混凝土二维参数化骨料模型的创建方法

宋来忠; 沈涛; 余波

doi:10.6052/j.issn.1000-4750.2012.05.0390

混凝土二维参数化骨料模型的创建方法

三峡大学理学院，湖北，宜昌443002

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中图分类号: TU528.04
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- 刊出日期: 2013-10-24

THE APPROACH TO ESTABLISHING A TWO-DIMENSIONAL PARAMETERIZED AGGREGATE MODEL FOR CONCRERE SIMULATION

College of Science, China Three Gorges University, Yichang, Hubei 443002, China

摘要

摘要: 基于参数化骨料的特点，在混凝土二维参数化骨料模型的创建中，提出了让覆盖椭圆可以相互有重叠，骨料却相互分离的创建方法。该方法降低了骨料之间的相互排斥性，可以在创建的试件中缩小骨料之间的空隙，从而增加试件中骨料的含量，提高模型创建的速度。同时，在模型的创建中采用了按级配分级随机投放的方式，保证了骨料分布的合理性。实验表明：使用该方法能够比较快的按三级配生成含骨料75%以上的几何模型试件，可以满足大体积、全级配、高强度混凝土的骨料投放模拟要求。最后给出了力学分析实例，以说明该算法的有效性。
- 混凝土 /
- 骨料 /
- 随机投放 /
- 覆盖椭圆 /
- 级配
Abstract: To establish a two-dimensional parameterized aggregate model for concrete simulation, we propose one method, which is based on the characteristics of the parameterized aggregate, such that the coverage ellipses can be overlapped while the corresponding aggregates are separated from each other. This method reduces the mutual repulsion between different aggregates. Therefore, the specimen generated with the proposed method have narrower gap between different aggregates and contain more content of aggregates. Furthermore, the computation speed for generating the model is also improved. Meanwhile, the aggregates are put in randomly in each grading with different gradations, which guarantees the rationality of the aggregates distribution in the specimen. Numerical experiments show that, with this method, the geometrical model of specimen with the property that the aggregates content is up to 75% according to three gradations can be generated in a relatively short time. Thusly, this method can be used to simulate aggregates putting-in model to generate concretes which are in a great mass, fully-graded and high-strength. Finally, the mechanical analysis of examples is given to illustrate the effectiveness of the proposed method.
- concrete /
- aggregate /
- random packing /
- coverage elliptic /
- grading

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参考文献(24)

