Digital Image Correlation for Evaluation of Cracks in Reinforced Concrete Bridge Slabs
In proof-loading of concrete slab bridges, advanced monitoring methods are required for identification of stop criteria. In this study, Two-Dimensional Digital Image Correlation (2D DIC) is investigated as one of the governing measurement methods for crack detection and evaluation. The investigation...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Infrastructures |
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| Online Access: | https://www.mdpi.com/2412-3811/6/7/99 |
| _version_ | 1797526884834082816 |
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| author | Christian Overgaard Christensen Jacob Wittrup Schmidt Philip Skov Halding Medha Kapoor Per Goltermann |
| author_facet | Christian Overgaard Christensen Jacob Wittrup Schmidt Philip Skov Halding Medha Kapoor Per Goltermann |
| author_sort | Christian Overgaard Christensen |
| collection | DOAJ |
| description | In proof-loading of concrete slab bridges, advanced monitoring methods are required for identification of stop criteria. In this study, Two-Dimensional Digital Image Correlation (2D DIC) is investigated as one of the governing measurement methods for crack detection and evaluation. The investigations are deemed to provide valuable information about DIC capabilities under different environmental conditions and to evaluate the capabilities in relation to stop criterion verifications. Three Overturned T-beam (OT) Reinforced Concrete (RC) slabs are used for the assessment. Of these, two are in situ strips (0.55 × 3.6 × 9.0 m) cut from a full-scale OT-slab bridge with a span of 9 m and one is a downscaled slab tested under laboratory conditions (0.37 × 1.7 × 8.4 m). The 2D DIC results includes full-field plots, investigation of the time of crack detection and monitoring of crack widths. Grey-level transformation was used for the in situ tests to ensure sufficient readability and results comparable to the laboratory test. Crack initiation for the laboratory test (with speckle pattern) and in situ tests (plain concrete surface) were detected at intervals of approximately 0.1 mm to 0.3 mm and 0.2 mm to 0.3 mm, respectively. Consequently, the paper evaluates a more qualitative approach to DIC test results, where crack indications and crack detection can be used as a stop criterion. It was furthermore identified that crack initiation was reached at high load levels, implying the importance of a target load. |
| first_indexed | 2024-03-10T09:36:39Z |
| format | Article |
| id | doaj.art-cc07465aca4a434798c68fe58cd68246 |
| institution | Directory Open Access Journal |
| issn | 2412-3811 |
| language | English |
| last_indexed | 2024-03-10T09:36:39Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Infrastructures |
| spelling | doaj.art-cc07465aca4a434798c68fe58cd682462023-11-22T04:04:00ZengMDPI AGInfrastructures2412-38112021-07-01679910.3390/infrastructures6070099Digital Image Correlation for Evaluation of Cracks in Reinforced Concrete Bridge SlabsChristian Overgaard Christensen0Jacob Wittrup Schmidt1Philip Skov Halding2Medha Kapoor3Per Goltermann4Department of Civil Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, DenmarkDepartment of Built Environment, University of Aalborg, 9220 Aalborg Ø, DenmarkDepartment of Civil Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, DenmarkDepartment of Civil Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, DenmarkDepartment of Civil Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, DenmarkIn proof-loading of concrete slab bridges, advanced monitoring methods are required for identification of stop criteria. In this study, Two-Dimensional Digital Image Correlation (2D DIC) is investigated as one of the governing measurement methods for crack detection and evaluation. The investigations are deemed to provide valuable information about DIC capabilities under different environmental conditions and to evaluate the capabilities in relation to stop criterion verifications. Three Overturned T-beam (OT) Reinforced Concrete (RC) slabs are used for the assessment. Of these, two are in situ strips (0.55 × 3.6 × 9.0 m) cut from a full-scale OT-slab bridge with a span of 9 m and one is a downscaled slab tested under laboratory conditions (0.37 × 1.7 × 8.4 m). The 2D DIC results includes full-field plots, investigation of the time of crack detection and monitoring of crack widths. Grey-level transformation was used for the in situ tests to ensure sufficient readability and results comparable to the laboratory test. Crack initiation for the laboratory test (with speckle pattern) and in situ tests (plain concrete surface) were detected at intervals of approximately 0.1 mm to 0.3 mm and 0.2 mm to 0.3 mm, respectively. Consequently, the paper evaluates a more qualitative approach to DIC test results, where crack indications and crack detection can be used as a stop criterion. It was furthermore identified that crack initiation was reached at high load levels, implying the importance of a target load.https://www.mdpi.com/2412-3811/6/7/99crack evaluationdigital image correlationproof-loadingconcrete slab bridgesstop criteria |
| spellingShingle | Christian Overgaard Christensen Jacob Wittrup Schmidt Philip Skov Halding Medha Kapoor Per Goltermann Digital Image Correlation for Evaluation of Cracks in Reinforced Concrete Bridge Slabs Infrastructures crack evaluation digital image correlation proof-loading concrete slab bridges stop criteria |
| title | Digital Image Correlation for Evaluation of Cracks in Reinforced Concrete Bridge Slabs |
| title_full | Digital Image Correlation for Evaluation of Cracks in Reinforced Concrete Bridge Slabs |
| title_fullStr | Digital Image Correlation for Evaluation of Cracks in Reinforced Concrete Bridge Slabs |
| title_full_unstemmed | Digital Image Correlation for Evaluation of Cracks in Reinforced Concrete Bridge Slabs |
| title_short | Digital Image Correlation for Evaluation of Cracks in Reinforced Concrete Bridge Slabs |
| title_sort | digital image correlation for evaluation of cracks in reinforced concrete bridge slabs |
| topic | crack evaluation digital image correlation proof-loading concrete slab bridges stop criteria |
| url | https://www.mdpi.com/2412-3811/6/7/99 |
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