摘要
基于磁介质理论,根据钢筋混凝土结构中钢筋与铁锈、混凝土、水等成分的不同磁导率特征,采用数值模拟方法分析钢筋对空间磁场分布的影响。分析结果表明,钢筋对其周围磁场强度有显著的增强作用,随着钢筋直径的减小,增强作用逐渐减弱。根据数值模拟结果,设计了MCD钢筋锈蚀检测传感器,并对混凝土中钢筋锈蚀过程进行了监测。试验结果表明,仪器能够动态、定量化表征钢筋锈蚀率,检测结果具有较高的精度。
Based on the theory of magnetic media,numerical simulation method is used to analyze the influence of steel bars on the spatial magnetic field distribution according to the different magnetic permeability characteristics of steel bars,rust,concrete and water in reinforced concrete structures.The analysis results show that the steel bar has a significant enhancement to the magnetic field strength around it.As the diameter of the steel bar decreases,the reinforcement effect is gradually weakened.According to the numerical simulation results,the MCD steel corrosion detection sensor was designed and the corrosion process of steel reinforcement in concrete was monitored.The test results show that the instrument can dynamically and quantitatively characterize the corrosion rate of steel bars,and the test results have high precision.
作者
高荣森
金南国
田野
李宗津
GAO Rongsen;JIN Nanguo;TIAN Ye;LI Zongjin(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310029,China;Institute of Applied Physics and Materials Engineering,University of Macao,Macao 999078,China)
出处
《低温建筑技术》
2019年第3期1-3,7,共4页
Low Temperature Architecture Technology
基金
973计划(2015CB655103)
国家自然科学基金资助项目(51578497)
中央高校基本科研业务费(2017FZA4017)
关键词
磁导率
钢筋锈蚀
数值模型
MCD检测传感器
magnetic permeability
steel corrosion
numerical model
MCD detection sensor
