基于电阻抗谱的混凝土结构成像缺陷无损检测
Electrical impedance spectroscopy-based nondestructive testing for imaging defects in concrete structures
摘要：
提出了一种基于电阻抗谱的混凝土结构裂缝和钢筋无损检测方法。该方法利用薄绝缘裂缝的频率依赖性行为：低频电流被绝缘裂缝阻挡，而高频电流可以通过导电条而不会被薄裂缝阻挡。通过严格的数学分析，将裂纹和杆的几何结构与频率相关的Neumann-to-Dirichlet数据联系起来。各种数值模拟支持所提出的方法的可行性。
英文摘要：
An electrical impedance spectroscopy-based nondestructive testing (NDT) method is proposed to image both cracks and reinforcing bars in concrete structures. The method utilizes the frequency-dependent behavior of thin insulating cracks: low-frequency electrical currents are blocked by insulating cracks, whereas high-frequency currents can pass through the conducting bars without being blocked by thin cracks. Rigorous mathematical analysis relates the geometric structures of the cracks and bars to the frequency-dependent Neumann-to-Dirichlet data. Various numerical simulations support the feasibility of the proposed method.
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