Computers and Concrete

  • 제6권3호
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  • Pages.235-252
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  • 2009
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Predicting the flexural capacity of RC beam with partially unbonded steel reinforcement

  • Wang, Xiao-Hui (Department of Civil Engineering, Shanghai Jiaotong University) ;
  • Liu, Xi-La (Department of Civil Engineering, Shanghai Jiaotong University)
  • 투고 : 2008.10.07
  • 심사 : 2009.06.15
  • 발행 : 2009.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

Due to the reduction of bond strength resulting from the high corrosion level of reinforcing bars, influence of this reduction on flexural capacity of reinforced concrete (RC) beam should be considered. An extreme case is considered, where bond strength is complete lost and/or the tensile steel are exposed due to heavy corrosion over a fraction of the beam length. A compatibility condition of deformations of the RC beam with partially unbonded length is proposed. Flexural capacity of this kind of RC beam is predicted by combining the proposed compatibility condition of deformations with equilibrium condition of forces. Comparison between the model's predictions with the experimental results published in the literature shows the practicability of the proposed model. Finally, influence of some parameters on the flexural capacity of RC beam with partially unbonded length is discussed. It is concluded that the flexural capacity of the beam may not be influenced by the completely loss of bond of the whole beam span as long as the tensile steel can yield; whether or not the reduction of the flexural capacity of the beam resulting from the loss of bond over certain length may occur depends on the detailed parameters of the given beam.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

참고문헌

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피인용 문헌

  1. Maximum concrete stress developed in unconfined flexural RC members vol.8, pp.2, 2011, https://doi.org/10.12989/cac.2011.8.2.207
  2. Minimum deformability design of high-strength concrete beams in non-seismic regions vol.8, pp.4, 2011, https://doi.org/10.12989/cac.2011.8.4.445
  3. Investigating the effect of bond slip on the seismic response of RC structures vol.46, pp.5, 2013, https://doi.org/10.12989/sem.2013.46.5.695
  4. Effect of bond and corrosion within partial length on shear behaviour and load capacity of RC beam vol.25, pp.4, 2011, https://doi.org/10.1016/j.conbuildmat.2010.11.081
  5. Analysis of RC beam with unbonded or exposed tensile steel reinforcements and defective stirrup anchorages for shear strength vol.10, pp.1, 2012, https://doi.org/10.12989/cac.2012.10.1.059