细观层次混凝土动态性能的影响因素研究综述

Investigation Review of Affecting Factors for Concrete Dynamic Performance in Meso-scale

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。

The concrete is a kind of three-phase composite, whose macro-mechanical properties correlate with interracial transition zone （ITZ）. In this paper, the research status of experimental study and numerical simulation on the ITZ mechanical properties are summarized, and the ITZ influential parameters to the macro-mechanical properties of concrete are also concluded. It is found that dynamic mechanical results obtained from meso-scale numerical simulation are based on certain assumptions. However, the reliability of these assumptions needs to be further validated by corresponding experimental data. Through summarizing the geometrical and mechanical influential parameters of ITZ, issues about how ITZ influences the macro-dynamic mechanical performances of concrete which require further study are pointed out.