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Buildings 2018, 8(11), 158; https://doi.org/10.3390/buildings8110158

Image Post-Processing Method for Quantification of Cracking in RC Precast Beams under Bending

School of Architecture, Department of Technology in Architecture, Polytechnic University of Catalunya, Av Diagonal 649, 08034 Barcelona, Spain
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Received: 16 August 2018 / Revised: 27 October 2018 / Accepted: 30 October 2018 / Published: 13 November 2018
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Abstract

Image processing methods are increasingly used in civil engineering, especially in the maintenance of concrete structures. Current digital cameras and post-processing methods allow verifying qualitatively the state of conservation of wide areas of concrete in dams and bridges. When dealing with building refurbishments and rehabilitation, it is important to verify that existing structural elements fit the requirements of the standards; in the case of structures formed by traditional RC joists, cracking of the bottom-face provides information about the serviceability of these elements. This research proposed and put in practice through experimental tests an image post-processing method for quantification of cracking (five specimens were used and calibrated). Based on a sequence of shots and through a complex step-by-step post-processing, cracks were identified and measured to calibrate this method for real purposes. The method quantifies the crack opening width and spacing by analyzing the bottom-face of the joists through the shots. Measured values of crack spacing are very similar to those predicted by the standards, while the values of crack opening width differ more from theoretical ones due to the scattering of results. However, the proposed method has been proved as suitable and useful for fast inspections of RC elements under bending. View Full-Text
Keywords: image-based analysis; crack detection; serviceability; durability image-based analysis; crack detection; serviceability; durability
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Albareda-Valls, A.; Bustos Herrera, A.; Zamora Mestre, J.L.; Zaribaf, S.S. Image Post-Processing Method for Quantification of Cracking in RC Precast Beams under Bending. Buildings 2018, 8, 158.

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