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TitleTension-stiffening model for FRC reinforced by hybrid FRP and steel bars
Author(s)Mazaheripour, Hadi
Barros, Joaquim A. O.
Sena-Cruz, José
FRP and Steel bars
Analytical model
Analytical modelling
Finite element analysis (FEA)
A. Fibres
A. Hybrid
C. Analytical modelling
C. Finite element analysis (FEA)
Issue dateMar-2016
JournalComposites Part B: Engineering
Abstract(s)This paper presents a tension stiffening model for Fiber Reinforced Concrete (FRC) tensile member reinforced by hybrid glass fiber reinforced polymer (GFRP) and steel bars. The model is developed through an explicit analytical bond formulation by considering a four-linear bond shear stress-slip relationship to simulate the bond behavior between reinforcing bars and surrounding FRC. The model is also capable of simulating both the fiber reinforcement contribution and the yielding stage of steel bar at cracked section. Additionally, a FE Model is carried out using a multi-directional smeared crack approach for modeling cracking process in FRC, and adopting interface finite elements to simulate the bond behavior between reinforcements and FRC, whose constitutive model was defined from the aforementioned bond law. Both the analytical and numerical approaches showed a good agreement with some recent experimental results on tension-stiffening in the literature. Finally, an extensive parametric study is performed by using the analytical model, and the influence of the involved parameters on the tension-stiffening and cracking behavior of hybrid GFRP/steel FRC tensile member is investigated.
AccessOpen access
Appears in Collections:ISISE - Artigos em Revistas Internacionais

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