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| 基于超声平面波成像的混凝土内部裂缝定量检测方法研究 |
| A study on quantitative detection of internal cracks in concrete based on ultrasonic plane wave imaging |
| 投稿时间：2025-03-17 修订日期：2025-05-29 |
| DOI： |
| 中文关键词: 混凝土内部裂缝 细观结构 角度修正 平面波成像 图像识别 |
| 英文关键词: internal cracks in concrete meso-structure angle correction plane wave imaging image recognition |
| 基金项目:中国水科院基本科研业务费项目(SM0145B042021) |
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| 中文摘要: |
| 针对传统复合平面波成像方法检测混凝土内部裂缝存在较强伪像，裂缝角度检测精度差的问题，本文提出了一种角度修正复合平面波成像方法，并采用图像识别技术实现了内部裂缝角度及长度的准确检测。首先开展了混凝土细观模型内部裂缝超声检测的有限元模拟，然后对比研究了传统复合平面波成像方法和角度修正复合平面波成像方法的检测机理和识别效果，给出了混凝土内部裂缝角度及长度定量检测的识别标准，并证明了所提方法的正确性，最后分析了骨料粒径、混凝土波速和裂缝深度对角度修正复合平面波成像方法的影响。研究结果表明，角度修正复合平面波成像方法的检测效果较好；骨料粒径增大虽然会影响该方法的识别精度，但影响较小；当裂缝深度大于10 cm时，该方法仍具备较好的识别效果。本研究可为实际工程中混凝土内部裂缝的定量检测提供理论基础。 |
| 英文摘要: |
| This paper proposes an angle-corrected compound plane wave imaging method to address the issues of strong artifacts and poor accuracy in crack angle detection associated with traditional compound plane wave imaging methods when detecting internal cracks in concrete. First, finite element simulations of ultrasonic detection of internal cracks in concrete microstructure models were conducted. Subsequently, the detection mechanisms and identification effects of the traditional compound plane wave imaging method and the proposed angle-corrected method were compared and analyzed. Quantitative identification criteria for internal crack angles and lengths were provided, and the validity of the proposed method was demonstrated. Finally, the effects of aggregate size, concrete wave velocity, and crack depth on the angle-corrected compound plane wave imaging method were analyzed. The results indicate that the proposed method offers better detection performance. Although an increase in aggregate size can affect the identification accuracy of the method, the impact is minimal. The method maintains good identification performance even when the crack depth exceeds 10 cm. This study provides a theoretical basis for the quantitative detection of internal cracks in concrete in practical engineering applications. |
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