| 摘要: |
| 为建立堆石混凝土三维力学模型，首先采用三维随机多面体来模拟堆石颗粒，提出了堆石颗粒的空间随机分布算法和密实算法；其次提出了自密实混凝土填充算法，生成了堆石混凝土三维力学模型；最后利用建立的三维力学模型，分析了单轴受压条件下，堆石混凝土结构组成对其力学性能的影响，并将计算结果与试验结果进行了对比.结果表明：所建立的堆石混凝土三维力学模型不仅能够反映堆石颗粒大小、形状和空间分布的随机性，还能反映其密实过程和堆石体骨架对堆石混凝土力学性能的影响，具有一定的可靠性，可以弥补试验条件的限制，为进一步研究堆石混凝土力学性能提供参考. |
| 关键词: 堆石混凝土 三维力学模型 数值模拟 力学性能 |
| DOI：10.3969/j.issn.1007 9629.2017.01.010 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51321064，51478464）；国家重大仪器专项资金资助项目（2014YQ240445） |
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| Methodology to Develop 3D Mechanical Model of the Rock Filled Concrete |
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FANG Qin, YAN Peng, ZHANG Jinhua, ZHAO Peisheng, CHENG Zhen
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College of Defense Engineering, PLA University of Science and Technology, Nanjing 210007, China
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| Abstract: |
| In order to establish the three dimensional（3D） mechanical model of rock filled concrete（RFC）， firstly， 3D random polyhedron was used to simulate the rock rubble， and the rock rubbles spatial random distribution algorithm and compaction algorithm were put forward； secondly， the self compacting concrete（SCC） filling algorithm was proposed to generate 3D mechanical model of RFC； finally， the mechanical properties of RFC under uniaxial compression were obtained with the established 3D mechanical model， and the calculated results were compared with the experimental results. The results show that the 3D mechanical model of RFC can not only reflect the randomness of rock rubbles size， shape and spatial distribution， but also can reflect the effect of compacting process and rock fill skeleton on the mechanical properties of RFC. With certain reliability， the RFC model can make up the limitation of test conditions and provide reference for further study of the mechanical properties of RFC. |
| Key words: rock filled concrete 3D mechanical model numerical simulation mechanical property |
