Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Accelerated Test Program for Durability Characteristics of GFRP Rebars

내구특성 파악을 위한 GFRP 보강근의 촉진실험 연구

  • 김형열 (한국건설기술연구원 구조연구부) ;
  • 유영준 (한국건설기술연구원 구조연구부) ;
  • 박영환 (한국건설기술연구원 구조연구부)
  • Received : 2005.01.30
  • Published : 2006.01.27
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Abstract

This paper presents the durability characteristics of commercially available CFRP rebars under various environmental conditions. Two types of GFRP rebars were tested by using an accelerated aging method. A total of 264 rebar specimens were conditioned up to 132 days in the moisture, chloride. alkaline, and freeze-thaw environmental conditions. The durability characteristics of conditioned rebars were obtained by comparing the tensile strength, horizontal shear strength, and elastic modulus between the unconditioned and conditioned GFRP rebars. The test results indicated that the mechanical properties of GFRP were significantly reduced after conditioning. Long-term degradation of GFRP rebars was also estimated using the results of a short-term durability test.

본 논문에서는 다양한 환경인자에 노출된 상용 유리섬유강화(GFRP) 보강근의 내구특성에 대하여 기술하였다. 촉진실험방법을 이용하여 2종류의 GFRP보강근에 대하여 내구성 실험을 실시하였다. 총 264개 시편을 염화물 알칼리, 동결융해 상태에 최고 132일간 노출시켰다. CFRP 보강근의 내구특성은 촉진 실험된 보강근의 인장강도, 수평전단강도, 탄성계수를 원래 상태의 보강근의 결과와 비교하여 파악하였다. 실험결과에 따르면 촉진 실험된 GFRP 보강근의 재료적 특성은 심각하게 감소되었다. 단기 내구성 실험결과를 이용하여 GFRP 보강근의 장기 열화특성을 추정하였다.

Keywords

References

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