[1]	Wittmann F H, Roelfstra P E, Sadouki H. Simulation and analysis of composite structures [J]. Materials Science and Engineering, 1985, 68(2): 239―248.
[2]	Wang Z M, Kwan A K H, Chan H C. Mesoscopic study of concrete I: Generation of random aggregate structure and finite element mesh [J]. Computers and Structures, 1999,70: 533―544.
[3]	高政国, 刘光廷. 二维混凝土随机骨料模型研究[J]. 清华大学学报(自然科学版), 2003, 43(5): 710―714.Gao Zhengguo, Liu Guangting. Two-dimensional random aggregate structure for concrete [J]. Journal of Tsinghua University (Science & Technology), 2003, 43(5): 710―714. (in Chinese)
[4]	刘光廷, 高政国. 三维凸型混凝土骨料随机投放算法[J]. 清华大学学报(自然科学版), 2003, 43(8): 1120―1123.Liu Guangting, Gao Zhengguo. Random 3-D aggregate structure for concrete [J]. Journal of Tsinghua University (Science & Technology), 2003, 43(8): 1120―1123. (in Chinese)
[5]	郑建军, 周欣竹, 刘彦青. 混凝土骨料二维分布的模拟和应用[J]. 水利学报, 2003, 34(7): 80―84.Zheng Jianjun, Zhou Xinzhu, Liu Yanqing. Simulation of 2-D distribution of concrete aggregates and its application [J]. Journal of Hydraulic Engineering, 2003, 34(7): 80―84. (in Chinese)
[6]	张剑, 金南国, 金贤玉. 混凝土多边形骨料分布的数值模拟方法[J]. 浙江大学学报(工学版), 2004, 38(5): 581―585.Zhang Jian, Jin Nanguo, Jin Xianyu. Numerical simulation method for polygonal aggregate distribution in concrete [J]. Journal of Zhejiang University (Engineering Science), 2004, 38(5): 581―585. (in Chinese)
[7]	高巧红, 关振群, 顾元宪. 混凝土骨料有限元模型自动生成方法[J]. 大连理工大学学报, 2006, 46(5): 641―646.Gao Qiaohong, Guan Zhenqun, Gu Yuanxian. Automatic generation of finite element model for concrete aggregate [J]. Journal of Dalian University of Technology, 2006, 46(5): 641―646. (in Chinese)
[8]	孙立国, 杜成斌, 戴春霞. 大体积混凝土随机骨料数值模拟[J]. 河海大学学报(自然科学版), 2005, 33(3): 291―295.Sun Liguo, Du Chengbin, Dai Chunxia. Numerical simulation of random aggregate model for mass concrete [J]. Journal of Hohai University (Natural Sciences), 2005, 33(3): 291―295. (in Chinese)
[9]	杜成斌, 孙立国. 任意形状混凝土骨料的数值模拟及其应用[J]. 水利学报, 2006, 37(6): 662―667,673.Du Chengbin, Sun Liguo. Numerical simulation of concrete aggregates with arbitrary shapes and its application [J]. Journal of Hydraulic Engineering, 2006, 37(6): 662―667, 673. (in Chinese)
[10]	覃伟平, 杨新华, 陈传尧. 一种快速的三维凸型混凝土骨料随机投放算法[J]. 水电能源科学, 2006, 24(3): 39―42.Qin Weiping, Yang Xinhua, Chen Chuanyao. Fast random 3-D aggregate packing algorithm for concrete [J]. Water Resources and Power, 2006, 24(3): 39―42. (in Chinese)
[11]	van Mier JGM, van Vliet MRA. Influence of microstructure of concrete on size/scale effects in tensile fracture [J]. Engineering Fracture Mechanics, 2003, 70: 2281―2306.
[12]	Leite J P B, Slowik V, Mihashi H. Computer simulation of fracture processes of concrete using mesolevel models of lattice structures [J]. Cement and Concrete Research, 2004, 34(6): 1025―1033.
[13]	宋晓刚, 杨智春. 一种新的混凝土圆形骨料投放数值模拟方法[J]. 工程力学, 2010, 27(1): 154―159.Song Xiaogang, Yang Zhichun. A new method to simulate round concrete aggregate generation [J], Engineering Mechanics, 2010, 27(1): 154―159. (in Chinese)
[14]	李友云, 崔俊芝. 具有大量椭圆颗粒/空洞随机分布区域的计算机模拟及其改进三角形自动网格生成算法[J]. 计算力学学报,2004, 21(5): 540―545.Li Youyun, Cui Junzhi. Computer simulation method for the domain With large numbers of random ellipse grains/cavities and the improving automatic triangle mesh generation algorithm [J]. Chinese Journal of computational Mechanics, 2004, 21(5): 540―545. (in Chinese)
[15]	李友云, 何长洲, 崔俊芝, 龙述尧. 大量椭球颗粒随机分布三维区域的模拟及其四面体网格快速生成算法[J]. 计算力学学报,2008, 25(3): 318―325.Li Youyun, He Changzhou, Cui Junzhi, Long Shuyao. Numerical simulation on three-dimensional domains with large numbers of grains randomly distributed and fast algorithm to generate tetrahedron meshes [J]. Chinese Journal of computational Mechanics, 2008, 25(3): 318―325. (in Chinese)
[16]	Yu Y, Cui J Z, Han F, An effective computer generation method for the composites with random distribution of large numbers of heterogeneous grains [J]. Composites Science Technology, 2008, 68: 2543―2550.
[17]	Zohdi T I. Computational optimization of the vortex manufacturing of advanced materials [J]. Computer Methods in Applied Mechanics and Engineering, 2001, 190(46/47): 6231―56.
[18]	H?fner S, Eckardt S, Luther T, K?nke C. Mesoscale modeling of concrete: geometry and numerics [J]. Computers & Structures, 2006, 84: 450―61.
[19]	宋来忠, 姜袁, 彭刚. 混凝土随机参数化骨料模型及加载的数值模拟[J]. 水利学报, 2010,41(9): 93―100.Song Laizhong, Jiang Yuan, Peng Gang. Numerical simulation of concrete random parameterized aggregate model and load test [J]. Journal of Hydraulic Engineering, 2010, 41(9): 93―100. (in Chinese)
[20]	秦川, 郭长青, 张楚汉. 基于背景网格的混凝土细观力学预处理方法[J]. 水利学报,2011, 42(8)：841―948.Qin Chuan, Guo Changqing, Zhang Chuhan. A pre-processing scheme based on background grid approach for meso-concrete mechanics [J]. Journal of Hydraulic Engineering, 2011, 42(8): 841―948. (in Chinese)
[21]	Walaraven J C, Reinhardt H W. Theory and experiments on the mechanical behavior of cracks in plain and reinforced concrete subjected to shear loading [J]. HERON, 1991, 26(1A): 26―35.
[22]	方秦, 张锦华, 还毅, 张亚栋. 全级配混凝土三维细观模型的建模方法研究[J]. 工程力学, 2013, 30(1): 14―21, 30.Fang Qin, Zhang Jinhua, Huan Yi, Zhang Yadong. The investigation into three-dimension mesoscale modelling of fully-graded concrete [J]. Engineering Mechanics, 2013, 30(1): 14―21, 30. (in Chinese)
[23]	杜修力, 金浏. 混凝土材料细观单元弹模非均匀统计特性研究[J]. 工程力学, 2012, 29(10): 106―115.Du Xiuli, Jin Liu. Research on the heterogeneous statistic properties of elasyic modulus of a concrete meso-scale unit [J]. Engineering Mechanics, 2012, 29(10): 106―115. (in Chinese)
[24]	王娟, 李庆斌, 卿龙邦, 管俊峰. 基于细观结构统计特征的混凝土几何代表体尺寸研究[J]. 工程力学, 2012, 29(12): 1―6.Wang Juan, Li Qingbin, Qing Longbang, Guan Junfeng. Syudies on representative volume element size of concrete based on meso-stucture statics [J]. Engineering Mechanics, 2012, 29(12): 1―6. (in Chinese)

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文章访问数: 313
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混凝土二维参数化骨料模型的创建方法

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出版历程

THE APPROACH TO ESTABLISHING A TWO-DIMENSIONAL PARAMETERIZED AGGREGATE MODEL FOR CONCRERE SIMULATION

计量

出版历程

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