Electromagnetic pulse-induced acoustic testing enables reliable evaluation of debonding between rebar and concret

Zhou, Xinwu; Takeda, Sho; Uchimoto, Tetsuya; Hashimoto, Mitsuo; Takagi, Toshiyuki

doi:10.1016/j.cemconcomp.2023.105170

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…However, only electromagnetic and mechanical-wave systems can assess reinforcement grids directly (and effectively). Mechanical-wave techniques can be utilized to test many different properties of RC [13,[22][23][24][25]. These techniques are well suited for testing concrete.…”

Section: Area Testing Of Rc Structures With Ndt Methodsmentioning

confidence: 99%

Multisensory Spatial Analysis and NDT Active Magnetic Method for Quick Area Testing of Reinforced Concrete Structures

Frankowski,

Chady

2023

Materials

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This paper aims to present multisensory spatial analysis (MSA). The method was designed for the quick, simultaneous identification of concrete cover thickness h, rebar diameter, and alloys of reinforcement in large areas of reinforced concrete (RC) structures, which is a complex and unsolved issue. The main idea is to divide one complex problem into three simple-to-solve and based on separate premises tasks. In the transducers designed with the MSA, sensors are arranged spatially. This arrangement identifies each RC parameter separately based on the different waveforms/attributes. The method consists of three steps. All steps are described in the paper and supported by simulations and statistical analysis of the measurement. The tests were carried out using an Anisotropic Magneto-resistance (AMR) sensor. The AMR sensors can measure strong DC magnetic fields and can be combined in spatial transducers because of their small size. The selection of the sensor was extensively justified in the introduction section. The spatial transducer and the identification’s simplicity can allow for high accuracy in the real-time area testing of all three parameters. The risk of misclassification of discrete parameters was strongly reduced, and the h parameter can be identified with millimeter accuracy.

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Section: Area Testing Of Rc Structures With Ndt Methodsmentioning

confidence: 99%

Multisensory Spatial Analysis and NDT Active Magnetic Method for Quick Area Testing of Reinforced Concrete Structures

Frankowski,

Chady

2023

Materials

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“…In these cases, the identification is mainly based on modal analysis (vibration testing of an object whereby the natural frequencies and damping ratios are determined). Good examples of mechanical methods with electromagnetic excitation are M5 [ 3 , 14 , 15 , 16 ] and EPAT [ 17 ]. Passive methods in the sonic-frequency range are usually used to study sounds generated during the regular operation of the device.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Reinforced Concrete Structures with Magnetic Method and ACO (Amplitude-Correlation-Offset) Decomposition

Frankowski

Chady

2023

Materials

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The magnetic method is one of the very few nondestructive testing (NDT) techniques that provide the possibility to conduct area tests of reinforced concrete (RC) structures in a fast, cheap, and straightforward way. This paper aims to present a new approach to the simultaneous identification of rebars’ diameter, alloy class, and thickness of the concrete cover tested with this method. Since rebars from different manufacturers may have different electromagnetic properties (standardization only for mechanical properties), preparing an effective and universal database is impossible. In this work, ACO decomposition is proposed, a new attributes extraction method designed to identify object parameters, even if it is impossible to collect a suitable training database (by pattern recognition and analysis of the deviation). Conducted tests prove that the ACO method enables accurate reflection of the waveform shape and limitation of attributes number to three or fewer (avoiding the curse of dimensionality). These properties, combined with the ability to analyze spatial components of magnetic induction (which only magnetic sensors provide), make the complex task of identification of three parameters more straightforward and the separation between the results received for different classes larger. This article presents the measurement results and the whole identification process.

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A machine vision approach with temporal fusion strategy for concrete vibration quality monitoring

Li,

Wang,

Pan

et al. 2024

Applied Soft Computing

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Electromagnetic pulse-induced acoustic testing enables reliable evaluation of debonding between rebar and concret

Cited by 4 publications

References 21 publications

Multisensory Spatial Analysis and NDT Active Magnetic Method for Quick Area Testing of Reinforced Concrete Structures

Multisensory Spatial Analysis and NDT Active Magnetic Method for Quick Area Testing of Reinforced Concrete Structures

Evaluation of Reinforced Concrete Structures with Magnetic Method and ACO (Amplitude-Correlation-Offset) Decomposition

A machine vision approach with temporal fusion strategy for concrete vibration quality monitoring

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