[1]何宝睿,刘小娟,苏龙辉,等.不均匀锈蚀钢筋截面分布特征与拉伸数值模拟[J].华侨大学学报(自然科学版),2024,45(2):186-192.[doi:10.11830/ISSN.1000-5013.202312045]
　HE Baorui,LIU Xiaojuan,SU Longhui,et al.Cross-Section Distribution Feature and Tensile Numerical Simulation of Non-Uniform Corroded Steel Bars[J].Journal of Huaqiao University(Natural Science),2024,45(2):186-192.[doi:10.11830/ISSN.1000-5013.202312045]
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不均匀锈蚀钢筋截面分布特征与拉伸数值模拟()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第45卷
期数:
2024年第2期
页码:
186-192
栏目:
出版日期:
2024-03-20

文章信息/Info

Title:
Cross-Section Distribution Feature and Tensile Numerical Simulation of Non-Uniform Corroded Steel Bars
文章编号:
1000-5013(2024)02-0186-07
作者:
何宝睿1;  刘小娟1; 2;  苏龙辉3;  洪秀君4;  陈业伟5
1. 华侨大学 土木工程学院, 福建 厦门 361021;2. 华侨大学 福建省结构工程与防灾重点实验室, 福建 厦门 361021;3. 中建协和建设有限公司, 福建 泉州 362700;4. 福建磊鑫(集团)有限公司, 福建 厦门 361000;5. 中建四局建设发展有限公司, 福建 厦门 361006
Author(s):
HE Baorui1;  LIU Xiaojuan1; 2;  SU Longhui3; HONG Xiujun4;  CHEN Yewei5
1. College of Civil Engineering, Huaqiao University, Xiamen 361021, China; 2. Key Laboratory of Structural Engineering and Disaster Prevention of Fujian Province, Huaqiao University, Xiamen 361021, China; 3. China Architectural Xiehe Construction Limited Company, Quanzhou 362700, China; 4. Fujian Leixin(Group)Limited Company, Xiamen 361000, China; 5. China Architectural Fourth Bureau Construction Development Limited Company, Xiamen 361006, China
关键词:
非均匀锈蚀;  3D扫描;  截面分布特征;  数值模拟;  力学性能
Keywords:
non-uniform corrosion;  3D scanning;  cross-sectional distribution feature;  numerical simulation;  mechanical property
分类号:
TU511.3
DOI:
10.11830/ISSN.1000-5013.202312045
文献标志码:
A
摘要:
为研究锈蚀钢筋剩余截面积的分布规律,以及非均匀锈蚀对钢筋力学性能的影响,采用通电加速锈蚀试验获取锈蚀钢筋。通过3D扫描获取锈蚀钢筋的剩余截面积数据和3D实体模型,对剩余截面积进行统计分析,并基于3D扫描模型进行数值模拟。结果表明:剩余截面积沿纵向分布的不均匀性随锈蚀程度增加而显著增强;对平均截面锈蚀率在20.00%以下的钢筋,可采用正态分布模型对其剩余截面积概率分布进行拟合,对平均截面锈蚀率在20.00%以上的钢筋,其剩余截面积概率分布可选用Weibull分布模型;钢筋名义屈服强度、名义极限强度和名义极限应变均随平均截面锈蚀率的增大而降低;在钢筋截面锈损严重处出现应力集中现象,导致锈蚀钢筋力学性能退化。
Abstract:
To study the distribution of residual cross-sectional area of corroded steel bars and the effect of non-uniform corrosion on the mechanical properties of steel bars, the corroded steel bars are obtained by electric accelerated corrosion test. The residual cross-sectional area data and 3D solid model of the corroded steel bars are obtained by 3D scanning, the residual cross-sectional area is analyzed statistically, and numerical simulation is carried out base on 3D scanning model. The results show that the non-uniformity of residual cross-sectional area along the longitudinal direction increases significantly with the increase of corrosion degree. For steel bars with average cross-sectional corrosion rate <20.00%, the normal distribution model can be used to fit the probability distribution of the residual cross-sectional area, and for steel bars with average cross-sectional corrosion rate >20.00%, Weibull distribution model can be used to fit the probability distribution of the residual cross-sectional area. Nominal yield strength, nominal ultimate strength and nominal ultimate strain of steel bars decrease with the increase of average cross-sectional corrosion rate. The stress concentration occurs at areas with severe rust damage, which leads to the degradation of mechanical properties of the corroded steel bars.

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备注/Memo

备注/Memo:
收稿日期: 2023-12-29
通信作者: 刘小娟(1985-),女,博士,副教授,主要从事混凝土结构耐久性及工程结构抗震的研究。 E-mail:liuxjty@hqu.edu.cn。
基金项目: 国家自然科学基金资助项目(51808236, 51978526); 福建省自然科学基金资助项目(2021J01282); 福建省住房和城乡建设行业科技研究开发项目(2022-K-157, 2022-K-261); 华侨大学科研启动费项目(17BS204)http://www.hdxb.hqu.edu.cn
更新日期/Last Update: 2024-03-20