Structural Engineering and Mechanics

  • 제30권4호
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  • Pages.403-426
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  • 2008
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Flexural ductility of reinforced HSC beams strengthened with CFRP sheets

  • 투고 : 2006.09.12
  • 심사 : 2008.09.10
  • 발행 : 2008.11.10
⟨ 이전 논문 다음 논문 ⟩

초록

Externally bonding fiber reinforced polymer (FRP) sheets with an epoxy resin is an effective technique for strengthening and repairing reinforced concrete (RC) beams under flexural loads. Their resistance to electro-chemical corrosion, high strength-to-weight ratio, larger creep strain, fatigue resistance, and nonmagnetic and nonmetallic properties make carbon fiber reinforced polymer (CFRP) composites a viable alternative to bonding of steel plates in repair and rehabilitation of RC structures. The objective of this investigation is to study the effectiveness of CFRP sheets on ductility and flexural strength of reinforced high strength concrete (HSC) beams. This objective is achieved by conducting the following tasks: (1) flexural four-point testing of reinforced HSC beams strengthened with different amounts of cross-ply of CFRP sheets with different amount of tensile reinforcement up to failure; (2) calculating the effect of different layouts of CFRP sheets on the flexural strength; (3) Evaluating the failure modes; (4) developing an analytical procedure based on compatibility of deformations and equilibrium of forces to calculate the flexural strength of reinforced HSC beams strengthened with CFRP composites; and (5) comparing the analytical calculations with experimental results.

키워드

참고문헌

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피인용 문헌

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  2. Performance of HSC columns under severe cyclic loading vol.13, pp.2, 2015, https://doi.org/10.1007/s10518-014-9617-x
  3. Moment redistribution and ductility of CFRP strengthened and non-strengthened unbonded post-tensioned indeterminate I-beams composed of UHSSCC vol.174, 2017, https://doi.org/10.1016/j.compstruct.2017.04.057
  4. New hybrid cement-based composite material externally bonded to control RC beam cracking vol.36, 2012, https://doi.org/10.1016/j.conbuildmat.2012.04.104
  5. Experimental investigations and verification of debonding strain of RHSC continuous beams strengthened in flexure with externally bonded FRPs vol.43, pp.6, 2008, https://doi.org/10.1617/s11527-009-9550-7
  6. Normalised rotation capacity for deformability evaluation of high-performance concrete beams vol.1, pp.3, 2008, https://doi.org/10.12989/eas.2010.1.3.269
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  10. Inelastic design of high-axially loaded concrete columns in moderate seismicity regions vol.39, pp.4, 2008, https://doi.org/10.12989/sem.2011.39.4.559
  11. Concurrent flexural strength and deformability design of high-performance concrete beams vol.40, pp.4, 2008, https://doi.org/10.12989/sem.2011.40.4.541
  12. A stress-function variational approach toward CFRP -concrete interfacial stresses in bonded joints vol.9, pp.1, 2008, https://doi.org/10.12989/acc.2020.9.1.043
  13. Identification of Fracture Mechanic Properties of Concrete and Analysis of Shear Capacity of Reinforced Concrete Beams without Transverse Reinforcement vol.13, pp.12, 2008, https://doi.org/10.3390/ma13122788
  14. Performance of an innovative anchorage system for strengthening RC beams in adjacency of columns with FRP laminates vol.28, pp.None, 2008, https://doi.org/10.1016/j.istruc.2020.08.075
  15. An innovative technique of anchoring lacing bars with CFS sections for shear strengthening of RC beams vol.7, pp.1, 2008, https://doi.org/10.1007/s41062-021-00722-7