再生砂粉混凝土抗压强度与细观损伤研究

摘要/Abstract

摘要： 为研究再生砂粉混凝土的力学性能及细观损伤,本文基于Python语言对ABAQUS软件进行了二次开发编程,建立了考虑骨料、新老砂浆基体和界面过渡区的多相三维混凝土有限元模型,并通过抗压强度试验验证有限元模型的有效性。结果表明,本文建立的再生砂粉混凝土细观模型可有效模拟其力学性能和细观损伤情况,抗压强度实测值与模拟值的误差较小,不超过10.65%;再生砂粉混凝土试块破坏整体呈“X”形式,与试验现象基本一致,初始损伤出现在界面过渡区处,然后逐渐发展直至贯通,随着再生细骨料及再生微粉含量的增多,其损伤扩展程度更加严重,并且其力学性能也随之下降。

关键词: 再生砂粉混凝土, 多相模型, 数值模拟, 有限元模型, 力学性能, 细观损伤, 随机骨料

Abstract: To investigate the mechanical properties and microscopic damage evolution of recycled sand/powder concrete, ABAQUS based on Python language was used to establish a multi-phase three-dimensional finite element model considering virgin aggregate, old/new mortar matrix and corresponding interfacial transition zones. The effectiveness of the model was verified by compressive tests on recycled sand/powder concrete samples. The results show that the microscopic model of recycled sand/powder concrete established in this study efficaciously simulates its mechanical properties and microscopic damage circumstances. The discrepancy between the measured and simulated compressive strength is minimal, not exceeding 10.65%. The destruction of recycled sand/powder concrete specimen is generally in an “X” shape, which is fundamentally consistent with experimental phenomenon. The initial damage emerges in interface transition zone and subsequently develops progressively until it penetrates. As the content of recycled fine aggregate and recycled micro powder increases, the extent of damage expansion becomes more severe, and its mechanical properties correspondingly decline.

Key words: recycled sand/powder concrete, multi-phase model, numerical simulation, finite element model, mechanical property, damage distribution, random aggregate

中图分类号:

TU528

马泉, 肖建庄, 田丰, 晏文品, 宋敏, 付杰, 杨超, 曹雪. 再生砂粉混凝土抗压强度与细观损伤研究[J]. 硅酸盐通报, 2023, 42(11): 4042-4050.

MA Quan, XIAO Jianzhuang, TIAN Feng, YAN Wenpin, SONG Min, FU Jie, YANG Chao, CAO Xue. Compressive Strength and Microscopic Damage of Recycled Sand/Powder Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(11): 4042-4050.

