The possibility of replacing the traditional steel reinforcement with glass fiber reinforced polymer (GFRP) cages in precast concrete tunnel segmental lining has been shown by the authors in previous papers. The use of GFRP rebars as structural reinforcement in precast tunnel segments, allows several advantages in terms of structural durability or in cases of temporary lining that will have to be demolished later. Furthermore, this reinforcement type can be a suitable solution to create dielectric joints, ensuring the interruption of possible stray currents, which often lead to corrosion problems. Nevertheless, this peculiar application requires curvilinear shape of the reinforcement, and then different production process and rebar geometries. In the present work, a suggestion for the optimization of the GFRP reinforcement for tunnel segment is given. Four different GFRP cage typologies are analysed and applied as a reinforcement in full-scale tunnel segments. Both bending and point load tests are developed and the structural performances of the specimens are compared and discussed. Finally, the best solution, in terms of cost-benefit analysis is proposed.

Caratelli, A., Meda, A., Rinaldi, Z., Spagnuolo, S., Maddaluno, G. (2017). Optimization of GFRP reinforcement in precast segments for metro tunnel lining. COMPOSITE STRUCTURES, 181(1 December 2017), 336-346 [10.1016/j.compstruct.2017.08.083].

Optimization of GFRP reinforcement in precast segments for metro tunnel lining

Caratelli, Angelo;Meda, Alberto;Rinaldi, Zila;Spagnuolo, Simone;
2017

Abstract

The possibility of replacing the traditional steel reinforcement with glass fiber reinforced polymer (GFRP) cages in precast concrete tunnel segmental lining has been shown by the authors in previous papers. The use of GFRP rebars as structural reinforcement in precast tunnel segments, allows several advantages in terms of structural durability or in cases of temporary lining that will have to be demolished later. Furthermore, this reinforcement type can be a suitable solution to create dielectric joints, ensuring the interruption of possible stray currents, which often lead to corrosion problems. Nevertheless, this peculiar application requires curvilinear shape of the reinforcement, and then different production process and rebar geometries. In the present work, a suggestion for the optimization of the GFRP reinforcement for tunnel segment is given. Four different GFRP cage typologies are analysed and applied as a reinforcement in full-scale tunnel segments. Both bending and point load tests are developed and the structural performances of the specimens are compared and discussed. Finally, the best solution, in terms of cost-benefit analysis is proposed.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ICAR/08 - Scienza delle Costruzioni
English
Full-scale tests; GFRP cage prototypes; Glass FRP bars; Tunnel lining segments; Ceramics and Composites; Civil and Structural Engineering
www.elsevier.com/inca/publications/store/4/0/5/9/2/8
Caratelli, A., Meda, A., Rinaldi, Z., Spagnuolo, S., Maddaluno, G. (2017). Optimization of GFRP reinforcement in precast segments for metro tunnel lining. COMPOSITE STRUCTURES, 181(1 December 2017), 336-346 [10.1016/j.compstruct.2017.08.083].
Caratelli, A; Meda, A; Rinaldi, Z; Spagnuolo, S; Maddaluno, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/191271
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