSBs, whereas the average energy absorption rate was 6.07% higher. The WCOSBs were more resistant to impacts than the WHOSBs. The impact velocity and mass were the key damage-assessment parameters, and velocity–mass damage-assessment curves and determination equations were established according to on the WOSBs’ maximum mid-span displacement under hinge-supported restraints at both ends. Thus, this study will serve as a reference for assessing the damages of WOSBs subjected to impacts.

中文翻译：

---

不同腹板开孔钢梁的抗冲击及损伤评估

摘要

为了研究具有不同腹板开口的钢梁的抗冲击性，进行了落锤冲击试验和数值模型分析，重点关注冲击能量、开口间距和开口直径。对不同腹板开孔钢梁的抗冲击性能进行了分析，建立了腹板开孔钢梁在冲击荷载作用下的损伤评估曲线。结果表明，在相同的冲击能量下，腹板六角形开口钢梁（WHOSB）比腹板圆形开口钢梁（WCOSB）产生更大的损伤相关变形。 WCOSB在落锤作用下的平均最大跨中位移是WHOSB的86.49%，平均能量吸收率高6.07%。 WCOSB 比 WHOSB 更能抵抗冲击。冲击速度和质量是关键的损伤评估参数，根据两端铰链约束下WOSB的最大跨中位移，建立了速度-质量损伤评估曲线和确定方程。因此，本研究可为评估WOSB遭受撞击时的损害提供参考。