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基于波动分析方法的钢管混凝土脱粘缺陷检测

Detection of Debonding Defects in Concrete-Filled Steel Tubes Using Fluctuation Analysis Method.

作者信息

Wang Chenfei, Yang Yixin, Fan Guangming, Lian Junyin, Chen Fangjian

机构信息

College of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China.

College of Civil Engineering and Architecture, Xiamen University of Technology, Xiamen 361024, China.

出版信息

Sensors (Basel). 2024 Dec 23;24(24):8222. doi: 10.3390/s24248222.

DOI:10.3390/s24248222
PMID:39771954
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11680037/
Abstract

This study presents a comprehensive method for detecting debonding defects in concrete-filled steel tube (CFST) structures using wave propagation analysis with externally attached piezoelectric ceramic sensors. Experimental tests and numerical simulations were conducted to evaluate the sensitivity and accuracy of two measurement techniques-the flat and oblique measurement methods-in detecting debonding defects of varying lengths and heights. The results demonstrate that the flat measurement method excels in detecting debonding height, while the oblique method is more effective for detecting debonding length. A normalized judgment index (DI) was introduced to quantify the correlation between debonding characteristics and the detected signal amplitude, revealing the significant influence of sensor spacing on detection accuracy. Furthermore, a mathematical model based on wavelet packet energy analysis was developed to establish a linear relationship between wavelet packet energy and debonding size. This model offers a scientific foundation for the quantitative detection of debonding defects and provides a new approach to the health monitoring of CFST structures. The integrated use of both measurement techniques enhances detection precision, enabling both qualitative and quantitative defect analysis, which can significantly guide the maintenance and repair of CFST structures.

摘要

本研究提出了一种综合方法，用于使用外部粘贴的压电陶瓷传感器通过波传播分析来检测钢管混凝土（CFST）结构中的脱粘缺陷。进行了实验测试和数值模拟，以评估两种测量技术——平面测量法和斜测法——在检测不同长度和高度的脱粘缺陷时的灵敏度和准确性。结果表明，平面测量法在检测脱粘高度方面表现出色，而斜测法在检测脱粘长度方面更有效。引入了归一化判断指标（DI）来量化脱粘特征与检测信号幅度之间的相关性，揭示了传感器间距对检测精度的显著影响。此外，基于小波包能量分析建立了数学模型，以建立小波包能量与脱粘尺寸之间的线性关系。该模型为脱粘缺陷的定量检测提供了科学依据，并为CFST结构的健康监测提供了新方法。两种测量技术的综合使用提高了检测精度，能够进行定性和定量的缺陷分析，这可以显著指导CFST结构的维护和修复。

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