Shear design of reinforced concrete beams with FRP longitudinal and transverse reinforcement
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...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/27331 |
| Acceso en línea: | https://hdl.handle.net/2117/27331 https://dx.doi.org/10.1016/j.compositesb.2014.12.031 |
| Access Level: | acceso abierto |
| Palabra clave: | 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 Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigó |
| Sumario: | 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. |
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