The performance of the newly developed soft-hard-soft (SHS) cement based composite system under multiple impact loading was investigated using a combined numerical and experimental study. Such a composite consists of three layers including Geogrid (GST) reinforced asphalt concrete (AC) on the top, high strength concrete (HSC) layer in the middle, and fiber reinforced cementitious composites (FRCC) at the bottom. A Hard-Soft-Hard (HSH) composite pavement was also proposed and tested for comparison purpose. In addition, the experimental results were compared with standard rigid and flexible pavements. The SHS composite system exhibits minimum damage, higher energy absorption and significant improved impact resistance against multiple impact loading compared with the other three types of pavements. A 3D finite element (FE) model was also established and confirmed the experimental results for the SHS composite pavement. Following the FE model, intensive parametric study was conducted to investigate the factors to enhance the impact resistance of the SHS composite system. The results can guide the upgrade options for runway pavement and be used for further development of the protective composite.

中文翻译：

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多重冲击载荷作用下软硬软(SHS)水泥基复合体系的试验与数值研究

结合数值和实验研究，研究了新开发的软-硬-软 (SHS) 水泥基复合材料系统在多次冲击载荷下的性能。这种复合材料由三层组成，包括顶部的土工格栅（GST）增强沥青混凝土（AC），中间的高强度混凝土（HSC）层和底部的纤维增强水泥基复合材料（FRCC）。还提出并测试了硬-软-硬 (HSH) 复合路面以进行比较。此外，将试验结果与标准刚性和柔性路面进行了比较。与其他三种类型的路面相比，SHS 复合材料系统具有最小的损坏、更高的能量吸收和显着改善的多重冲击载荷抗冲击性。还建立了 3D 有限元 (FE) 模型并证实了 SHS 复合材料路面的实验结果。根据有限元模型，进行了深入的参数研究，以研究提高 SHS 复合材料系统抗冲击性的因素。结果可以指导跑道路面的升级选项，并用于进一步开发保护性复合材料。