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Long-Term Flexural Performance of Prestressed-NSM-CFRP Strengthened RC Beams

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ucalgary_2013_yadollahi omran_hamid.pdf (21.85Mb)
Advisor
El-Hacha, Raafat
Author
Yadollahi Omran, Hamid
Accessioned
2013-11-07T18:31:08Z
Available
2014-03-15T07:00:14Z
Issued
2013-11-07
Submitted
2013
Other
CFRP
Near-surface mounted
Prestressing
Strengthening
Reinforced concrete beam
Freeze-thaw
Sustained load
Deformability and ductility
Anchorage system
Finite element analysis
Debonding model
Parametric study
Analytical simulation
Subject
Engineering--Civil
Type
Thesis
Metadata
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Abstract
The use of prestressed Fibre Reinforced Polymer (FRP) for strengthening structural members requires gaining further knowledge about the long-term behaviour of these members. In this research, the long-term flexural performance of the prestressed Near-Surface Mounted (NSM) Carbon Fibre Reinforced Polymer (CFRP) strengthened Reinforced Concrete (RC) beams subjected to accelerated environmental exposure and sustained load condition was studied. The static behaviour of the exposed and unexposed beams was predicted numerically and analytically, and the predicted results were compared with the experimental ones. The prestressing system used for tensioning the NSM CFRP reinforcements was modified. The prestress loss in the NSM CFRP reinforcements was studied. Deformability and ductility of the prestressed NSM CFRP strengthened RC beams were studied in detail. Furthermore, the effects of the different parameters on the flexural behaviour of the NSM CFRP strengthened RC beams and on the pullout capacity of the anchorage system used for prestressing were investigated numerically. The findings showed the significant effect of the applied exposure on the flexural performance of the beams, and furthermore, the high reliability of the developed numerical and analytical models for simulation of the static flexural behaviour of the exposed and unexposed beams. The results of this research lead to an understanding of the long-term flexural behave iour of the RC beams strengthened using prestressed NSM CFRP reinforcements and pursue the evolution of this strengthening system to be used in practical projects with sufficient confidence.
Corporate
University of Calgary
Faculty
Graduate Studies
Doi
http://dx.doi.org/10.11575/PRISM/26783
Uri
http://hdl.handle.net/11023/1159
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