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Characteristics of Flexural Capacity and Ultrasonic in RC member with Corroded Steel and FRP Hybrid Bar

부식된 FRP Hybrid Bar의 휨 내력 및 초음파 속도 특성

  • 최세진 (원광대학교 건축공학과) ;
  • 문진만 (한남대학교 건설시스템공학과) ;
  • 박기태 (한국건설기술연구원 구조융합연구소) ;
  • 박철우 (강원대학교 사회기반시스템공학부) ;
  • 권성준 (한남대학교 건설시스템공학과)
  • Received : 2015.03.19
  • Accepted : 2015.05.07
  • Published : 2015.08.28

Abstract

Concrete is a attractive construction material, however durability problem occur due to steel corrosion, which leads propagation to structural safety problem. The recently developed FRP (Fiber Reinforced Plastic) Hybrid Bar has an engineering merit of both structural steel and FRP. Accelerated corrosion test for RC (Reinforced Concrete) samples with normal steel and FRP Hybriud Bar are performed and their flexural capacity is evaluated. Furthermore UV(Ultrasonic Velocity) measurement is attempted for analysis of variation of UV due to corrosion condition. After corrosion test, there is no significant reduction in RC beam with FRP hybrid bar but 11.5% of reduction in the case of normal steel is evaluated with 3.3% of UV reduction. For commercial production of FRP hybrid bar, bond strength evaluation through long-term submerged corrosion is required.

Keywords

Durability;Corrosion;Steel;FRP Hybrid Bar;Ultrasonic Velocity

Acknowledgement

Grant : FRP Hybrid Bar를 활용한 해양항만구조물 수명향상기술 개발

Supported by : 한국건설기술연구원

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