Nondestructive Assessment of a Jetty Bridge Structure Using Impact-Echo and Shear-Wave Techniques

Dawood, Nabil; Marzouk, H.; Hussein, Amgad; Gillis, N. S.

doi:10.1061/(asce)be.1943-5592.0000415

Cited by 9 publications

(11 citation statements)

References 11 publications

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“…Figure 10 shows the results of the B scan extracted using PL-Link, a program provided by Proceq, after performing the test in the same manner for slabs A to E using the Pundit 250 array. The Pundit 250 array is effective in detecting voids, reinforcing bars, and defects in concrete using S waves at 50 kHz [ 9 , 10 ] (p. 2). In this study, its applicability to PSC structures was considered.…”

Section: Resultsmentioning

confidence: 99%

A Study on the Detection of Internal Defect Types for Duct Depth of Prestressed Concrete Structures Using Electromagnetic and Elastic Waves

et al. 2021

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Prestressed concrete (PSC) is widely used for the construction of bridges. The collapse of several bridges with PSC has been reported, and insufficient grout and tendon corrosion were found inside the ducts of these bridges. Therefore, non-destructive testing (NDT) technology is important for identifying defects inside ducts in PSC structures. Electromagnetic (EM) waves have limited detection of internal defects in ducts due to strong reflections from the surface of the steel ducts. Spectral analysis of the existing impact echo (IE) method is limited to specific conditions. Moreover, the flexural mode in upper defects of ducts located at a shallow depth and delamination defects inside ducts are not considered. In this study, the applicability of the elastic wave of IE was analyzed, and multichannel analysis of surface, EM, and shear waves was employed to evaluate six types of PSC structures. A procedure using EM waves, IE, and principal component analysis (PCA) was proposed for a more accurate classification of defect types inside ducts. The proposed procedure was effective in classifying upper, internal, and delamination defects of ducts under 100 mm in thickness, and it could be utilized up to 200 mm in the case of duct defect limitations.

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Section: Resultsmentioning

confidence: 99%

A Study on the Detection of Internal Defect Types for Duct Depth of Prestressed Concrete Structures Using Electromagnetic and Elastic Waves

et al. 2021

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“…Only one side of the surface is needed to generate a set of readings as opposed to conventional Ultrasonic Pulse Velocity (UPV), which requires to two sides of a structure. The MIRA 3D shear wave topographer has been applied successfully to detect various defects in Newfoundland bridge under Dr. Marzouk' s supervision (Dawood et al, 2012). The anomalies detected are shown as different colors based on their density characteristics.…”

Section: Shear Wave Tomographymentioning

confidence: 99%

The use of random decrement technique for long term health monitoring of concrete structures

Morsy¹

2021

Preprint

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This investigation deals with the development of an advanced strategy for Structural Health Monitoring (SHM) of concrete beams and girders for important structures such as bridges, offshore platforms and nuclear power stations using smart monitoring systems, including an effective diagnostic approach for damage detection with a reliability-based performance ranking. The proposed strategy can be classified into four main sections: identification of the existence of damage, determination the localization of the damage, estimation the level of damage, and assessing the seriousness of the damage regarding the structure’s service life. Random Decrement (RD) is an accurate dynamic analysis diagnostic tool that has been used effectively for SHM; the technique has been used within various fields in mechanical, aerospace, and, recently, civil engineering. The damage detection approach is based on the RD technique. A theoretical, numerical, and experimental investigation has been conducted on concrete beams using the RD technique for damage detection in terms of changes in the dynamic properties and used at successive multiple points under certain leading point conditions to determine the location of damage through the development of the Multi-Channel Random Decrement (MCRD).

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“…However, research regarding the depth of surface-opening crack is limited. Only few scholars have conducted experiments on concrete beams and slabs to apply this method for determining the depth of surface-opening crack [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Depth estimation of surface-opening crack in concrete beams using impact-echo and non-contact video-based methods

Sun

Huang

et al. 2018

J Image Video Proc.

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Surface-opening crack is one of the main defects in concrete bridges, which results in degradation in the loadcarrying capacity of these structures. Thus, estimating the depth of such surface-opening crack is vital. This study presents impact-echo (IE) and non-contact video-based methods to estimate the surface-opening crack of concrete beams in the laboratory, and the results are compared with visual inspection. Results show that the IE method estimates a considerably larger crack depth than the non-contact video-based method and visual inspection. Although the difference between the depth measured by non-contact video-based method and visual inspection is small, the depth estimated by non-contact video-based method is slightly larger than that measured by visual inspection because it can identify the unrecognizable micro-crack by visual inspection. Moreover, when adopting the IE method, the depth of inclined crack is more overestimated than the vertical crack.

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Nondestructive Assessment of a Jetty Bridge Structure Using Impact-Echo and Shear-Wave Techniques

Cited by 9 publications

References 11 publications

A Study on the Detection of Internal Defect Types for Duct Depth of Prestressed Concrete Structures Using Electromagnetic and Elastic Waves

A Study on the Detection of Internal Defect Types for Duct Depth of Prestressed Concrete Structures Using Electromagnetic and Elastic Waves

The use of random decrement technique for long term health monitoring of concrete structures

Depth estimation of surface-opening crack in concrete beams using impact-echo and non-contact video-based methods

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