参考文献

[1] 肖建庄, 李佳彬, 孙振平, 等. 再生混凝土的抗压强度研究[J]. 同济大学学报(自然科学版), 2004, 32(12): 1558-1561.
XIAO J Z, LI J B, SUN Z P, et al. Study on compressive strength of recycled aggregate concrete[J]. Journal of Tongji University (Natural Science), 2004, 32(12): 1558-1561 (in Chinese).
[2] 肖建庄, 范玉辉, 林壮斌. 再生细骨料混凝土抗压强度试验[J]. 建筑科学与工程学报, 2011, 28(4): 26-29.
XIAO J Z, FAN Y H, LIN Z B. Experiment on compressive strength of recycled fine aggregate concrete[J]. Journal of Architecture and Civil Engineering, 2011, 28(4): 26-29 (in Chinese).
[3] 陈立俊, 李滢, 陈文浩. 再生微粉与矿物掺合料对混凝土力学性能及微观结构的影响[J/OL]. 材料导报, 2024(5):1-13 [2023-08-07]. http://kns.cnki.net/kcms/detail/50.1078.TB.20230316.1240.018.html.
CHEN L Y, LI Y, CHEN W H. Influence of recycled micro-powder and mineral admixtures on the mechanical properties and microstructure of concrete[J/OL]. Materials Reports, 2024 (5): 1-13 [2023-08-07]. http://kns.cnki.net/kcms/detail/50.1078.TB.20230316.1240.018.html (in Chinese).
[4] 姚泽良, 祁亚伦, 令狐恬晶, 等. 含砖再生混凝土细观损伤机理数值模拟研究[J]. 水电能源科学, 2023, 41(3): 149-153.
YAO Z L, QI Y L, LINGHU T J, et al. Numerical simulation study on meso-damage mechanism of recycled concrete with bricks[J]. Water Resources and Power, 2023, 41(3): 149-153 (in Chinese).
[5] PENG Y J, LIU Y H, PU J W, et al. Application of base force element method to mesomechanics analysis for recycled aggregate concrete[J]. Mathematical Problems in Engineering, 2013, 2013: 1-8.
[6] PENG Y J, CHU H, PU J W. Numerical simulation of recycled concrete using convex aggregate model and base force element method[J]. Advances in Materials Science and Engineering, 2016, 2016: 1-10.
[7] 国家市场监督管理总局, 国家标准化管理委员会. 建设用砂: GB/T 14684—2022[S]. 北京: 中国标准出版社, 2022.
National Administration for Market Regulation, National Standardization Management Committee. Construction sand: GB/T 14684—2022[S]. Beijing: China Standard Press, 2022 (in Chinese).
[8] 国家市场监督管理总局, 国家标准化管理委员会. 建设用卵石、碎石: GB/T 14685—2022[S]. 北京: 中国标准出版社, 2022.
National Administration for Market Regulation, National Standardization Management Committee. Construction gravel and crushed stone: GB/T 14685—2022[S]. Beijing: China Standard Press, 2022 (in Chinese).
[9] 国家质量监督检验检疫总局, 中国国家标准化管理委员会. 混凝土和砂浆用再生细骨料: GB/T 25176—2010[S]. 北京: 中国标准出版社, 2011.
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, and the Standardization Administration of China. Recycled fine aggregate for concrete and mortar: GB/T 25176—2010[S]. Beijing: China Standard Press, 2011 (in Chinese).
[10] 汪奔, 王弘, 张志强, 等. 基于网格生成的随机凹凸型混凝土骨料细观建模方法[J]. 计算力学学报, 2017, 34(5): 591-596.
WANG B, WANG H, ZHANG Z Q, et al. Mesoscopic modeling method of concrete aggregates with arbitrary shapes based on mesh generation[J]. Chinese Journal of Computational Mechanics, 2017, 34(5): 591-596 (in Chinese).
[11] 杜敏, 金浏, 李冬, 等. 骨料粒径对混凝土劈拉性能及尺寸效应影响的细观数值研究[J]. 工程力学, 2017, 34(9): 54-63.
DU M, JIN L, LI D, et al. Mesoscopic simulation study of the influence of aggregate size on mechanical properties and specimen size effect of concrete subjected to splitting tensile loading[J]. Engineering Mechanics, 2017, 34(9): 54-63 (in Chinese).
[12] 张潞伟. 含砖再生骨料混凝土抗压强度试验及数值模拟[D]. 西安: 长安大学, 2022.
ZHANG L W. Compressive strength test and numerical simulation of recycled aggregate concrete containing bricks[D]. Xi'an: Chang'an University, 2022 (in Chinese).
[13] 肖建庄, 袁俊强, 李龙. 模型再生混凝土单轴受压动态力学特性试验[J]. 建筑结构学报, 2014, 35(3): 201-207.
XIAO J Z, YUAN J Q, LI L. Experimental study on dynamic mechanical behavior of modeled recycled aggregate concrete under uniaxial compression[J]. Journal of Building Structures, 2014, 35(3): 201-207 (in Chinese).
[14] 刘琼. 再生混凝土破坏机理的试验研究和格构数值模拟[D]. 上海: 同济大学, 2010.
LIU Q. Experimental study on failure mechanism of recycled concrete and lattice numerical simulation[D]. Shanghai: Tongji University, 2010 (in Chinese).
[15] 中华人民共和国住房和城乡建设部. 混凝土结构设计规范: GB 50010—2010[S]. 北京: 中国建筑工业出版社, 2011.
China Academy of Building Research. Code for design of concrete structures: GB 50010—2010[S]. Beijing: China Architecture & Building Press, 2011 (in Chinese).
[16] 中华人民共和国住房和城乡建设部. 普通混凝土配合比设计规程: JGJ 55—2011[S]. 北京: 中国建筑工业出版社, 2011.
China Academy of Building Research. Code for design of concrete mix proportion: JGJ 55—2011[S]. Beijing: China Architecture & Building Press, 2011 (in Chinese).
[17] 中华人民共和国住房和城乡建设部, 国家市场监督管理总局. 混凝土物理力学性能试验方法标准: GB/T 50081—2019[S]. 北京: 中国建筑工业出版社, 2011.
China Academy of Building Research, State Administration of Market Supervision. Standard test method for mechanical properties of concrete: GB/T 50081—2019[S]. Beijing: China Architecture & Building Press, 2011 (in Chinese).