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Steel and Composite Structures
  Volume 47, Number 2, April25 2023 , pages 217-238
DOI: https://doi.org/10.12989/scs.2023.47.2.217
 


Numerical and analytical investigation of parameters influencing the behavior of shear beams strengthened by CFRP wrapping
Ceyhun Aksoylu, Yasin Onuralp Ozkilic, Şakir Yazman, Mohammed Alsdudi, Lokman Gemi and Musa Hakan Arslan

 
Abstract
    In this study, a parametric study was performed considering material properties of concrete, material properties of steel, the number of longitudinal reinforcement (reinforcement ratio), CFRP ply orientations, a number of layers as variables by using ABAQUS. Firstly, the parameters used in the Hashin failure criteria were verified using four coupon tests of CFRP. Secondly, the numerical models of the beams strengthened by CFRP were verified using five experimental data. Finally, eighty numerical models and eighty analytic calculations were developed to investigate the effects of the aforementioned variables. The results revealed that in the case of using fibrous polymer to prevent shear failure, the variables related to reinforced concrete significantly affected the behavior of specimens, whereas the variables related to CFRP composite have a slight effect on the behavior of the specimens. As a result of numerical analysis, while the increase in the longitudinal tensile and compression reinforcement, load bearing capacity increases between 23.6%-70.7% and 5.6%-12.2%, respectively. Increase in compressive strength (29 MPa to 35 MPa) leads to a slight increase in the load-carrying capacity of the specimens between 4.6% and 7.2%. However, the decrease in the compressive strength (29 MPa to 20 MPa) significantly affected (between 6.4% and 8.1% decrease observed) the behavior of the specimens. As the yield strength increases or decreases, the capacity of specimens increase approximately 27.1% or decrease 12.1%. The effects of CFRP ply orientation results have been obtained as a negligible well approximately 3.7% difference. An increasing number of CFRP layers leads to almost no effect (approximately 2.8%) on the behavior of the specimen. Finally, according to the numerical analysis, the ductility values obtained between 4.0 and 6.9 indicate that the beams have sufficient ductility capacity.
 
Key Words
    beam; CFRP; composite; concrete; fiber orientations; hashin failure; numerical study; strengthening; wrapping
 
Address
Ceyhun Aksoylu, Mohammed Alsdudi and Musa Hakan Arslan:Department of Civil Engineering, Konya Technical University, 42130, Konya, Turkey

Yasin Onuralp Ozkilic:Department of Civil Engineering, Necmettin Erbakan University, 42100, Konya, Turkey

Şakir Yazman:IIgin Vocational School, Selcuk University, 42615, Konya, Turkey

Lokman Gemi:Meram Vocational School, Necmettin Erbakan University, 42100, Konya, Turkey
 

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