The structural performance of the Steel-Concrete-Steel (SCS) sandwich beams with bolt connectors subjected to off-center impact load was investigated in this paper. Nine SCS sandwich beams were tested under impact loading by employing a drop hammer impact test system. The influences of concrete core depth, steel plate thickenss, top to bottom steel plate thickness ratio, and impact location on the responses of SCS sandwich beams were experimentally studied. The experiments revealed three failure modes of the SCS sandwich beams, i.e., flexure, flexure-shear, and fracture of the bottom steel plate. The separation of steel plates was prevented, and the structural integrity of the SCS sandwich beams was maintained despite the impact near the support, owing to the presence of bolt connectors. An analytical model was developed to predict the displacement–time histories of the SCS sandwich beams subjected to impact load. The predicted displacement responses showed a good match with the experimental results. Moreover, the force–displacement curves obtained from the analytical model and impact tests were compared, and good agreement between them could be observed.

本文研究了带有螺栓连接件的钢-混凝土-钢 (SCS) 夹层梁在偏心冲击载荷下的结构性能。九个 SCS 夹层梁在冲击载荷下通过落锤冲击测试系统进行了测试。试验研究了混凝土芯深、钢板厚度、上下钢板厚度比、冲击位置对SCS夹芯梁响应的影响。实验揭示了SCS夹芯梁的三种破坏模式，即弯曲、弯曲剪切和底板断裂。由于螺栓连接器的存在，防止了钢板的分离，并且尽管在支撑附近发生了冲击，但 SCS 夹层梁的结构完整性得以保持。开发了一个分析模型来预测 SCS 夹层梁在冲击载荷下的位移-时间历程。预测的位移响应与实验结果非常吻合。此外，比较了从分析模型和冲击试验中获得的力-位移曲线，可以观察到它们之间的良好一致性。