通过模态曲率分析检测UHPFRC光束中的多重损伤
Fahime Sokhangou1, Luca Sorelli1, Luc Chouinard2
1Water and Civil Engineering Department, Laval University, Quebec City, QC G1V 0A6, Canada.
Sensors (Basel, Switzerland)
|February 10, 2024
概括
本研究引入了增强的模态曲率分析与波波变换曲率 (WTC) 结合,以有效地检测超高性能纤维增强混凝土 (UHPFRC) 梁的分布式损伤,优于传统方法.
科学领域:
- 结构健康监测 结构健康监测
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
背景情况:
- 对于混凝土结构,建立了基于曲率的损坏检测.
- 关于在多个区域中识别分布式损害的研究有限.
- 超高性能纤维增强混凝土 (UHPFRC) 是一种具有特殊性能的新型材料.
研究的目的:
- 应用增强的模态曲率分析与波波变换曲率 (WTC) 结合,用于在UHPFRC光束中检测损坏.
- 在UHPFRC结构元素中识别和突出显示分布式损坏区域.
- 与传统的损害指数 (DI) 方法相比,评估增强方法的有效性.
主要方法:
- 在UHPFRC梁中进行造和受控损伤诱导 (切割).
- 使用加速度计进行实验模式分析和运营模式分析.
- 有限元模型 (FEM) 模拟用于比较分析.
- 使用立方线插值计算模态曲率.
- 应用损害指数 (DI) 和WTC方法来识别损害.
主要成果:
- 增强的模态曲率WTC方法成功识别了UHPFRC梁中的受损区域.
- 与DI方法相比,WTC方法在突出损坏方面表现优越.
- 实验和FEM数据都证实了开发的方法的有效性.
结论:
- 合模态曲率WTC方法对于识别UHPFRC光束中的分布式损伤是有效的.
- 这种增强技术为UHPFRC结构的结构健康监测提供了更高的准确性.
- 该研究验证了先进的信号处理技术对先进的建筑材料的潜力.
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