基于磁感应链的钢筋混凝土应力状态检测方法研究

张志建; ZHANG Zhijian; 张奔牛; ZHANG Benniu

doi:10.48014/ems.20250513001

基于磁感应链的钢筋混凝土应力状态检测方法研究

Research on Stress State Detection Method of Reinforced Concrete Based on Magnetic Induction Chain

工程材料与结构 2025年第4卷第2期页码[47-53] 下载全文[1.9MB]

摘要

钢筋混凝土结构的应力状态是评估其安全性能与健康状况的核心指标。传统应力检测方法存在局限性, 如仅能测量相对应力、难以深入材料内部探测, 或在役结构预应力无法直接测量。针对现有技术的不足, 本文提出了一种基于磁感应链的新型钢筋混凝土应力状态检测方法。该方法通过在混凝土表面布置外加磁场装置与霍尔传感器, 利用磁场渗透磁化内部钢筋并形成磁感应链, 结合远程磁场测量技术监测磁场变化, 实现对钢筋应力状态的实时、非破坏性检测。通过建立力磁耦合关系的数学模型, 解析磁感应强度变化与应力之间的关联, 从而量化评估结构应力状态。进一步地, 通过实验结构与待测结构的磁感应强度对比标定法, 可间接推导在役结构中的预应力水平。研究结果表明, 该方法具有灵敏度高、可靠性强、易于数字化输出等优势, 能够有效克服传统方法的材料分散性问题, 直观展示钢筋在不同应力状态下的变化, 为实时、准确的结构检测提供了新途径。

Abstract

The stress state of reinforced concrete structures is a core indicator for evaluating their safety performance and health status. Traditional stress detection methods have limitations, such as being able to measure only relative stress, being difficult to detect deep inside materials, or being unable to directly measure the prestress of in-service structures. In view of the deficiencies of the existing technology, this paper proposes a new method for detecting the stress state of reinforced concrete based on magnetic induction chain. This method uses an external magnetic field device and Hall sensors on the concrete surface to penetrate and magnetize the internal steel bars using magnetic fields, forming a magnetic induction chain. Combined with remote magnetic field measurement technology, it monitors magnetic field changes to achieve real-time, non-destructive detection of the stress state of the steel bars. By establishing a mathematical model of the force-magnetic coupling relationship, the correlation between changes in magnetic induction intensity and stress is analyzed, allowing for quantitative assessment of the structural stress state. Furthermore, the prestress level in the in-service structure can be indirectly deduced by comparing the magnetic induction intensity between the experimental structure and the structure to be tested using a calibration method. The research results show that this method has the advantages of high sensitivity, strong reliability, and easy digital output, and can effectively overcome the material dispersion problem of traditional methods, visually display the changes of steel bars under different stress states, and provide a new approach for real-time and accurate structural detection.

DOI

10.48014/ems.20250513001

文章类型

研究性论文

收稿日期

2025-05-13

接收日期

2025-06-03

出版日期

2025-06-28

关键词

磁感应链, 钢筋混凝土, 应力状态检测, 预应力, 力磁耦合, 非破坏性检测

Keywords

Magnetic induction chain, reinforced concrete, stress state detection, prestress, force magnetic coupling, non-destructive testing

作者

张志建, 张奔牛^*

Author

ZHANG Zhijian, ZHANG Benniu^*

所在单位

重庆交通大学土木工程学院, 重庆 400074

Company

School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China

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参考文献

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引用本文

张志建, 张奔牛. 基于磁感应链的钢筋混凝土应力状态检测方法研究[J]. 工程材料与结构, 2025, 4(2): 47-53.

Citation

ZHANG Zhijian, ZHANG Benniu. Research on stress state detection method of reinforced concrete based on magnetic induction chain[J]. Engineering Materials and Structures 2025, 4(2): 47-53.