Title: Experimental Behaviour of Precast Tunnel Segments in Steel Fiber Reinforcement with GFRP Rebars
Author(s): Meda, A.; Rinaldi, Z.; Spagnuolo, S.; De Rivaz, B.; Giamundo, N.
Publication: Symposium Paper
Appears on pages(s): 153-162
Keywords: Tunnel segments, hybrid solution, Fiber reinforced concrete, GFRP reinforcement, full scale tests.
The interest in using fiber reinforced concrete (FRC) for the production of precast
segments in tunnel lining, installed with Tunnel Boring Machines (TBMs), is continuously
growing, as witnessed by the studies available in literature and by the actual applications. The
possibility of adopting a hybrid solution of FRC tunnel segments with Glass Fiber Reinforced
Polymer (GFRP) reinforcement is investigated herein. Full-scale tests were carried out on
FRC segments with and without GFRP cage, with a typical geometry of metro tunnels. In
particular, both flexural and point load full-scale tests were carried out, for the evaluation of
the structural performances (both in terms of structural capacity and crack pattern evolution)
under bending, and under the TBM thrust. Finally, the obtained results are compared, in order
to judge the effectiveness of the proposed technical solution.