This paper develops a three-dimensional Finite Element (FE) model using the non-linear explicit code in LS-DYNA to predict the impact behavior of Steel–Concrete–Steel (SCS) sandwich beams with bolt connectors. The accuracy of the developed FE model is validated by comparing the FE-predicted impact force and displacement–time histories with the experimental results of the SCS sandwich beams. The FE prediction shows a close match with the test results. Using the validated FE model, parametric studies are carried out to investigate the influences of different parameters, i.e., spacing of connectors, strength of concrete, presence of endplates, location of impact, mass of drop weight, and height of drop. It is found that the spacing of connectors and the strength of concrete have a limited influence on the impact resistance of the SCS sandwich beams with bolt connectors. However, the concrete strength significantly affects the inertial peak impact force. The SCS sandwich beam without endplates shows higher deformation compared to the beam with endplates, and the location of impact exhibits influence on the impact resistance of the SCS sandwich beams. It is also revealed that the maximum displacements of the SCS sandwich beams could substantially rise with the increase in mass of drop weight and height of drop.

本文使用 LS-DYNA 中的非线性显式代码开发了一个三维有限元 (FE) 模型，以预测带有螺栓连接器的钢-混凝土-钢 (SCS) 夹层梁的冲击行为。通过将有限元预测的冲击力和位移-时间历程与 SCS 夹层梁的实验结果进行比较，验证了开发的有限元模型的准确性。FE 预测显示与测试结果非常匹配。使用经过验证的有限元模型，进行参数研究以研究不同参数的影响，即连接器间距、混凝土强度、端板的存在、冲击位置、落锤质量和落差高度。结果表明，连接件间距和混凝土强度对螺栓连接件SCS夹芯梁的抗冲击性能影响有限。然而，混凝土强度显着影响惯性峰值冲击力。与有端板的梁相比，无端板的 SCS 夹层梁变形更大，冲击位置对 SCS 夹层梁的抗冲击性能有影响。还表明，SCS夹层梁的最大位移会随着落锤质量和落差高度的增加而显着增加。冲击位置对SCS夹芯梁的抗冲击性能有影响。还表明，SCS夹层梁的最大位移会随着落锤质量和落差高度的增加而显着增加。冲击位置对SCS夹芯梁的抗冲击性能有影响。还表明，SCS夹层梁的最大位移会随着落锤质量和落差高度的增加而显着增加。