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混凝土是三相复合材料,其宏观力学特性与界面过渡区(ITZ)有关。本文总结了ITZ力学性能的试验与数值模拟研究现状,并就ITZ影响混凝土宏观动态力学性能的参数进行了归纳。结果表明,由于缺乏ITZ动态力学性能的试验数据,目前基于细观数值模拟技术研究混凝土试样动态力学性能的成果均是在一定假设条件下开展的。然而,这些假设条件的可靠性有待相应试验数据的验证。经过对ITZ的几何和力学影响因素的总结,指出针对ITZ影响混凝土宏观动态力学性能问题中尚待深入研究的内容。
Concrete is a three-phase composite with macroscopic mechanical properties related to the Interfacial Transition Zone (ITZ). This paper summarizes the experimental and numerical simulation research status of ITZ mechanical properties, and summarizes ITZ parameters that affect the macroscopic dynamic mechanical properties of concrete. The results show that due to the lack of experimental data of dynamic mechanical properties of ITZ, the current research on the dynamic mechanical properties of concrete specimens based on meso-numerical simulation is carried out under certain assumptions. However, the reliability of these assumptions needs to be verified by the corresponding experimental data. After summarizing the geometrical and mechanical factors of ITZ, it is pointed out that it is necessary to further study the impact of ITZ on macroscopic dynamic mechanical properties of concrete.