[1]黄一凡,王向东.再生混凝土受压细观损伤尺寸效应分析[J].华侨大学学报(自然科学版),2021,42(3):298-304.[doi:10.11830/ISSN.1000-5013.202010032]
　HUANG Yifan,WANG Xiangdong.Analysis of Meso Damage Size Effect of Recycled Concrete Under Compression[J].Journal of Huaqiao University(Natural Science),2021,42(3):298-304.[doi:10.11830/ISSN.1000-5013.202010032]
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再生混凝土受压细观损伤尺寸效应分析()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第42卷
期数:
2021年第3期
页码:
298-304
栏目:
出版日期:
2021-05-20

文章信息/Info

Title:
Analysis of Meso Damage Size Effect of Recycled Concrete Under Compression
文章编号:
1000-5013(2021)03-0298-07
作者:
黄一凡;  王向东
河海大学 力学与材料学院, 江苏 南京 211100
Author(s):
HUANG Yifan;  WANG Xiangdong
College of Mechanics and Materials, Hohai University, Nanjing 211100, China
关键词:
细观损伤;  再生混凝土;  随机骨料模型;  单轴压缩;  尺寸效应
Keywords:
meso damage;  recycled concrete;  random aggregate model;  uniaxial compression;  size effect
分类号:
TU528.0
DOI:
10.11830/ISSN.1000-5013.202010032
文献标志码:
A
摘要:
在细观层次上建立由天然骨料、旧界面、旧水泥砂浆、新界面和新水泥砂浆组成的再生混凝土五相随机骨料模型.对建立的模型进行单轴压缩和损伤断裂的细观数值模拟,研究尺寸效应对细观损伤和力学性能的影响.结果表明:随着试件尺寸从75 mm×75 mm增加到100 mm×100 mm和150 mm×150 mm,试件抗压强度分别下降了4.5%和8.3%;在所有试件中,初始损伤和拉剪应力都先集中出现在内界面区,但随着尺寸的增大,试件最终的损伤值也随之降低.
Abstract:
At the meso level, a five phase random aggregate model of recycled concrete is established, which is composed of natural aggregate, old interface, old cement mortar, new interface and new cement mortar. The meso numerical simulation of uniaxial compression and damage fracture of the model is carried out, and the effect of size on the meso damage and mechanical properties is studied. The results show that the compressive strength decreases by 4.5% and 8.3% with the increase of specimen size from 75 m×75 m to 100 m×100 m and 150 m×150 m, respectively. In all specimens, the initial damage and tensile shear stress concentration firstly appear in the inner interface region, but with the increase of the size, the ultimate damage value of the specimen decreases.

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备注/Memo

备注/Memo:
收稿日期: 2020-10-03
通信作者: 王向东(1965-),女,教授,博士,主要从事工程断裂与损伤的研究.E-mail:wangxdxd@163.com.
基金项目: 国家自然科学基金资助项目(50878077)
更新日期/Last Update: 2021-05-20