首页|Evaluation of the flexural capacity of RC slabs strengthened with combined EBROG-EBR prestressed CFRP strips and an innovative composite anchorage system
Evaluation of the flexural capacity of RC slabs strengthened with combined EBROG-EBR prestressed CFRP strips and an innovative composite anchorage system
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NETL
NSTL
Elsevier
The Externally Bonded Reinforcement on Groove (EBROG) is an innovative technique for strengthening concrete structures using CFRP strips, that has enabled the development of a fully composite solution for prestressed strips. This study presents the results of a large-scale experimental campaign on six reinforced concrete slab strips, each 6 m long, tested using a six-point bending setup and strengthened with both non-prestressed and prestressed, EBR and EBROG techniques. The research aimed to validate the effectiveness and reliability of the EBROG technique coupled with a recently developed anchorage system and to investigate the performance of a novel strengthening approach that combines both EBR and EBROG techniques. In this latter solution, the EBROG technique is applied in the anchorage zones, while the EBR technique is used over the remaining slab length. The approach was considered to simplify the application process without compromising the effectiveness of the strengthening. The test results showed that the EBROG solution can increase load carrying capacity by more than 32 % compared to a non-prestressed EBR solution. By combining EBROG and EBR, similar loading behaviour was observed, demonstrating that it is a valid alternative for slabs and beams where intermediate debonding is not the dominant failure mode. The experimental results are supported by the numerical study, which, through the simulation of interface slips between the FRP and the concrete substrate, allows for an accurate understanding of the load transfer mechanism between concrete and CFRP in the different strengthened systems.
Prestressed FRPNumerical modelingExternally Bonded Reinforcement of Groove(EBROG)EBRAnchorageConcreteBONDGROOVE
Breveglieri, Matteo、Martinelli, Enzo、Moshiri, Niloufar、Czaderski, Christoph
NETL
NSTL
Elsevier
