Investigation of the Crack Behavior of CRC Using 4D Computed Tomography, Photogrammetry, and Fiber Optic Sensing

Giese, Josiane; Herbers, Max; Liebold, Frank; Wagner, Franz; Grzesiak, Szymon; de Sousa, Christoph; Pahn, Matthias; Maas, Hans-Gerd; Marx, Steffen; Curbach, Manfred; Beckmann, Birgit

doi:10.3390/buildings13102595

Cited by 2 publications

(11 citation statements)

References 47 publications

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“…The test setup and the experimental program is described in detail in [13]. In the following, a short overview is given:…”

Section: Test Setup and Experimental Programmentioning

confidence: 99%

“…The tests were carried out on a beam couple (Experiment 1) and a beam quartet (Experiment 2), as illustrated in Figure 2, with a rod in between the beams (gap of 10 mm) that formed the central support. Further information regarding the hydraulic cylinders and load cell configuration can be found in [13]. Due to the size of the utilized CT device, the height of the measurement field was limited to 400 mm, as displayed in Figure 1a.…”

Section: Test Setup and Experimental Programmentioning

confidence: 99%

“…Detailed information about the specimens, including geometry, reinforcement layout, production, and curing, is given in [13]. Here is some brief information:…”

Section: Specimensmentioning

confidence: 99%

“…Detailed information regarding this measurement technique as well as the assessment of the results can be found in [13].…”

Section: Specimensmentioning

confidence: 99%

“…The second paper, by Giese et al [13], presented and compared different mechanical crack width measurement techniques that can be combined with in situ CT. The results of the DIC and the adjusted DVC presented in this study were also included in the comparison, proving the validity of the DVC.…”

Section: Introductionmentioning

confidence: 99%

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Damage Analysis and Quality Control of Carbon-Reinforced Concrete Beams Based on In Situ Computed Tomography Tests

Liebold,

Wagner,

Giese

et al. 2023

Buildings

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Carbon-reinforced concrete (CRC) is increasingly utilized in construction, due to its unique properties, such as corrosion resistance, high-tensile strength, and durability. Understanding its behavior under different loads is crucial to ensuring its safe and effective use in various construction applications. In this study, three-point bending tests were performed in combination with large-scale in situ computed tomography (CT). This paper presents the related three- and four-dimensional evaluation methods, with emphasis on crack width and quality control. The focus was on large CRC beams, with cross-sectional sizes of up to 80 mm by 160 mm. Such dimensions require extremely high energy during a CT scan. Therefore, a new experimental setup with energies of up to 8 MeV was used in this study. However, such high energies posed new challenges to the analysis methods. Therefore, two methods (digital volume correlation and grayscale profile analysis) for accurate crack width estimation were adapted and applied to the 3D reconstructions. In addition, a photogrammetric stereo image sequence was acquired and analyzed, using digital image correlation to cross-validate the results derived from the 3D crack width estimates. The 3D CT images also played a key role in the quality control measures, including the localization of the carbon-reinforcement and the assessment of porosity within the concrete structure.

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“…The test setup and the experimental program is described in detail in [13]. In the following, a short overview is given:…”

Section: Test Setup and Experimental Programmentioning

confidence: 99%

Section: Test Setup and Experimental Programmentioning

confidence: 99%

“…Detailed information about the specimens, including geometry, reinforcement layout, production, and curing, is given in [13]. Here is some brief information:…”

Section: Specimensmentioning

confidence: 99%

“…Detailed information regarding this measurement technique as well as the assessment of the results can be found in [13].…”

Section: Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Damage Analysis and Quality Control of Carbon-Reinforced Concrete Beams Based on In Situ Computed Tomography Tests

Liebold,

Wagner,

Giese

et al. 2023

Buildings

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The Impact of Liquids and Saturated Salt Solutions on Polymer-Coated Fiber Optic Sensors for Distributed Strain and Temperature Measurement

Weisbrich,

Messerer,

Holzer

et al. 2024

Sensors

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The application of distributed fiber optic strain and temperature measurement can be utilized to address a multitude of measurement tasks across a diverse range of fields, particularly in the context of structural health monitoring in the domains of building construction, civil engineering, and special foundation engineering. However, a comprehensive understanding of the influences on the measurement method and the sensors is essential to prevent misinterpretations or measurement deviations. In this context, this study investigated the effects of moisture exposure, including various salt solutions and a high pH value, on a distributed strain measurement using Rayleigh backscattering. Three fiber optic sensors with different coating materials and one uncoated fiber were exposed to five different solutions for 24 h. The study revealed significant discrepancies (∼38%) in deformation between the three coating types depending on the surrounding solution. Furthermore, in contrast to the prevailing literature, which predominantly describes swelling effects, a negative deformation (∼−47 με) was observed in a magnesium chloride solution. The findings of this study indicate that corresponding effects can impact the precision of measurement, potentially leading to misinterpretations. Conversely, these effects could be used to conduct large-scale monitoring of chemical components using distributed fiber optic sensing.

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Investigation of the Crack Behavior of CRC Using 4D Computed Tomography, Photogrammetry, and Fiber Optic Sensing

Cited by 2 publications

References 47 publications

Damage Analysis and Quality Control of Carbon-Reinforced Concrete Beams Based on In Situ Computed Tomography Tests

Damage Analysis and Quality Control of Carbon-Reinforced Concrete Beams Based on In Situ Computed Tomography Tests

The Impact of Liquids and Saturated Salt Solutions on Polymer-Coated Fiber Optic Sensors for Distributed Strain and Temperature Measurement

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