The main aim of the paper is the analysis of the moment redistribution capacity of continuous reinforced concrete beams strengthened with fiber-reinforced polymer (FRP) sheets. The interest of the topic lies in the well-known aspect related to the reduction of ductility, very often exhibited by FRP-strengthened structures. This lack of ductility can strongly affect or even prevent the redistribution of bending moments in continuous FRP-strengthened structures. To study this problem, an analytical model, developed by the authors, is adopted, which is able to simulate the nonlinear behavior of reinforced concrete beams with external reinforcement. The obtained results are validated with numerical outcomes and experimental data available in the literature. A wide parametric survey allows the authors to point out the influence of the amount of FRP and its arrangement on the bending moment redistribution capacity of different continuous beams. Finally, a simplified formulation for the evaluation of the redistribution ratio is proposed and its effectiveness is highlighted.

Coccia, S., Ianniruberto, U., Rinaldi, Z. (2008). Redistribution of bending moment in continuous reinforced concrete beams strengthened with fiber-reinforced polymer. ACI STRUCTURAL JOURNAL, 105(3), 318-326.

Redistribution of bending moment in continuous reinforced concrete beams strengthened with fiber-reinforced polymer

COCCIA, SIMONA;IANNIRUBERTO, UGO;RINALDI, ZILA
2008-05-01

Abstract

The main aim of the paper is the analysis of the moment redistribution capacity of continuous reinforced concrete beams strengthened with fiber-reinforced polymer (FRP) sheets. The interest of the topic lies in the well-known aspect related to the reduction of ductility, very often exhibited by FRP-strengthened structures. This lack of ductility can strongly affect or even prevent the redistribution of bending moments in continuous FRP-strengthened structures. To study this problem, an analytical model, developed by the authors, is adopted, which is able to simulate the nonlinear behavior of reinforced concrete beams with external reinforcement. The obtained results are validated with numerical outcomes and experimental data available in the literature. A wide parametric survey allows the authors to point out the influence of the amount of FRP and its arrangement on the bending moment redistribution capacity of different continuous beams. Finally, a simplified formulation for the evaluation of the redistribution ratio is proposed and its effectiveness is highlighted.
mag-2008
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ICAR/09 - TECNICA DELLE COSTRUZIONI
English
Con Impact Factor ISI
fiber-reinforced polymer; moment redistribution; reinforcement
Coccia, S., Ianniruberto, U., Rinaldi, Z. (2008). Redistribution of bending moment in continuous reinforced concrete beams strengthened with fiber-reinforced polymer. ACI STRUCTURAL JOURNAL, 105(3), 318-326.
Coccia, S; Ianniruberto, U; Rinaldi, Z
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/13437
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