Premature brittle failures because of seismic actions strongly affect the behavior of existing reinforced concrete (RC) structural systems. They commonly involve exterior beam-column joints of structures designed without transverse reinforcement. This paper investigates the behavior of unconfined joints that do not conform to current seismic codes and the effectiveness of externally bonded fiberreinforced polymers (FRPs) as a strengthening technique. It presents an experimental program carried out on six full-scale RC corner joints under constant axial load and transverse cyclic loading in the as-built and FRP-strengthened configuration. After describing the specimen design strategy and test setup, seismic performance is compared. Particular attention is paid to comparing the experimental capacity of as-built joints and the capacity, which can be predicted on the basis of models available in the literature. Finally, a discussion on the effectiveness of different FRP-strengthening layouts is reported.

Experimental Investigation of Exterior RC Beam-Column Joints Retrofitted with FRP Systems / DEL VECCHIO, Ciro; DI LUDOVICO, Marco; Balsamo, Alberto; Prota, Andrea; Manfredi, Gaetano; Dolce, Mauro. - In: JOURNAL OF COMPOSITES FOR CONSTRUCTION. - ISSN 1090-0268. - 18:4(2014). [10.1061/(ASCE)CC.1943-5614.0000459]

Experimental Investigation of Exterior RC Beam-Column Joints Retrofitted with FRP Systems

DEL VECCHIO, CIRO;DI LUDOVICO, MARCO;BALSAMO, ALBERTO;PROTA, ANDREA;MANFREDI, GAETANO;DOLCE, MAURO
2014

Abstract

Premature brittle failures because of seismic actions strongly affect the behavior of existing reinforced concrete (RC) structural systems. They commonly involve exterior beam-column joints of structures designed without transverse reinforcement. This paper investigates the behavior of unconfined joints that do not conform to current seismic codes and the effectiveness of externally bonded fiberreinforced polymers (FRPs) as a strengthening technique. It presents an experimental program carried out on six full-scale RC corner joints under constant axial load and transverse cyclic loading in the as-built and FRP-strengthened configuration. After describing the specimen design strategy and test setup, seismic performance is compared. Particular attention is paid to comparing the experimental capacity of as-built joints and the capacity, which can be predicted on the basis of models available in the literature. Finally, a discussion on the effectiveness of different FRP-strengthening layouts is reported.
2014
Experimental Investigation of Exterior RC Beam-Column Joints Retrofitted with FRP Systems / DEL VECCHIO, Ciro; DI LUDOVICO, Marco; Balsamo, Alberto; Prota, Andrea; Manfredi, Gaetano; Dolce, Mauro. - In: JOURNAL OF COMPOSITES FOR CONSTRUCTION. - ISSN 1090-0268. - 18:4(2014). [10.1061/(ASCE)CC.1943-5614.0000459]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/586595
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