휨부재의 인장철근비 변화에 따른 섬유보강에폭시 판넬의 보강효과평가
Reinforcement Effect Estimation of Fiber-Reinforcement-Epoxy-Panel by Tensile-Steel-Ratio Variation of Bending Members
- 주제(KDC) 530.4
- 발행기관 東新大學校 工業技術硏究所
- 발행년도 2003
- 총서유형 Journal
- 본문언어 한국어
초록/요약
FREP is a stiffener that is increasingly used in construction fields today. Concerning it, however, the mechanical characteristics of structures reinforced with it, reinforcement design methods, etc. have not been systematically established yet. The present study evaluated the mechanical characteristics of FREP such as fracture behavior, bending stress enhancement, etc. through a bending test using as variables steel ratio of RC beams reinforced with FREP and the thickness of FREP reinforcement. The RC Beams used in the test showed two types of fraction, which were bending tension fraction and edge stripping fracture, and when the ratio of steel ratio (ρ) to FREP ratio (ρ_(F)) is larger than 1.8, it showed edge stripping fracture. Under same reinforcement condition, if steel ratio is relatively low, reinforcement effect appeared to be high. In addition, if reinforcement thickness increases, the flexural rigidity rises and, as a result, the maximum load also increases, but an excessive increase of reinforcement thickness makes stress concentrate on the reinforced end and cause unexpected brittle fracture (edge stripping fracture) even at a light load.
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