Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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An Experimantal Study on Flexural Behavior of RC Beams Strengthened with Near Surface Mounted Prestressed FRP

프리스트레스를 도입한 FRP 표면매립 보강보의 휨거동에 관한 실험적 연구

  • 홍성남 (성균관대학교 토목환경공학과) ;
  • 박준명 (성균관대학교 토목환경공학과) ;
  • 박선규 (성균관대학교 토목환경공학과) ;
  • 박종섭 (한국건설기술연구원) ;
  • 박영환 (한국건설기술연구원)
  • Published : 2006.12.31
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Abstract

Strengthening concrete structures with fiber reinforced polymer materials have grown to be a widely used method over most parts of the world today, which FRP was developed in 1960. A method to apply prestressing force to FRP is developed newly in these days, which can use the maximum performance of FRP materials. This paper presents the results of a study on improvement in flexural capacities of RC beams strenthened with near surface mounted prestressed CFRP rod and plate. Experimental variables include type of CFRP, prestressing level. Tests show that prestressed beams exhibit a higher crack-load as well as a higher steel-yielding load compared to non-prestressed strengthened beams.

1960년대 내부식성이 뛰어난 FRP가 개발되면서 FRP를 이용하여 콘크리트 구조물을 보강하는 방법은 전 세계적으로 광범위하게 사용되었다. 그리고, FRP의 재료적 성능을 최대한 발휘할 수 있는 것으로 FRP에 긴장력을 가하는 방법이 새롭게 대두 되었다. 본 연구에서는 실험 변수를 긴장재의 종류, 긴장력으로 하여 RC보를 표면매립공법으로 보강하여 휨성능 향상에 대한 실험을 실시하였다. 실험 결과 긴장력의 증가에 따라 균열하중 및 항복하중이 표준실험체에 비해 증가하는 것으로 나타났다.

Keywords

References

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Cited by

  1. Prestressing Effects on the Performance of Concrete Beams with Near-surface-mounted Carbon-fiber-reinforced Polymer Bars vol.52, pp.3, 2016, https://doi.org/10.1007/s11029-016-9583-2
  2. Flexural Response of Reinforced Concrete Beams Strengthened with Near-Surface-Mounted Fe-Based Shape-Memory Alloy Strips vol.12, pp.1, 2018, https://doi.org/10.1186/s40069-018-0279-y