Response behaviour of reinforced concrete beams strengthened in shear with FRP

Piero Colajanni, Nino Spinella, Antonino Recupero

Risultato della ricerca: Conference contribution

Abstract

In this paper an analytical model, able to predict the shear-displacement response of slender RC beams reinforced in shear with FRP, is presented. It allows to evaluate the complete strain and stress fields, for each load step, on the basis of the MCFT framework. The key role of the effective strain of FRP reinforcement at failure has been investigated. At the same time, the interaction FRP-steel stirrups has been taken into account by introducing an appropriate factor. It is able to reproduce the decrease of stirrups stress level when an external reinforcement is used. The proposed model has been validate against a database of specimens collected in literature. Results have shown the remarkable capacity of the presented formulation to reproduce the response behaviour of RC beams strengthening in shear with FRP.
Lingua originaleEnglish
Titolo della pubblicazione ospiteProceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures
Pagine1601-1608
Numero di pagine8
Stato di pubblicazionePublished - 2019

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Reinforced concrete
Reinforcement
Analytical models
Loads (forces)
Steel

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Architecture
  • Civil and Structural Engineering

Cita questo

Colajanni, P., Spinella, N., & Recupero, A. (2019). Response behaviour of reinforced concrete beams strengthened in shear with FRP. In Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures (pagg. 1601-1608)

Response behaviour of reinforced concrete beams strengthened in shear with FRP. / Colajanni, Piero; Spinella, Nino; Recupero, Antonino.

Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. 2019. pag. 1601-1608.

Risultato della ricerca: Conference contribution

Colajanni, P, Spinella, N & Recupero, A 2019, Response behaviour of reinforced concrete beams strengthened in shear with FRP. in Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. pagg. 1601-1608.
Colajanni P, Spinella N, Recupero A. Response behaviour of reinforced concrete beams strengthened in shear with FRP. In Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. 2019. pag. 1601-1608
Colajanni, Piero ; Spinella, Nino ; Recupero, Antonino. / Response behaviour of reinforced concrete beams strengthened in shear with FRP. Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. 2019. pagg. 1601-1608
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abstract = "In this paper an analytical model, able to predict the shear-displacement response of slender RC beams reinforced in shear with FRP, is presented. It allows to evaluate the complete strain and stress fields, for each load step, on the basis of the MCFT framework. The key role of the effective strain of FRP reinforcement at failure has been investigated. At the same time, the interaction FRP-steel stirrups has been taken into account by introducing an appropriate factor. It is able to reproduce the decrease of stirrups stress level when an external reinforcement is used. The proposed model has been validate against a database of specimens collected in literature. Results have shown the remarkable capacity of the presented formulation to reproduce the response behaviour of RC beams strengthening in shear with FRP.",
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N2 - In this paper an analytical model, able to predict the shear-displacement response of slender RC beams reinforced in shear with FRP, is presented. It allows to evaluate the complete strain and stress fields, for each load step, on the basis of the MCFT framework. The key role of the effective strain of FRP reinforcement at failure has been investigated. At the same time, the interaction FRP-steel stirrups has been taken into account by introducing an appropriate factor. It is able to reproduce the decrease of stirrups stress level when an external reinforcement is used. The proposed model has been validate against a database of specimens collected in literature. Results have shown the remarkable capacity of the presented formulation to reproduce the response behaviour of RC beams strengthening in shear with FRP.

AB - In this paper an analytical model, able to predict the shear-displacement response of slender RC beams reinforced in shear with FRP, is presented. It allows to evaluate the complete strain and stress fields, for each load step, on the basis of the MCFT framework. The key role of the effective strain of FRP reinforcement at failure has been investigated. At the same time, the interaction FRP-steel stirrups has been taken into account by introducing an appropriate factor. It is able to reproduce the decrease of stirrups stress level when an external reinforcement is used. The proposed model has been validate against a database of specimens collected in literature. Results have shown the remarkable capacity of the presented formulation to reproduce the response behaviour of RC beams strengthening in shear with FRP.

KW - FRP

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KW - Modelling

KW - RC beam

KW - Shear

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BT - Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures

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