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IJSTR >> Volume 10 - Issue 11, November 2021 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Behaviour of Rectangular Hollow Steel Beams Strengthened with CFRP Sheets Applied in Longitudinal and Transversal Directions

[Full Text]

 

AUTHOR(S)

Hanan Hussien Eltobgy, Anwar Badawy Abu-Sena, Omer Nazmi Abdelnabi

 

KEYWORDS

Rectangular Hollow Steel Section, CFRP, Strengthening, Stiffness, Strength, Pucks’ failure criteria

 

ABSTRACT

Carbon Fibers Reinforced Polymers (CFRP) are widely utilized to strengthening various structural elements in order to sustain higher loads or to restore the strength of the deteriorated elements. This paper aims to investigate the behavior of hollow steel beams reinforced by unidirectional carbon fibers composite laminates applied in longitudinal and transversal directions. Experimental and numerical investigations were conducted in this study. Six specimens of rectangular hollow sectional (RHS) were subjected to a four-point loading test and divided into two groups. Each group of three specimens was tested in different positions “Mx and My”. Each group included one reference beam and two, specimens strengthened with CFRP laminates in longitudinal and transversal directions. Ultimate loads and deflection were determined through the tests. Numerical analysis was performed using a finite element program in order to determine the failure load of beams. Results of finite element model were verified with their experimental counterparts, it is found in a good agreement. As per experimental results, using the CFRP strengthening system effectively improved the strength and the ductility of strengthened beams. Also, strengthened beams with longitudinal laminates achieved a higher improvement compared to strengthened beams with transversal laminates.

 

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