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Experiment Study on Shrink Strain Monitoring of Concrete in the Cure Period With FBG Sensors

[+] Author Affiliations
Li Sun, Hong-Nan Li, Liang Ren

Dalian University of Technology, Dalian, China

Paper No. PVP2005-71591, pp. 375-380; 6 pages
doi:10.1115/PVP2005-71591
From:
  • ASME 2005 Pressure Vessels and Piping Conference
  • Volume 7: Operations, Applications, and Components
  • Denver, Colorado, USA, July 17–21, 2005
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4192-8 | eISBN: 0-7918-3763-7
  • Copyright © 2005 by ASME

abstract

Concrete is the material widely used in civil engineering. Cracks of concrete are mainly caused by the ununiform shrink in the cure period. The basic principle and merits of FBG are introduced. In order to monitor the shrink strain and temperature of concrete during the cure period, this paper presents a novelty strain sensor and temperature sensor based on FBG technology. The theoretical and experimental analyses of FBG sensor were implemented. The thermal drift experiment of sensor has also been carried out. Shrink strain and temperature of concrete have been successfully tested. The experiment results indicated that this monitor method is an ideal method in monitoring the concrete at the very early age. However, the thermal drift of FBG strain sensor should be considered during the strain measurement. This method could be used in monitoring the shrink strain and temperature of any volume concrete.

Copyright © 2005 by ASME

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