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Development and testing of GFRP-SMA rebar connections for reinforced concrete members

Deridder, Mathieu ; Sartenaer, Louis
(2023)

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Deridder_55741800_Sartenaer_46821800_2023.pdf
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Details

Supervisors
Saraiva Esteves Pacheco De Almeida, João ; Hoult, Ryan
Faculty
Ecole polytechnique de Louvain
Degree label
Master [120] : ingénieur civil des constructions, à finalité spécialisée
Abstract
This study presents a comprehensive investigation into the potential of Fiber Reinforced Polymer (FRP), particularly Glass Fiber Reinforced Polymer (GFRP), as an effective replacement for steel in Reinforced Concrete (RC) structures. Despite the numerous advantages GFRP offers, including corrosion resistance, high tensile strength, ightweight, non-magnetic properties, and electromagnetic transparency, its low modulus of elasticity and brittle failure mode hinder its application in seismic design. To overcome these limitations, the replacement of GFRP with Shape Memory Alloy (SMA) in the plastic hinge regions of RC structures is investigated. A significant part of this work revolves around the design, testing, characterization, and validation of mechanical couplers for GFRP-Steel, SMA-Steel, and GFRP-SMA connections. Extensive instrumentation is employed for characterization, incorporating Distributed Fiber Optic Sensors (DFOS) across the three materials and inside the couplers. Furthermore, a numerical model in Vector2 is proposed to simulate the behavior of RC reinforced with GFRP. The intended future validation of this model involves comparison with experimental tests on two RC beams: one reinforced exclusively with GFRP, and another utilizing a GFRP and SMA combination. The specifications of these beams and associated testing protocol are detailed within the study. The model is subsequently expanded to incorporate SMA and the developed mechanical couplers, providing a robust foundation for future research and development in this area.