Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Relationship between fatigue resistance and fracture behavior of the carbon fiber sheet and carbon fiber strand sheet reinforced RC slabs

Carbon fiber sheet 및 carbon fiber strand sheet 접착보강한 RC 상판의 내피로성과 파괴거동과의 상관관계

  • Won, Chan Ho (The Research Institute of Industrial Science, Hanyang University) ;
  • Abe, Tadashi (Dept. of Civil Engineering, College of Industrial Technology, Nihon University) ;
  • Ahn, Tae-Ho (International Sustainable Engineering Materials (ISEM) Center, Ceramic Materials Institute & Division of Advanced Materials Sci. Eng., Hanyang University) ;
  • Kim, Do Keun (Dept. of Civil and Environmental Engineering, Hanyang University)
  • 원찬호 (한양대학교 부설산업과학연구소) ;
  • ;
  • 안태호 (한양대학교 신소재공학과, 세라믹연구소 국제지속가능공학소재(ISEM)센터) ;
  • 김도근 (한양대학교 건설환경공학과)
  • Received : 2015.11.19
  • Accepted : 2015.11.27
  • Published : 2015.12.31
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Abstract

According to the results of "Highway Bridges Long Life Repair Plan." The most serious damage to RC slabs is caused by fatigue deterioration, which results from the driving loads of large-sized vehicles, and aging of materials. In response to this, adhesion reinforcement using carbon fiber sheet is being adopted. In addition, carbon fiber strand sheet that holds the same material characteristics as CFS, but has superior workability, has been developed as a new reinforcement material. However, almost no studies have been conducted on CFSS in relation to fatigue resistance evaluation through fatigue tests under running wheel loads, with the exception of a few by some organizations. Therefore, in this study, specimens with front CFS adhesion reinforcement on the bottom surface of the RC slab and specimens with grid-type CFSS reinforcement were manufactured. Then, fatigue tests under running wheel loads were conducted, and thus fatigue resistance was evaluated using the specimens.

일본 국토교토성이 책정한 <도로교 장수명화 수선계획사업>에 의하면, 주요 지역에 건설된 RC 상판의 심각한 손상 원인은 대형차량의 주행하중에 의한 피로열화와 재료의 경년열화 등으로 보고되어지고 있다. 따라서 이에 대한 대책으로 탄소섬유 시트를 이용한 하부 접착 보강공법이 많이 소개되어지고 있으나, 최근에는 CFS와 동등한 재료특성치를 보유하며, 시공성이 뛰어난 탄소섬유 스트랜드 시트가 새로운 보강재료로써 관심이 증폭되어지고 있다. 그러나 이러한 CFSS의 윤하중 피로실험을 통한 내피로성 평가는 현재 일부 연구기관에서만 그 성과가 보고되어지고 있는 실정이며, 국내에서는 아직까지 연구성과에 관한 보고 등이 거의 없는 실정이다. 따라서 본 연구에서는 RC 상판의 하부에 CFS를 전면접착 보강한 실험체와 CFSS를 격자형으로 보강한 실험체를 제작하여, 윤하중 피로실험을 실시하고 내피로성을 평가하였다.

Keywords

References

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  1. Reinforcing effects of carbon fiber sheet by compressive strength differences on the RC slabs vol.26, pp.1, 2016, https://doi.org/10.6111/JKCGCT.2016.26.1.023