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| 混凝土随机凸多面体骨料模型生成及细观有限元剖分 | |
| 引用本文： | 李运成,马怀发,陈厚群,胡晓.混凝土随机凸多面体骨料模型生成及细观有限元剖分[J].水利学报,2006,37(5):588-592. |
| 作者姓名： | 李运成 马怀发 陈厚群 胡晓 |
| 作者单位： | 1. 北京工业大学,北京,100022 2. 北京工业大学,北京,100022;中国水利水电科学研究院工程抗震研究中心,北京,100044 3. 中国水利水电科学研究院工程抗震研究中心,北京,100044 |
| 摘 要： | 混凝土的级配及骨料含量对其宏观力学特性有直接的影响，适当的随机骨料模型是进行混凝土细观力学数值模拟分析的前提和基础。本文针对全级配大坝混凝土的高骨料含量的要求，给出了一种高效率生成随机球骨料模型的方法。并在随机球骨料模型的基础上，形成随机凸多面体骨料模型。同时，研究了细观单元属性判别方法，编制了对含有凸多面体骨料的细观区域进行结构性有限元网格剖分程序。本文给出的三维随机骨料模型算法不但考虑混凝土的骨料的实际级配和含量，而且计及了骨料的实际形态。 |
| 关 键 词： | 细观力学 全级配混凝土 三维随机骨料模型 数值模拟 |
| 文章编号： | 0559-9350（2006）05-0588-05 |
| 收稿时间： | 2005-08-31 |
| 修稿时间： | 2005年8月31日 |
Approach to generation of random convex polyhedral aggregate model and plotting for concrete meso-mechanics |
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| LI Yun_cheng.Approach to generation of random convex polyhedral aggregate model and plotting for concrete meso-mechanics[J].Journal of Hydraulic Engineering,2006,37(5):588-592. | |
| Authors: | LI Yun_cheng |
| Affiliation: | Beijing University of Technology, Beijing 100022, China |
| Abstract: | The mechanical behavior of concrete is directly related to its gradation and aggregate content. An appropriate random aggregate model is the basis for successfully simulating the meso_mechanical behaviors of concrete. A method for simulating full_graded aggregate concrete with high aggregate content, which can efficiently pack the spherical aggregates, is proposed. Based on this model, a 3_D random convex polyhedron aggregate model considering the actual aggregate content, gradation and shape of aggregate is established. urthermore, the method for identifying the properties of the meso_elements is investigated and the meshing codes are designed to automatically generate the meso_scale structured grids of concrete. |
| Keywords: | meso_mechanics full_graded aggregate concrete random convex polyhedral aggregate model numerical simulation |
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