利用蒙特卡罗随机数方法,结合MATLAB软件,采用自编程序生成了纤维混凝土二维细观结构数值模型,其中不仅考虑了骨料的随机分布,同时也考虑到了纤维的随机分布。并用三级配混凝土算例对此程序进行了验证。结果表明,此方法快捷、高效、简单,并满足骨料与纤维在混凝土中随机分布的要求,为纤维混凝土的有限元模拟分析奠定了基础。 Using Monte Carlo random number method, combined with MATLAB software, a two-dimensional meso-scale mesostructured model of fiber reinforced concrete was generated by self-programming, which not only considered the random distribution of aggregates, but also considered the random distribution of fibers. The procedure was verified using a three-tiered concrete example. The results show that this method is fast, efficient and simple, and satisfies the random distribution requirements of aggregates and fibers in concrete, laying the foundation for finite element simulation analysis of fiber reinforced concrete.