| 摘要: |
| 将混凝土看作由粗骨料、硬化水泥砂浆及二者界面过渡区组成的三相复合材料，提出了适用于水分传输分析的混凝土细观格构网络模型.根据非饱和流体理论和基于平行板模型的单条裂缝水流立方定律，建立了开裂混凝土裂缝处水分传输系数的计算模型，并对开裂混凝土裂缝处相对含水量进行数值分析.与已有的试验结果对比表明，所建立的水分传输系数计算模型能够较准确地预测开裂混凝土裂缝处的相对含水量，从而能够较准确地模拟水分在开裂混凝土中的传输过程. |
| 关键词: 混凝土 水分传输 裂缝 细观 毛细吸水 |
| DOI：103969/jissn1007 9629201406006 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51378090）；水文水资源与水利工程科学国家重点实验室开放研究基金资助项目（2013491711）；中央高校基本科研业务费专项资金资助项目（DUT14LK23） |
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| Mesoscale Model for Water Transport in Cracked Concrete |
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WANG Licheng, BAO Jiuwen
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State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
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| Abstract: |
| Mesoscale lattice network model, in which concrete was treated as a three phase composite material consisting of coarse aggregate, hardened cement mortar and interfacial transition zone（ITZ） between the aggregate and the mortar matrix, was developed to analyze water transport process in concrete. Based on the unsaturated flow theory and the cubic law of water transport in a single crack, the model of water transport coefficient in cracks was built up to numerically simulate the relative water content distribution in cracked concrete. By comparison with experimental results it is shown that the model proposed is feasible to predict the relative water content of concrete and the mesoscale modeling on water transport in cracked concrete is accurate. |
| Key words: concrete water transport crack mesoscale capillary absorption |
