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首页> 外文期刊>Journal of Infrastructure Systems >Sensitivity of Two Stress Wave-Based Methods for Nondestructive Evaluation of Concrete Slabs
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Sensitivity of Two Stress Wave-Based Methods for Nondestructive Evaluation of Concrete Slabs

机译：两种基于应力波的混凝土板无损评估方法的敏感性

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摘要

Among several nondestructive testing methods, impact echo (IE) and ultrasonic surface waves (USW) have shown promising results for performance monitoring and condition assessment of concrete structures. To ensure their proper use, it is critical to quantify the potentials and limitations of those methods and to specify the degree of sensitivity of each method to different structural and defect parameters. In this study, the sensitivity of the IE and USW methods are investigated through high spatial resolution and extensive numerical simulations of intact and defective slabs. The results of the experimental and numerical studies show that the effectiveness and reliability of these two methods are limited by their sensitivity to several parameters, including boundary conditions, the geometry and material properties of a concrete structure, and the size and location of discontinuities in structures. Given the sensitivity of each method to several parameters, the combination of the IE and USW tests is recommended for more reliable quality control of newly constructed concrete structures and condition assessment of existing ones. (c) 2017 American Society of Civil Engineers.
机译：在几种无损检测方法中，冲击回波（IE）和超声表面波（USW）在混凝土结构的性能监测和状态评估中显示出令人鼓舞的结果。为了确保正确使用它们，量化这些方法的潜力和局限性以及指定每种方法对不同结构和缺陷参数的敏感度至关重要。在这项研究中，通过高空间分辨率以及完整和有缺陷的平板的广泛数值模拟，研究了IE和USW方法的灵敏度。实验和数值研究的结果表明，这两种方法的有效性和可靠性受到它们对几个参数的敏感性的限制，这些参数包括边界条件，混凝土结构的几何形状和材料特性以及结构中不连续点的大小和位置。考虑到每种方法对几个参数的敏感性，建议结合使用IE和USW测试以更可靠地控制新建混凝土结构并评估现有结构的状态。 （c）2017年美国土木工程师学会。

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