基于SMFL技术的钢筋混凝土中铁杆的腐蚀检测研究
Hongsong Tian1, Yujiang Kong1, Bin Liu1
1Guizhou Bridge Construction Group Co., Ltd., Guiyang 550001, China.
Materials (Basel, Switzerland)
|July 27, 2024
概括
自磁流泄漏 (SMFL) 技术有效检测混凝土结构中的铁杆腐蚀. 腐蚀变化显著影响SMFL信号,允许准确评估损坏.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 非破坏性测试 不破坏性测试
背景情况:
- 钢筋腐蚀是钢筋混凝土结构故障的主要原因.
- 准确检测和评估铁杆腐蚀对于结构安全至关重要.
- 自磁流泄漏 (SMFL) 技术为铁杆腐蚀检测提供了优势.
研究的目的:
- 理论上使用磁双极模型来描述铁杆腐蚀损伤的特征.
- 分析腐蚀膨胀力对SMFL检测的影响.
- 开发一个准确的模型来评估杆腐蚀程度.
主要方法:
- 提出了一种结合多个缺陷形状的磁双极理论模型.
- 分析了腐蚀膨胀力对磁场强度的影响.
- 在腐蚀的钢筋混凝土样本上使用SMFL技术进行实验验证.
- 开发了一个多参数腐蚀评估模型.
主要成果:
- 由于腐蚀而导致的磁场强度变化高达833%,而由于膨胀力的变化低于10%.
- SMFL曲线显示了随着腐蚀程度的增加而发生的单调变化,与严重腐蚀位置相关.
- 在拟议的磁性参数和铁杆腐蚀程度之间观察到一个积极的关系.
- 开发的评估模型实现了高预测准确度,平均绝对误差为8.33%.
结论:
- 腐蚀引起的SMFL场变化主导检测信号;膨胀力的影响是可以忽略不计的.
- 通过SMFL技术,可以有效地监测铁杆腐蚀的进展和在混凝土结构中的位置.
- 开发的多参数模型准确地预测了钢筋腐蚀程度,确保了结构完整性.
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