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| 摘要: |
| 讨论了用于混凝土弹性模量预测的三相格构模型。通过模拟混凝土细观结构并应用梁单元三角形网格，提出了预测混凝土弹性模量的数值方法、计算结果表明，在合理地考虑了混凝土中骨料、水泥浆基体和界面分布的基础上，该模型预测结果与相应的实验结果良好吻合。另外，基于该模型，可分析界面层厚度、弹性模量和泊松比对混凝土相对弹性模量的影响。 |
| 关键词: 混凝土 弹性模量 三相格构模型 界面过渡区 有限元法 |
| DOI： |
| 分类号:TU528.01 |
| 基金项目:国家自然科学基金资助项目(50178003) |
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| Three-phase Lattice Model for Predicting the Elastic Modulus of Concrete |
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ZHENG Jian-jun ZHOU Xin-zhu
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| Abstract: |
| A three-phase lattice model for predicting the elastic modulus of concrete is discussed. By simulating the mesostructure of concrete and applying a triangular lattice mesh with beam elements, a numerical method is presented for predicting the elastic modulus of concrete. The results show that based on reasonable consideration of the distribution of the aggregate, cement matrix and interfacial transition zone in concrete, the predictions from this model are in good agreement with the corresponding experimental results. Based on the model, the influence of the thickness, elastic modulus and Poisson's ratio of the interfacial transition zone on the relative elastic modulus of concrete is analyzed in detail. |
| Key words: concrete,interfacial transition zone (ITZ),elastic modulus,triangular lattice mesh with beam elements,finite element method |
