[1]许文祥,陈惠苏.多尺度椭圆形集料尺寸分布对混凝土边界效应的影响[J].东南大学学报(自然科学版),2011,41(5):1048-1053.[doi:10.3969/j.issn.1001-0505.2011.05.029]
 Xu Wenxiang,Chen Huisu.Influence of size distribution of multiscale elliptical aggregates on wall effect of concrete[J].Journal of Southeast University (Natural Science Edition),2011,41(5):1048-1053.[doi:10.3969/j.issn.1001-0505.2011.05.029]
点击复制

多尺度椭圆形集料尺寸分布对混凝土边界效应的影响()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第5期
页码:
1048-1053
栏目:
材料科学与工程
出版日期:
2011-09-20

文章信息/Info

Title:
Influence of size distribution of multiscale elliptical aggregates on wall effect of concrete
作者:
许文祥陈惠苏
(东南大学材料科学与工程学院,南京 211189)(东南大学江苏省土木工程材料重点实验室,南京 211189)
Author(s):
Xu WenxiangChen Huisu
(School of Material Science and Engineering, Southeast University, Nanjing 211189, China)
(Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China)
关键词:
多尺度椭圆形集料等体积分布固相体积分数面积分数边界效应
Keywords:
multi-sized elliptical aggregate equal volume fraction distribution solid volume fraction area fraction wall effect
分类号:
TB321
DOI:
10.3969/j.issn.1001-0505.2011.05.029
摘要:
为了探讨集料对混凝土边界效应的影响机理,利用计算机模拟技术,分析了在等体积分数分布下多尺度椭圆形集料的最大粒径和面积分数对混凝土边界效应的影响.基于体视学理论,在构造的多尺度椭圆形集料随机堆积模型中,采用线采样的方法获取模型化混凝土结构的固相体积分数.模拟结果显示,混凝土结构中固相体积分数曲线形状和界面过渡区厚度随集料最大粒径增大而发生变化.通过统计分析得出集料面积分数的变化不改变固相体积分数的曲线形状,但是,界面过渡区厚度随集料面积分数的变化而发生改变.基于模拟结果,利用数学拟合方法给出了集料的固相体积分数表达式.
Abstract:
To investigate the effect of aggregates on the wall effect of concrete, influence of the maximum size and the area fraction of multi-sized elliptical aggregates with equal volume fraction distribution on the wall effect of concrete are presented by computer simulation. Based on stereological theorems, the method of linear sampling is applied to derive the volume fraction of solid phase in the model of the multi-sized elliptical aggregate random packing. The results of simulation show that the shape of the solid volume fraction curves and thicknesses of interfacial transition zone are changing as the maximum size of aggregates ascending. Based on the statistic analysis, the shape of the solid volume fraction curves are similar for different area fractions of aggregates. However, thicknesses of interfacial transition zone vary with the area fractions of aggregates. Finally, based on these simulation results, the solid volume fraction of aggregate is expressed by mathematical regression.

参考文献/References:

[1] Zheng J J.Mesostructure of concrete-stereological analysis and some mechanical implications [D].Delft,the Nederlands:Department of Civil Engineering and Geosciences,Delft University of Technology,2000.
[2] Russ J C,Dehoff R T.Practical stereology [M].2nd ed.New York:Plenum Press,1999.
[3] Kreijger P C.The skin of concrete composition and properties [J].Materials and Structures,1984,17(100):275-283.
[4] 杨进波,阎培渝.混凝土边界效应层中粗骨料的分布特征[J].建筑材料学报,2009,12 (5):580-583.
  Yang Jinbo,Yan Peiyu.Distribution characteristics of coarse aggregate in wall-affecting layer of concrete [J].Journal of Building Materials,2009,12(5):580-583.(in Chinese)
[5] Stroeven M.Discrete numerical modelling of composites materials [D].Delft,the Nederlands:Department of Civil Engineering and Geosciences,Delft University of Technology,1999.
[6] Zheng J J,Li C Q,Zhao L Y.Simulation of two-dimensional aggregate distribution with wall effect [J].ASCE Journal of Materials in Civil Engineering,2003,15(5):506-510.
[7] Xu W X,Chen H S,Lü Z.An overlapping detection algorithm for random sequential packing of elliptical particles [J].Physica A:Statistical Mechanics and its Applications,2011,390(13):2452-2467.
[8] Chen H,Sun W,Stroeven P,et al.Analytical solution of the nearest surface spacing between neighboring aggregate grains in cementitious composites [J].Journal of the Chinese Ceramic Society,2005,33(7):859-863.
[9] Xu W X,Chen H S.A numerical algorithm for detecting inter-ellipse particles overlapping [C]//Proceedings of The First International Conference on Advances in Interaction &Multiscale Mechanics.Seoul,2010:1358-1371.
[10] 陈惠苏,孙伟,Stroeven P,等.混凝土中邻近集料表面最近间距分布的计算机模拟 [J].硅酸盐学报,2004,32 (4):429-435.
  Chen Huisu,Sun Wei,Stroeven P,et al.Computer simulation of the nearest surface distance distribution between neighbor aggregate grains in concrete [J].Journal of the Chinese Ceramic Society,2004,32(4):429-435.(in Chinese)
[11] Neville A M.Properties of concrete [M].4th ed.New York:John Wiley &Sons,1995.
[12] Zheng J J,Li C Q.Three-dimensional aggregate density in concrete with wall effect [J].ACI Materials Journal,2002,99(6):568-575.
[13] Xu W X,Chen H S,Lü Z.A 2D elliptical model of random packing for aggregates in concrete [J].Journal of Wuhan University of Technology:Materials Science Edition,2010,25(4):717-720.
[14] Nawy E G.Fundamentals of high performance concrete [M].2nd ed.New York:John Wiley &Sons,2001.
[15] 赵良颖,郑建军,周欣竹,等.二维骨料分布边界效应的计算机模拟[J].建筑材料学报,2003,6 (3):301-307.
  Zhao Liangying,Zheng Jianjun,Zhou Xinzhu,et al.Computer simulation of two-dimensional aggregate distribution with wall effect [J].Journal of Building Materials,2003,6(3):301-307.(in Chinese)

备注/Memo

备注/Memo:
作者简介:许文祥(1983—),男,博士生;陈惠苏(联系人),男,博士,教授,博士生导师,chenhs@seu.edu.cn.
基金项目:国家自然科学基金资助项目(50708018)、国家重点基础研究发展计划 (973计划) 资助项目(2009CB623203)、高等学校博士学科点专项科研基金资助项目(20070286018)、东南大学优秀博士学位论文基金资助项目(YBJJ1115).
引文格式: 许文祥,陈惠苏.多尺度椭圆形集料尺寸分布对混凝土边界效应的影响[J].东南大学学报:自然科学版,2011,41(5):1048-1053.[doi:10.3969/j.issn.1001-0505.2011.05.029]
更新日期/Last Update: 2011-09-20