Flexural rehabilitation of steel beam with CFRP and BFRP fabrics – A comparative study

This paper compares the performance of structural steel beams retrofitted with two different fiber reinforced polymer (FRP) fabrics: Carbon FRP (CFRP) and Basalt FRP (BFRP) fabrics. A total of eight steel beams with and without corrosion defect in the flexural tension zone were tested under 4-point...

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Bibliographic Details
Published in:Archives of Civil and Mechanical Engineering 2019-05, Vol.19 (3), p.871-882
Main Authors: Bastani, Amirreza, Das, Sreekanta, Kenno, Sara Y.
Format: Article
Language:English
Subjects:
Basalt
BFRP fabric
Carbon fiber reinforced plastics
CFRP fabric
Civil Engineering
Comparative studies
Ductility
Engineering
Fabrics
Fiber reinforced polymers
Finite element method
Flexural rehabilitation
Load–deflection behavior
Mathematical models
Mechanical Engineering
Non-linear finite element analysis
Original Research Article
Retrofitting
Steel beams
Structural Materials
Structural steels
Textile composites
Ultimate loads
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Summary:This paper compares the performance of structural steel beams retrofitted with two different fiber reinforced polymer (FRP) fabrics: Carbon FRP (CFRP) and Basalt FRP (BFRP) fabrics. A total of eight steel beams with and without corrosion defect in the flexural tension zone were tested under 4-point bending load. The study found that the use of both FRP fabrics resulted in reduced ductility, however, ductility of beams retrofitted with BFRP fabric is much higher than that of the beams retrofitted with CFRP fabric of similar thickness. The study also found that both FRPs fabrics are effective in increasing the ultimate load, yield load, and elastic stiffness of beams, however, number of BFRP fabric layers required is higher than the number of CFRP fabrics. The structural behavior of steel beams including the complex behavior of rupture in the FRP fabrics were successfully modeled using a commercially finite element software and a good correlation was obtained between the finite element models and the lab specimens. Validated finite element model was used to obtain additional information that could not be obtained from the experimental study. This study concludes that the Basalt fabric offers a competitive and green alternative to the Carbon fabric.
ISSN:1644-9665
2083-3318
DOI:10.1016/j.acme.2019.04.004