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Long-term performance monitoring of GFRP-reinforced concrete beams using sensor-mounted supplemental rebars under harsh environmental conditions

  • Arash RahmatianEmail author
  • Timir Baran Roy
  • Amir Mofidi
  • Ashutosh Bagchi
  • Michelle Nokken
Original Paper
  • 34 Downloads

Abstract

Fiber-optic sensors (FOS) are increasingly being used in reinforced-concrete (RC) structures for their accuracy and durability. One of the drawbacks of FOS is their fragility at installation. One recently developed method to address such deficiency is to install the FOS on a short bar (supplemental bar) that is rigidly connected to the structural reinforcement bars prior to concrete pouring. However, the durability of such systems under harsh environmental conditions has not been well established. In order to better understand the behavior of the aforementioned FOS systems under harsh environmental conditions, seven half-scale RC beams with glass fiber-reinforced polymer bars were exposed to four different exposure regimes, in the present study. After 14 months of exposure to harsh environmental conditions, the RC beams were subjected to static flexural testing to evaluate the FOS system behavior under each environmental condition. In addition, the strain responses of the sensors mounted on the supplemental bars and those in the main bars were monitored to validate the newly developed FOS mounting system. The results of this study show that the proposed FOS mounting system can efficiently capture the actual strain in all environmental conditions tested in this study except immersion exposure under high alkali solution. In addition, the flexural deformation and the exposure impact to the beam capacity were evaluated.

Keywords

FRP Concrete beam Weathering SHM Sensor Monitoring 

Notes

Acknowledgements

The support of the Natural Sciences and Engineering Research Council (NSERC) of Canada is gratefully acknowledged. The authors also thank Pultrall Inc. for donating the FRP materials for this study.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Arash Rahmatian
    • 1
    Email author
  • Timir Baran Roy
    • 2
  • Amir Mofidi
    • 3
  • Ashutosh Bagchi
    • 2
  • Michelle Nokken
    • 2
  1. 1.Department of Computer Science and Engineering TechnologyUniversity of Houston-DowntownHoustonUSA
  2. 2.Department of Building, Civil and Environmental EngineeringConcordia UniversityMontréalCanada
  3. 3.Geotechnics and Structures Group, School of EngineeringNewcastle UniversityNewcastle upon TyneUK

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