Development of fiber reinforced polymer : shape-memory alloy composites for reinforced concrete structures
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- This master thesis focuses on the design and characterization of a novel composite material intended for reinforcement in concrete structures. The developed material consists of epoxy reinforced with hybrid plies of carbon-kevlar fibers, along with thin shape memory alloy (SMA) wires. By combining the inherent strength of conventional fiber reinforced composites (FRP) with the exceptional elastic deformation capacity of SMAs, this hybrid composite offers a unique set of mechanical properties. It preserves the high strength of FRP while also providing enhanced ductility and energy dissipation capabilities, which are missing in current FRP reinforcement materials. These properties are particularly desirable for reinforcing the members in concrete structures that are designed for energy dissipation in regions where seismic hazards are relevant. The fabrication process of the hybrid composite involves a specific and innovative manufacturing protocol. Multiple configurations and SMA percentages are analyzed to explore the influence of these variables on the mechanical behavior and performance of the composite. The hybrid composite is characterized both experimentally and numerically. Experimental testing includes static and dynamic evaluations to assess the material properties and dynamic response. Numerical simulations are performed using the Abaqus/CAE software, enabling the investigation of the composite’s behavior under different loading conditions. This research contributes to advancing the field of composite materials and offers a proposal to enhance the resilience of FRP reinforcement, which has been recently penetrating the market with the expectation of longer service life of corrosion-free reinforcement for concrete structures.