Reference : A Shear Strength Model for FRC Coupling Beams
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Civil engineering
A Shear Strength Model for FRC Coupling Beams
Mihaylov, Boyan mailto [Université de Liège - ULiège > Département ArGEnCo > Structures en béton >]
Better, Smarter, Stronger Proceedings for the 2018 fib Congerss held in Melbourne
The International Federation for Structural Concrete 5th International fib Congress
7-11 October 2018
The International Federation for Structural Concrete
[en] Short coupling beams are susceptible to brittle shear failures that need to be suppressed with dense shear reinforcement. To reduce the amount of reinforcement and improve the service behavior, researchers have proposed a solution with steel fiber-reinforced concrete (FRC). However, while this solution is promising, there are no sufficiently simple mechanical models capable of capturing the shear strength of short FRC coupling beams without diagonal reinforcement. This paper proposes such a model based on first principles: kinematics, equilibrium, and constitutive relationships for the mechanisms of shear resistance. The model accounts for five shear mechanisms whose magnitudes are predicted at failure. When compared to 15 tests, the model is shown to capture well the effect of beam aspect ratio, concrete strength and amount of steel fibres.
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