基于共面电容传感技术检测混凝土板中钢筋的实验研究与有限元模拟

Experimental Study and FEM Simulations for Detection of Rebars in Concrete Slabs by Coplanar Capacitive Sensing Technique.

作者信息

Abdollahi-Mamoudan Farima, Ibarra-Castanedo Clemente, Filleter Tobin, Maldague Xavier P V

机构信息

Department of Electrical and Computer Engineering, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada.

Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College, Toronto, ON M5S 3G8, Canada.

出版信息

Sensors (Basel). 2022 Jul 20;22(14):5400. doi: 10.3390/s22145400.

DOI:10.3390/s22145400

PMID:35891079

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9323606/

Abstract

In the present study, a relatively novel non-destructive testing (NDT) method called the coplanar capacitive sensing technique was applied in order to detect different sizes of rebars in a reinforced concrete (RC) structure. This technique effectively detects changes in the dielectric properties during scanning in various sections of concrete with and without rebars. Numerical simulations were carried out by three-dimensional (3D) finite element modelling (FEM) in COMSOL Multiphysics software to analyse the impact of the presence of rebars on the electric field generated by the coplanar capacitive probe. In addition, the effect of the presence of a surface defect on the rebar embedded in the concrete slab was demonstrated by the same software for the first time. Experiments were performed on a concrete slab containing rebars, and were compared with FEM results. The results showed that there is a good qualitative agreement between the numerical simulations and experimental results.

摘要

在本研究中，一种相对新颖的无损检测（NDT）方法——共面电容传感技术被应用于检测钢筋混凝土（RC）结构中不同尺寸的钢筋。该技术能够有效地检测在扫描有钢筋和无钢筋的混凝土各截面时介电性能的变化。通过COMSOL Multiphysics软件中的三维（3D）有限元建模（FEM）进行了数值模拟，以分析钢筋的存在对共面电容探头产生的电场的影响。此外，该软件首次展示了混凝土板中嵌入钢筋表面缺陷的存在所产生的影响。在一块含有钢筋的混凝土板上进行了实验，并与有限元建模结果进行了比较。结果表明，数值模拟与实验结果在定性上有良好的一致性。