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应用计算机模拟研究了混凝土界面面积分数和渗流阈值.为了消除边界对骨料分布的影响,引入了周期性边界条件,提出了混凝土细观结构的静态模拟方法.结合MonteCarlo数值积分,获得了混凝土界面面积分数,并由合理的模拟精度确定了合适的样点数和模拟次数.根据计算结果,讨论了混凝土界面之间的重叠效应以及骨料级配、最大骨料直径和界面厚度对混凝土界面面积分数的影响.基于模拟所得的混凝土细观结构,提出了混凝土界面渗流阈值计算的数值方法,并通过与理论解进行比较,证实了该方法的有效性.同时,就最大骨料直径、骨料级配和界面厚度对混凝土界面渗流阈值的影响进行了详细的讨论.
In order to eliminate the influence of the boundary on the aggregate distribution, a periodic boundary condition is introduced and a static simulation method of the concrete mesostructure is proposed.Combined with Monte Carlo numerical integration, the concrete interface The area fraction and the appropriate number of samples and simulations were determined by the reasonable simulation accuracy.According to the calculation results, the overlap effect of concrete interface and the effects of aggregate gradation, maximum aggregate diameter and interface thickness on the interface area fraction of concrete The numerical method for calculating the percolation threshold of concrete interface is put forward based on the simulated mesoscopic structure of concrete.Compared with the theoretical solution, the method is proved to be effective.At the same time, the maximum aggregate diameter, aggregate level The influence of interface thickness and interface thickness on seepage threshold of concrete interface is discussed in detail.