Research on concrete diagonal crack depth detection using the tracer electromagnetic method

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2025-05-20 DOI:10.1016/j.istruc.2025.109187

Yulei Wang , Jiahui Liang , Lei Tang

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引用次数: 0

Abstract

Crack propagation can lead to fracture of concrete structures, and the crucial depth data is not visible and is difficult to measure effectively. The traditional concrete crack depth detection method is mainly aimed at vertical cracks, and there are challenges include inadequate accuracy, low efficiency, and insufficient detection depth. And there is almost no research on the depth detection of diagonal cracks. To address this issue, this paper introduces the tracer electromagnetic method, a novel approach to measure the depth of concrete diagonal cracks by combining the indicator with ground penetrating radar. The indicator is used in this method to reach the bottom of the crack, and its position is monitored through electromagnetic wave reflections, enabling an intuitive display of the crack depth. In this paper, the detection principle of this new method is described in detail, and the concrete standard diagonal crack specimens with different inclination angles are made. Based on the developed indicator, the experimental study on the detection of diagonal crack depth is carried out. The crack depth is remeasured by the most conventional ultrasonic method, and the detection effects of the two detection techniques are compared comprehensively. Numerical examples are used to analyze the factors that influence the accuracy of the tracer electromagnetic method in measuring the depth of diagonal cracks. The results demonstrate that, compared to the ultrasonic method, the tracer electromagnetic method significantly enhances the accuracy of diagonal crack depth detection and can also identify the expansion direction of the crack within the structure. Moreover, the indicator placed on the lower side wall of the diagonal crack reduces the radar signal reflection at the crack’s bottom. In the actual detection, the structural boundary and the radar detection distance will lead to different detection results in different detection directions.

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示踪电磁法探测混凝土斜裂缝深度的研究

裂缝的扩展会导致混凝土结构的断裂，而关键的深度数据是不可见的，难以有效测量。传统的混凝土裂缝深度检测方法主要针对垂直裂缝，存在精度不高、效率低、检测深度不足等问题。而对角裂缝深度检测的研究几乎没有。针对这一问题，本文介绍了示踪电磁法，一种将示踪电磁法与探地雷达相结合测量混凝土斜裂缝深度的新方法。该方法利用指示器到达裂缝底部，通过电磁波反射监测其位置，直观显示裂缝深度。本文详细介绍了该方法的检测原理，并制作了不同倾角的混凝土标准斜裂缝试件。基于所开发的指标，进行了对角裂纹深度检测的实验研究。采用最常规的超声方法对裂纹深度进行了重测，并对两种检测方法的检测效果进行了综合比较。通过数值算例分析了影响示踪电磁法测量斜裂缝深度精度的因素。结果表明，与超声法相比，示踪电磁法显著提高了对角裂纹深度检测的精度，并能识别出结构内部裂纹的扩展方向。此外，在斜裂缝的下侧壁放置指示剂可以减少裂缝底部雷达信号的反射。在实际探测中，结构边界和雷达探测距离会导致不同探测方向的探测结果不同。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.