A new steel-polyurethane foam-steel-concrete-steel (SPUFSCS) panel, which consists of “soft” and “stiff” layers, was proposed and its impact resistant performance was experimentally, numerically and analytically studied. The front “soft” layer, including a steel plate and polyurethane foam (PUF), was designed for dissipating impact energy and reducing peak force transmitted to the rear “stiff” layer (i.e., SCS panel). The SCS panel with high strength and ductility was employed for resisting the transmitted impact force from PUF. Experimental studies on SPUFSCS panels under impact loading were first conducted by employing an instrumented drop weight impact test system to reveal their failure modes, impact force and displacement responses. The impact energy was found to be dissipated through local indentation and global deformation of the SPUFSCS panel. The Finite Element (FE) models of the tested SPUFSCS panels under impact loading were established and validated against the experimental results. Numerical results indicated that the impact energy dissipated by “soft” layer is higher than that of “stiff” layer, which demonstrated the benefits of employing “soft” layer on improving the impact resistance of the traditional SCS panel. In addition, an analytical model was also presented for predicting the displacement response of the SPUFSCS panel under impact loading. The analytical model was proven to be reasonable in predicting the displacement response by comparing with the experimental results.

提出了一种由“软”和“硬”层组成的新型钢-聚氨酯泡沫-钢-混凝土-钢 (SPUFCS) 面板，并对其抗冲击性能进行了实验、数值和分析研究。前“软”层，包括钢板和聚氨酯泡沫 (PUF)，旨在消散冲击能量并减少传递到后“硬”层（即 SCS 面板）的峰值力。采用具有高强度和延展性的 SCS 面板来抵抗 PUF 传递的冲击力。SPUFSCS 板在冲击载荷下的实验研究首先通过使用仪器化落锤冲击测试系统进行，以揭示其失效模式、冲击力和位移响应。发现冲击能量通过 SPUFSCS 面板的局部压痕和整体变形而消散。建立了受冲击载荷下测试的 SPUFSCS 板的有限元 (FE) 模型，并根据实验结果进行了验证。数值结果表明，“软”层耗散的冲击能量高于“硬”层，这表明使用“软”层对提高传统SCS面板的抗冲击性有好处。此外，还提出了一个分析模型，用于预测 SPUFSCS 面板在冲击载荷下的位移响应。通过与实验结果的比较，证明该解析模型在预测位移响应方面是合理的。建立了受冲击载荷下测试的 SPUFSCS 板的有限元 (FE) 模型，并根据实验结果进行了验证。数值结果表明，“软”层耗散的冲击能量高于“硬”层，这表明使用“软”层对提高传统SCS面板的抗冲击性有好处。此外，还提出了一个分析模型，用于预测 SPUFSCS 面板在冲击载荷下的位移响应。通过与实验结果的比较，证明该解析模型在预测位移响应方面是合理的。建立了受冲击载荷下测试的 SPUFSCS 板的有限元 (FE) 模型，并根据实验结果进行了验证。数值结果表明，“软”层耗散的冲击能量高于“硬”层，这表明使用“软”层对提高传统SCS面板的抗冲击性有好处。此外，还提出了一个分析模型，用于预测 SPUFSCS 面板在冲击载荷下的位移响应。通过与实验结果的比较，证明该解析模型在预测位移响应方面是合理的。这证明了采用“软”层来提高传统 SCS 面板的抗冲击性的好处。此外，还提出了一个分析模型，用于预测 SPUFSCS 面板在冲击载荷下的位移响应。通过与实验结果的比较，证明该解析模型在预测位移响应方面是合理的。这证明了采用“软”层来提高传统 SCS 面板的抗冲击性的好处。此外，还提出了一个分析模型，用于预测 SPUFSCS 面板在冲击载荷下的位移响应。通过与实验结果的比较，证明该解析模型在预测位移响应方面是合理的。