含孔隙混凝土二维细观建模方法研究

陈青青; 张煜航; 张杰; 王志勇; 王志华

doi:10.21656/1000-0887.400058

含孔隙混凝土二维细观建模方法研究

doi: 10.21656/1000-0887.400058

太原理工大学机械与运载工程学院应用力学研究所;材料强度与结构冲击山西省重点实验室, 太原 030024

基金项目: 国家自然科学基金(11702186;11390361;11390362)

详细信息

作者简介:
陈青青（1993—），女，硕士生(E-mail: chenqingqing_5@163.com);王志勇（1982—），男，博士(通讯作者. E-mail: wangzhiyong@tyut.edu.cn).

中图分类号: TU37|TU528
计量
- 文章访问数: 1556
- HTML全文浏览量: 271
- PDF下载量: 408
- 被引次数: 0
出版历程
- 收稿日期: 2019-02-25
- 修回日期: 2019-04-18
- 刊出日期: 2020-02-01

Study on a 2D Mesoscopic Modeling Method for Concrete With Voids

Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering; Shanxi Key Laboratory of Material Strength & Structural Impact, Taiyuan University of Technology, Taiyuan 030024, P.R.China

Funds: The National Natural Science Foundation of China(11702186;11390361;11390362)

摘要

摘要: 根据混凝土的细观组成和结构特点，对传统二维建模方法加以继承与改进，提出了一种高效的分步入侵判定算法.将孔隙直观地反映在模型中，建立了不同的含孔隙混凝土细观模型.对含圆形、椭圆形、多边形骨料与圆形、椭圆形孔隙的混凝土标准试件分别进行了建模研究，结果表明本文的算法具有较强适用性.同时，通过对不同面积率与多种形状骨料/孔隙混凝土的大量建模进一步验证了该算法的效率.模拟了混凝土试件在单轴压缩下的准静态力学性能，分析了混凝土内部孔隙对其裂纹扩展的主要路径、破坏模式以及宏观力学性能的显著影响.
- 混凝土 /
- 细观结构 /
- 孔隙 /
- 入侵判定 /
- 裂纹扩展
Abstract: According to the meso-structure of concrete, a high-efficiency stepwise overlap checking method was proposed based on traditional 2D modeling. Voids were introduced directly into the models and different concrete meso-structures were generated. The method involves various models containing circular, elliptical or polygonal aggregates and circular or elliptical voids. Meanwhile, several modeling examples based on different area fractions and different shapes of aggregates and voids were given to prove the computation efficiency of the proposed algorithm. At last, the mechanical behaviors of standard concrete specimens under uniaxial compression were simulated. The effects of internal voids on the main paths of crack propagation, concrete failure modes and macroscopic mechanical performances were analyzed.
- concrete /
- meso-structure /
- void /
- overlap checking /
- crack propagation

HTML全文

参考文献(21)

