Structural Engineering and Mechanics

  • 제44권6호
  • /
  • Pages.815-837
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  • 2012
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Improved interfacial stress analysis of a plated beam

  • Hao, Sheng-Wang (School of Civil Engineering and Mechanics, Yanshan University) ;
  • Liu, Yan (School of Civil Engineering and Mechanics, Yanshan University) ;
  • Liu, Xiao-Dan (School of Civil Engineering and Mechanics, Yanshan University)
  • 투고 : 2012.03.21
  • 심사 : 2012.11.13
  • 발행 : 2012.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

A plated beam is strengthened by bonding a thin plate to the tension face; it often fails because of premature debonding of the thin plate from the original beam in a brittle manner. A sound understanding of the mechanism of such debonding failure is very important for the effective use of this strengthening technique. This paper presents an improved analytical solution for interfacial stresses that incorporates multiple loading conditions simultaneously, including prestress, mechanical and thermal loads, and the effects of adherend shear deformations and curvature mismatches between the beam and the plate. Simply supported beams bonded with a thin prestressing plate and subjected to both mechanical and thermal loading were considered in the present work. The effects of the curvature mismatch and adherend shear deformations of the beam and plate were investigated and compared. The main mechanisms affecting the distribution of interfacial stresses were analyzed. Both the normal and shear stresses were found to be significantly influenced by the coupled effects of the elastic moduli with the ratios $E_a/E_b$ and $E_a/E_p$.

키워드

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  1. Intermediate crack-induced debonding analysis for RC beams strengthened with FRP plates vol.56, pp.3, 2015, https://doi.org/10.12989/sem.2015.56.3.473
  2. Effect of tapered-end shape of FRP sheets on stress concentration in strengthened beams under thermal load vol.17, pp.5, 2014, https://doi.org/10.12989/scs.2014.17.5.601
  3. Predictions of the maximum plate end stresses of imperfect FRP strengthened RC beams: study and analysis vol.9, pp.4, 2012, https://doi.org/10.12989/amr.2020.9.4.265