GFRP 적용 교량용 SB5-B등급 강성 방호울타리 개발에 관한 연구

초록

Purpose: This study aims to evaluate the structural and performance feasibility of replacing conventional steel reinforcement with glass fiber-reinforced polymer (GFRP) bars in highway bridge rigid safety barriers (SB5-B grade) to address continuous durability degradation caused by chloride-induced corrosion. Method: The research reviewed domestic and international design standards, developed a cross-sectional design by evaluating bending performance and shear capacity, and conducted vehicle collision simulations with five representative cross-sections alongside full-scale crash tests. Result: While the proposed GFRP-reinforced section demonstrated sufficient resistance capacity against design collision loads, the full-scale crash tests revealed that the occupant protection performance requirement was not satisfied because the THIV value exceeded the acceptance limit. Conclusion: This study verified the technical feasibility of GFRP application as a practical alternative for improving the durability of facilities vulnerable to chloride deterioration, and more refined evaluations and crash tests for separated median barriers will be conducted in the follow-up study.

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