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Shear design of reinforced concrete beams with FRP longitudinal and transverse reinforcement
Oller Ibars, Eva; Marí Bernat, Antonio Ricardo; Bairán García, Jesús Miguel; Cladera Bohigas, Antoni
Universitat Politècnica de Catalunya. Departament d'Enginyeria de la Construcció; Universitat Politècnica de Catalunya. ATEM - Anàlisi i Tecnologia d'Estructures i Materials
The shear resisting mechanisms of reinforced concrete (RC) beams with longitudinal and transverse FRP reinforcement can be affected by the mechanical properties of the FRP rebars. This paper presents a mechanical model for the prediction of the shear strength of FRP RC beams that takes into account its particularities. The model assumes that the shear force is taken by the un-cracked concrete chord, by the residual tensile stresses along the crack length and by the FRP stirrups. Failure is considered to occur when the principal tensile stress at the concrete chord reaches the concrete tensile strength, assuming that the contribution of the FRP stirrups is limited by a possible brittle failure in the bent zone. The accuracy of the proposed method has been verified by comparing the model predictions with the results of 112 tests. The application of the model provides better statistical results (mean value V-test/V-pred equal to 1.08 and COV of 19.5%) than those obtained using the design equations of other current models or guidelines. Due to the simplicity, accuracy and mechanical derivation of the model it results suitable for design and verification in engineering practice. (C) 2015 Elsevier Ltd. All rights reserved.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigó
Concrete beams
Reinforced concrete--Mechanical properties
Strength
Stress transfer
Analytical modelling
FRP stirrups
ARTIFICIAL NEURAL-NETWORKS
FLEXURAL BEHAVIOR
RC MEMBERS
GFRP BARS
STRENGTH
STIRRUPS
EQUATIONS
FAILURE
Bigues de formigó armat -- Proves
Formigó armat -- Reforçament i reparació
info:eu-repo/semantics/publishedVersion
Article
Elsevier
         

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