Structural Engineering and Mechanics

  • 제53권6호
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  • Pages.1067-1081
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  • 2015
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Experimental and analytical investigations for behaviors of RC beams strengthened with tapered CFRPs

  • Kim, Naeun (Department of Architectural Engineering, Ewha Womans University) ;
  • Kim, Young Hee (Department of Architectural Engineering, Ewha Womans University) ;
  • Kim, Hee Sun (Department of Architectural Engineering, Ewha Womans University)
  • 투고 : 2013.09.08
  • 심사 : 2014.10.09
  • 발행 : 2015.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study investigates structural and mechanical behaviors of RC (Reinforced concrete) beams strengthened with tapered CFRP (Carbon fiber reinforced polymer) sheets having various configurations. Toward this goal, experiments are performed on RC beams strengthened with four layers of CFRP sheets and each layer of the CFRP is prepared to have different length. Experimental results show that tapered CFRPs have better strengthening effect than non-tapered CFRP sheets and maximum loads of the beams with tapered CFRPs are governed by the length of first CFRP layer rather than total length of CFRP layers. In addition, analyses are performed using FE (Finite Element) models including cohesive elements to predict debonding behaviors between FRP and concrete elements. The predicted results from the FE models show good agreement with the experimental results.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF)

참고문헌

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피인용 문헌

  1. The effects of CFRP orientation on the strengthening of reinforced concrete structures vol.25, pp.15, 2016, https://doi.org/10.1002/tal.1282
  2. Retrofitting of RC girders using pre-stressed CFRP sheets vol.20, pp.4, 2016, https://doi.org/10.12989/scs.2016.20.4.833
  3. Absolute effective elastic constants of composite materials vol.57, pp.5, 2016, https://doi.org/10.12989/sem.2016.57.5.897
  4. Minimum cost design of overhead crane beam with box section strengthened by CFRP laminates vol.61, pp.4, 2015, https://doi.org/10.12989/sem.2017.61.4.475
  5. Modified DEBA for determining size dependent shear fracture energy of laminates vol.28, pp.1, 2018, https://doi.org/10.12989/scs.2018.28.1.111