WITHDRAWN: Repair, rehabilitation and retrofitting of reinforced concrete structures by using non-destructive testing methods

Ramesh, Gomasa; Srinath, Doddipati; Ramya, Dharna; Krishna, Bonagani Vamshi

doi:10.1016/j.matpr.2021.02.778

Cited by 32 publications

(4 citation statements)

References 6 publications

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“…Crack is the broken on the concrete's surface shown as lines that can be categorized with three parameters: the width, the length, and the pattern [10]. Several types of surface crack such as plastic settlement, plastic shrinkage, early thermal contraction, long-term drying shrinkage, surface crazing, corrosion of reinforcement, alkalisilica reaction, longitudinal and transverse crack.…”

Section: Materials and Methods Types Of Surface Crackmentioning

confidence: 99%

Performance analysis of various types of surface crack detection based on image processing

Lionnie

Ramadhan

Rosyadi

et al. 2022

Sinergi

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Major cracks on a highway or bridge's concrete surface have a massive risk of damages, accompanied by less maintenance, slow detection, and handling; the worst case of the damage is the structure's total collapse, which can produce fatalities. Moreover, Indonesia's climate and geographical location contribute to a higher level of potential damage to the structure. In order to reduce the potential damage, the need for a surface crack detection system arises. This research analysed three different databases (Database A, B, and C) with different surface concrete crack types, such as early thermal contraction, plastic shrinkage, corrosion reinforcement, and non-crack images. The total images from each Database vary from 14 images for Database A, 80 images for Database B, and 4000 images for Database C. The Otsu thresholding and mathematical morphology operations such as opening, closing, dilation, and erosion with pre-processing methods were combined and produced results for each Database with classification using Euclidean distance calculation. The best results for Database A and B were 100% using combination Otsu thresholding with Laplacian operator and Laplacian of Gaussian filter and the same result for a combination of mathematical morphological operations. The best result using Database C, which had more images than Database A and B, was 80,2% using a combination of mathematical morphological operations.

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Section: Materials and Methods Types Of Surface Crackmentioning

confidence: 99%

Performance analysis of various types of surface crack detection based on image processing

Lionnie

Ramadhan

Rosyadi

et al. 2022

Sinergi

View full text Add to dashboard Cite

show abstract

“…Strengthening is a promising approach to improve or regain the load-carrying capacity of structures to extend their serviceability (Shaaban & Seoud, 2018). There are many strengthening techniques, such as guniting (Ramesh et al, 2021), jacketing (Maraq et al, 2021), external prestressing (Kim et al, 2021) and fibre reinforced polymer (FRP) (Alhaddad et al, 2021). FRP gained wide acceptance as a promising technique for retrofitting structural members for its high strength to weight ratio, its damping capabilities, its high resistance to corrosion, its fatigue resistance, and the short time scale for repair (Panahi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Structural Behaviour of Polystyrene Foam Lightweight Concrete Beams Strengthened with FRP Laminates

Montaser

Shaaban

Zaher

et al. 2022

Int J Concr Struct Mater

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Lightweight concrete (LWC) is one of the most important building materials nowadays. Many research studies were focused on LWC produced using lightweight aggregates. However, limited work was cited for LWC produced using polystyrene beads. In this study, LWC beams strengthened with carbon fibre reinforced polymer (CFRP) and glass fibre reinforced polymer (GFRP) were experimentally tested to investigate the improvement in their flexural and shear behaviours. LWC in this investigation was achieved by partial replacement of normal aggregate by polystyrene beads and resulted in approximately 30% less weight compared to Normal weight concrete. Fourteen Reinforced Concrete (RC) LWC beams of 100 mm by 300 mm cross section having an overall length of 3250 mm were tested under four-point bending. These beams were designed, detailed, and tested to obtain flexural and shear mode of failure. These beams were divided into two groups based on the intended failure mode. In each group, six beams were strengthened using CFRP and GFRP laminates, while the remaining one beam was used as control. The tested parameters were the type of FRP, the width of the laminates used in shear strengthening, and the number of layers used in flexural strengthening. It was found that strengthening of LWC beams using CFRP and GFRP layers resulted in increasing the loading capacity and decreasing deflection as compared to control. The strengthening with CFRP and GFRP is also suitable in reducing the crack width and crack propagation which is more significant in LWC beams. The experimental results were also compared with the expressions in codes for forecasting the strength of LWC beams and it was that these expressions are compatible with the experimental results.

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“…Non-destructive testing (NDT) methods are often used as a diagnostic tool for structures to inform about the risk of failure and the necessity of repair and renovation [ 9 , 10 , 11 ]. Their popularity in the examination of historic structures derives from the fact that NDT methods detect defects and evaluate the conditions of the materials without a necessity to destroy the studied element [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

The Use of NDT Diagnostic Methods and Calculations in Assessing the Masonry Tower Crowned with the Steel Dome

et al. 2022

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Non-destructive testing (NDT) methods are a diagnostic tool for evaluating the risk of failure or the need for repair and renovation. In analyzing constructions of high historical value, destructive diagnostic methods should be avoided. This study is a comprehensive NDT investigation of the masonry tower topped with a steel dome, a remnant of the overhead telecommunications network from the end of the 19th century. Visual inspection and research made it possible to assess the degree of damage to the structure. Stress–strain state analysis showed the sufficient load-bearing capacity of the steel dome. In addition, calculations have shown that the masonry tower is subjected to significant horizontal forces causing structure cracks.

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WITHDRAWN: Repair, rehabilitation and retrofitting of reinforced concrete structures by using non-destructive testing methods

Cited by 32 publications

References 6 publications

Performance analysis of various types of surface crack detection based on image processing

Performance analysis of various types of surface crack detection based on image processing

Structural Behaviour of Polystyrene Foam Lightweight Concrete Beams Strengthened with FRP Laminates

The Use of NDT Diagnostic Methods and Calculations in Assessing the Masonry Tower Crowned with the Steel Dome

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