United States Department of Transportation
i
Design and Numerical Evaluation of GFRP Reinforcement for Concrete Bridge Railing
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2024-01-01
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[PDF-6.00 MB]
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Edition:Final Report Jan 2021 – Dec 2021
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Abstract:The main objective of this research is to design a concrete barrier that is reinforced with glass fiber reinforced polymer (GFRP) materials. The design is based on the MoDOT Type D concrete barriers with steel bar reinforcements. The constructability of the GFRP reinforcement was also considered during the design process. This design adjusts the sizes and dimensions to match the properties of GFRP reinforcements. This exchange of the reinforcement materials is meant to take advantage of the preservative properties of GFRP materials to enhance the resistance to corrosion introduced degradation and damage. The strength as well as the behavior of GFRP reinforced concrete barrier under different types of loadings is then explored and modeled using commercial software ABAQUS and LS-Dyna. The static loading is firstly applied to the GFRP and steel bar reinforced concrete barriers for comparison. Different concrete barrier models are also considered to study the influence of different cast approaches. Afterwards, the behaviors of GFRP reinforced concrete barriers under car and truck impact scenarios are also modeled. Simplified models as well as full size models are both studied using ABAQUS and LS-Dyna separately. Truck collisions with different angles are considered to explore the behavior of GFRP reinforced concrete barrier under different possible collision scenarios. The modeling results show that the reaction forces from the dynamic impact modeling are much lower than the design strength.
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