[1]	马怀发, 陈厚群, 黎保琨. 混凝土试件细观结构的数值模拟[J]. 水利学报, 2004,35(10): 27-35.(MA Huaifa, CHEN Houqun, LI Baokun. Meso-structure numerical simulation of concrete specimens[J]. Journal of Hydraulic Engineering,2004,35(10): 27-35.(in Chinese))
[2]	ROELFSTRA P E, SADOUKI H, WITTMANN F H. Le beton numerique[J]. Material and Structure,1985,18: 327-335.
[3]	SCHLANGEN E, VAN MIER J G M. Simple lattice model for numerical simulation of fracture of concrete materials and structures[J]. Materials and Structure,1992,〖STHZ〗 25(9): 534-542.
[4]	BAZANT Z P, TABBARA M R, KAZEMI M T, et al. Random particle model for fracture of aggregate or fiber composites[J]. ASCE Journal of Engineering Mechanics,1990,116(8): 1686-1705.
[5]	唐欣薇, 张楚汉. 基于改进随机骨料模型的混凝土细观断裂模拟[J]. 清华大学学报(自然科学版), 2008,48(3): 348-351.(TANG Xinwei, ZHANG Chuhan. Simulation of meso-fracture for concrete based on the developed random aggregate model[J]. Journal of Tsinghua University(Science and Technology),2008,48(3): 348-351.(in Chinese))
[6]	朱万成, 唐春安, 赵文, 等. 混凝土试样在静态载荷作用下断裂过程的数值模拟研究[J]. 工程力学, 2002,19(6): 148-153.(ZHU Wancheng, TANG Chun’an, ZHAO Wen, et al. Numerical simulation on the fracture process of concrete specimen under static loading[J]. Engineering Mechanics,2002,19(6): 148-153.(in Chinese))
[7]	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 and Technology),2003,43(5): 710-714.(in Chinese))
[8]	刘光廷, 高政国. 三维凸形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 and Technology),2003,43(8): 1120-1123.(in Chinese))
[9]	ZHANG J, WANG Z Y, YANG H W, et al. 3D meso-scale modeling of reinforcement concrete with high volume fraction of randomly distributed aggregates[J]. Construction and Building Materials,2018,164: 350-361.
[10]	李天一, 章青, 夏晓舟, 等. 考虑混凝土材料非均质特性的近场动力学模型[J]. 应用数学和力学, 2018,39(8): 913-924.(LI Tianyi, ZHANG Qing, XIA Xiaozhou, et al. A peridynamic model for heterogeneous concrete materials[J]. Applied Mathematics and Mechanics,2018,39(8): 913-924.(in Chinese))
[11]	赵吉坤. 混凝土四相复合模型的三维细观破坏模拟[J]. 土木建筑与环境工程, 2009,31(4): 37-43.(ZHAO Jikun. 3D meso-scale failure simulation of four-phase composite concrete[J]. Journal of Civil, Architectural and Environmental Engineering,2009,31(4): 37-43.(in Chinese))
[12]	杜成斌, 尚岩. 三级配混凝土静、动载下力学细观破坏机制研究[J]. 工程力学, 2006,23(3): 141-146.(DU Chengbin, SHANG Yan. Study on micro-mechanical failure mechanism of the three-gradation concrete under static and dynamic loadings[J]. Engineering Mechanics,2006,23(3): 141-146.(in Chinese))
[13]	王娟, 李庆斌, 卿龙邦, 等. 混凝土单轴抗压强度三维细观数值仿真[J]. 工程力学, 2014,31(3): 39-44.(WANG Juan, LI Qingbin, QING Longbang, et al. 3D simulation of concrete strength under uniaxial compressive load[J]. Engineering Mechanics,2014,31(3): 39-44.(in Chinese))
[14]	KUMAR R, BHATTACHARJEE B. Porosity, pore size distribution and in situ strength of concrete[J]. Cement and Concrete Research,2003,33(1): 155-164.
[15]	杜修力, 金浏. 考虑孔隙及微裂纹影响的混凝土宏观力学特性研究[J]. 工程力学, 2012,29(8): 101-107.(DU Xiuli, JIN Liu. Research of the influence of pores and micro-cracks on the marcro-mechanical properties of concrete[J]. Engineering Mechanics,2012,29(8): 101-107.(in Chinese))
[16]	WALRAVEN 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.
[17]	伍君勇. 混凝土细观结构的自动生成[D]. 硕士学位论文. 大连: 大连理工大学, 2006.(WU Junyong. Automatic generation of meso-structure of concrete[D]. Master Thesis. Dalian: Dalian University of Technology, 2006.(in Chinese))
[18]	MORA C F, KWAN A K H. Sphericity, shape factor, and convexity measurement of coarse aggregate for concrete using digital image processing[J]. Cement and Concrete Research,2000,30(3): 351-358.(in Chinese))
[19]	方秦, 还毅, 张亚栋, 等. ABAQUS混凝土损伤塑性模型静力性能分析[J]. 解放军理工大学学报(自然科学版), 2007,8(3): 254-260.(FANG Qin, HUAN Yi, ZHANG Yadong, et al. Investigation into static properties of damaged plasticity model of concrete in ABAQUS[J]. Journal of PLA University of Science and Technology(Nature Science Edition),2007,8(3): 254-260.(in Chinese))
[20]	张煜航, 陈青青, 张杰, 等. 混凝土三维细观模型的建模方法与力学特性分析[J]. 爆炸与冲击, 2019,39(5): 054205.(ZHANG Yuhang, CHEN Qingqing, ZHANG Jie, et al. 3D mesoscale modeling method and dynamic mechanical properties investigation of concrete[J]. Explosion and Shock Waves,2019,39(5): 054205.(in Chinese))
[21]	尚世明. 普通混凝土多轴动态性能试验研究[D]. 博士学位论文. 大连: 大连理工大学, 2013.(SHANG Shiming. Experimental study on the multi-axial dynamic behavior of plain concrete[D]. PhD Thesis. Dalian: Dalian University of Technology, 2013.(in Chinese))