This review of the added value of multi-scale modeling of concrete is based on three representative examples. The first one is concerned with the analysis of experimental data, taken from four high-dynamic tests. The structural nature of the high-dynamic strength increase can be explained by using a multi-scale model. It accounts for the microstructure of the specimens. The second example refers to multi-scale thermoelastic analysis of concrete pavements, subjected to solar heating. A sensitivity analysis with respect to the internal relative humidity (RH) of concrete has underlined the great importance of the RH for an assessment of the risk of microcracking of concrete. The third example deals with multi-scale structural analysis of a real-scale test of a segmental tunnel ring. It has turned out that multi-scale modeling of concrete enables more reliable predictions of crack opening displacements in tunnel segments than macroscopic models taken from codes of practice. Overall, it is concluded that multi-scale models have indeed a significant added value. However, its degree varies with these examples. In any case, it can be assessed by means of a comparison of the results from three sources, namely, multi-scale structural analysis, conventional structural analysis, and experiments.

这篇关于混凝土多尺度建模附加值的综述基于三个具有代表性的例子。第一个与实验数据的分析有关，取自四个高动态测试。高动态强度增加的结构性质可以通过使用多尺度模型来解释。它解释了试样的微观结构。第二个例子是混凝土路面的多尺度热弹性分析，受到太阳能加热。对混凝土内部相对湿度 ( RH ) 的敏感性分析强调了RH的重要性。用于评估混凝土微开裂的风险。第三个示例处理分段隧道环的真实规模测试的多尺度结构分析。事实证明，混凝土的多尺度建模比从实践规范中获取的宏观模型能够更可靠地预测隧道管段中的裂缝开口位移。总体而言，可以得出结论，多尺度模型确实具有显着的附加值。但是，其程度因这些示例而异。在任何情况下，都可以通过多尺度结构分析、常规结构分析和实验三个来源的结果进行比较来评估。