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Identification of concrete voids in an untypical railway bridge pillar by Ground Penetrating Radar Method

Treść / Zawartość
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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The article presents the results of non-destructive testing, which was carried out on the concrete pillar with an unusual, trapezoidal shape and densely spaced reinforcement. After stripping the formwork, some surface voids became visible, which suggested that the existence of subsurface voids was also probable. The Ground Penetrating Radar method (GPR) was used to state whether these voids are formed and possibly to determine their approximate location. This paper discusses the adopted methodology of measurements, analysis and the GPR data processing. The interpretation of the echograms was based on a comparison of recorded GPR data with the modelling results MRS (FD) of electromagnetic wave propagation with the known geometry of the tested pillar. The results of detection are shown mainly in the form of the echograms (B-SCAN) and are collected as a cumulative sketch (C-SCAN). In order to assess the impact of the identified voids on the bearing capacity of the structure, the shell model of the pillar was built with the use of FEM. It shows stress distribution differences in the pillar with a continuous internal structure and in the pillar with the modelled voids. The obtained results were used for checking the bearing capacity of damaged pillar and during the preparation of the effective repair program.
Słowa kluczowe
Wydawca
Rocznik
Strony
76--80
Opis fizyczny
Bibliogr. 16 poz., fot., rys.
Twórcy
autor
  • Silesian University of Technology, Department of Mechanics and Bridges, ul. Akademicka 2A, 44-100 Gliwice
autor
  • AGH University of Science and Technology, Department of Engineering Surveying and Civil Engineering, Al. Mickiewicza 30, 30-059 Kraków
autor
  • Silesian University of Technology, Department of Mechanics and Bridges, ul. Akademicka 2A, 44-100 Gliwice
Bibliografia
  • [1] Cruz P., Topczewski Ł., Fernandes F., Trelab C., Lourenco P.: Application of radar techniques to the verification of design plans and the detection of defects in concrete bridges. Structures and Infrastructure Engineering, vol. 6, issue 4, pp. 395-407, 2010.
  • [2] Daniels: Ground Penetrating Radar. Institution of Electrical Engineers, 2004.
  • [3] De´robert X., Aubagnac C., Abraham O.: Comparison of NDT techniques on a post-tensioned beam before its autopsy. NDT&E International, vol. 35, p. 541-548, 2002.
  • [4] Kohl C., Streicher D.: Results of reconstructed and fused NDT-data measured in the laboratory and on-site at bridges. Cement & Concrete Composites, vol. 28, p. 402-413, 2006.
  • [5] Kuras P., Owerko T., Ortyl Ł., Kocierz R., Sukta O., Pradelok S.: Advantages of radar interferometry for assessment of dynamic deformation of bridge. Proceedings of the 6th International Conference Bridge maintenance, safety, management, resilience and sustainability, Stresa, Italy, pp. 885-891, Taylor & Francis Group, London, ISBN 978-0-415-62, 2012.
  • [6] Muldoon R., Chalker A., Forde M. C., Ohtsu M., Kunisue F.: Identifying voids in plastic ducts in post-tensioning prestressed concrete members by resonant frequency of impact-echo. SIBIE and tomography, Construction and Building Materials, vol. 21, pp. 527-353, 2007.
  • [7] Owerko P., Ortyl L., GPR identification of prestressing tendons in areas with high density of ordinary reinforcement. Proceedings of 13th International Multidisciplinary Scientific GeoConferences, Albena, Bulgaria, vol. 2, pp. 771-778, 2013.
  • [8] Owerko T., Ortyl L., Kocierz R., Kuras , Salamak M.: Investigation of displacements of road bridges under test loads using radar interferometry – case study. Proceedings of the 6th International Conference Bridge maintenance, safety, management, resilience and sustainability, Stresa, Italy, pp. 181-188, Taylor & Francis Group, London, ISBN 978-0-415-62, 2012.
  • [9] Pradelok S.: Dynamic tests of certain lattice girder railway bridge type nodes. Proceedings of EVACES'09. International Conference on Experimental Vibration Analysis for Civil Engineering Structures, Wroclaw, Poland, pp. 221-222, 2009.
  • [10] Pradelok S.: The influence of higher modes vibrations on local cracks in node of lattice girders bridges. Archives of Civil Engineering 58, pp. 209-221, 2012.
  • [11] Salamak M.: Bridge solids kinematics in linear structures located on mining areas. 13th International Multidisciplinary Scientific GeoConference SGEM 2013, Vol. 1, pp. 265-272, 16-22 June, Alben, Bulgaria, 2013.
  • [12] Stolt R.: Migration by Fourier transform. Geophysics, vol. 43, pp. 23-48, 1978.
  • [13] Xie X., Qin H., Liu L.: An automatic recognition algorithm for GPR images of RC structure voids. Journal of Applied Geophysics, vol. 99, pp. 125-134, 2013.
  • [14] Yehia S., Qaddoumi N., Farrag S.: Investigation of concrete mix variations and environmental conditions on defect detection ability using GPR. NDT&E International, vol. 65, pp. 35-46, 2014.
  • [15] Zhou X., Luan J., Zhang D.: Inspection of Grouting Quality for Grouted Tendon Ducts Using Ground Penetrating Radar Technique. Advanced Materials Research, vol. 639-640, pp. 1051-1055, 2013.
  • [16] EN 1992-1-1: Eurocode 2: Design of concrete structures.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-1e72e9bb-6ef6-4b69-aa17-fa6d427f8d88
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