基于细-微观孔隙分布的混凝土渗流问题的多尺度关联模型和算法

In this project, the characterization method and stochastic model of meso-microscopic pore-network of concretes will be studied, and a multiscale model will be developed to simulate the permeability behavior of concretes. After that, the corresponding mathematical and mechanical theory will be explored, and the corresponding software and numerical simulation, based on the engineering background, will be studied to verify the validation of this model. The aim of this project is to investigate the effective of meso-microscopic pore-network for the macroscopic permeability behavior of concretes, and achieve the coupling analysis of the pore structure and macroscopic behavior of concretes. By this way, this research will offer a new and high efficiency computational method to the understanding of the permeability behaviors, and obtain the corresponding mathematical and mechanical theory in part. At last, this model can be extended and applied to the prediction of the permeability behavior of the rock mass with random distribution of multiscale cracks/joints.

本项目将研究混凝土的细-微观孔隙分布网络的表征方法与随机分布模型；设计一套面向混凝土渗流行为模拟的多尺度关联模型；研究相应的高效多尺度算法及相关的数学力学理论；并开发相应的软件和进行有工程背景的数值模拟，检验算法的有效性。目标是探讨混凝土细-微观孔隙网络分布对宏观渗流行为的影响，实现孔隙结构与宏观性能的耦合分析，为混凝土结构的渗流行为模拟提供一套新的高效计算方法，部分的解决遇到的数学力学理论问题;并努力将其推广应用到含有多尺度裂隙和节理的地下岩体渗流行为的研究。

在项目执行过程中，本项目探讨了混凝土细-微观孔隙网络分布对宏观渗流行为的影响，构造了混凝土的细-微观孔隙分布网络的表征方法与随机分布模型，并设计一套面向混凝土渗流行为模拟的多尺度关联模型及高效多尺度算法，实现了孔隙结构与宏观性能的耦合分析；接着通过编写程序进行数值计算与工程试验作比较，数值结果和工程试验有较好的一致性，同时也进行了相应的数学力学理论的研究，相关研究结果发表在《International Journal for Numerical Methods in Engineering》，《International Journal of Solids and Structures》，《Physical Review E》等国际知名SCI杂志上.