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GFRP - Reinforced Prestressed Concrete Slabs: Experimental Analysis
Abstract:
The presented study focuses on the theoretical and experimental analysis of slabs with non-metallic GFRP (glass fiber reinforced polymer) bars as a prestressing reinforcement in concrete structures [25]. In this study, experimentally designed GFRP-reinforced prestressed concrete slabs were developed as a lost formwork on the bridge girders. Using prestressed GFRP could effectively minimize thickness, reduce crack widths, improve flexural performance, and lower the deflections of the slabs. Due to the corrosion-resistant behavior of GFRP, it is possible to minimize the thickness of the slab by reducing the concrete cover, which leads to a reduction in the self-weight of the member. Members with GFRP reinforcements deformed approximately linearly under increasing load. The first elastic part with no cracks observed during loading is typical for small increments of deflection within the rising bending moment. The stiffness of the member reduces after crack formation. The second part of the diagram is called linear-elastic, with increasing deflection of the slab due to the linear-elastic behavior of GFRP. The results obtained were compared with analytical models for ultimate flexural resistance and load deflection behavior at each loading step evaluated using the design equations introduced in ACI 440.1R-15 and ACI 440.4R-04. For a non-linear analysis software for FEM, Atena was used, which considered geometrical and physical non-linearity. The differences in the analytically calculated models to estimate the bending capacity and deflections in the middle span of the prestressed slabs with experimental results and nonlinear FEM analysis were evaluated.
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57-64
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May 2026
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© 2026 Trans Tech Publications Ltd. All Rights Reserved
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