Steel and Composite Structures

  • 제15권6호
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  • Pages.623-643
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  • 2013
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Flexural behaviour of CFST members strengthened using CFRP composites

  • Sundarraja, M.C. (Thiagarajar College of Engineering) ;
  • Prabhu, G. Ganesh (Sethu Institute of Technology)
  • 투고 : 2011.05.09
  • 심사 : 2013.09.02
  • 발행 : 2013.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Concrete filled steel tubular members (CFST) become a popular choice for modern building construction due to their numerous structural benefits and at the same time aging of those structures and member deterioration are often reported. Therefore, actions like implement of new materials and strengthening techniques become essential to combat this problem. The application of carbon fibre reinforced polymer (CFRP) with concrete structures has been widely reported whereas researches related to strengthening of steel structures using fibre reinforced polymer (FRP) have been limited. The main objective of this study is to experimentally investigate the suitability of CFRP to strengthening of CFST members under flexure. There were three wrapping schemes such as Full wrapping at the bottom (fibre bonded throughout entire length of beam), U-wrapping (fibre bonded at the bottom throughout entire length and extended upto neutral axis) and Partial wrapping (fibre bonded in between loading points at the bottom) introduced. Beams strengthened by U-wrapping exhibited more enhancements in moment carrying capacity and stiffness compared to the beams strengthened by other wrapping schemes. The beams of partial wrapping exhibited delamination of fibre and were failed even before attaining the ultimate load of control beam. The test results showed that the presence of CFRP in the outer limits was significantly enhanced the moment carrying capacity and stiffness of the beam. Also, a non linear finite element model was developed using the software ANSYS 12.0 to validate the analytical results such as load-deformation and the corresponding failure modes.

키워드

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피인용 문헌

  1. The enhanced performance of CFST beams using different strengthening schemes involving unidirectional CFRP sheets: An experimental study vol.128, 2016, https://doi.org/10.1016/j.engstruct.2016.09.044
  2. Rehabilitation and strengthening of high-strength rectangular CFST beams using a partial wrapping scheme of CFRP sheets: Experimental and numerical study vol.114, 2017, https://doi.org/10.1016/j.tws.2017.01.028
  3. Long-term structural analysis and stability assessment of three-pinned CFST arches accounting for geometric nonlinearity vol.20, pp.2, 2016, https://doi.org/10.12989/scs.2016.20.2.379
  4. Investigation of the behavior of deficient steel members strengthened using carbon fiber reinforced polymer under combined compressive load and torsional moment pp.1537-6532, 2018, https://doi.org/10.1080/15376494.2018.1501833
  5. CFRP-Strengthened HSS Columns Subject to Eccentric Loading vol.22, pp.4, 2018, https://doi.org/10.1061/(ASCE)CC.1943-5614.0000861
  6. Behaviour of bolted connections in concrete-filled steel tubular beam-column joints vol.25, pp.4, 2013, https://doi.org/10.12989/scs.2017.25.4.443
  7. The influence of strengthening the hollow steel tube and CFST beams using U-shaped CFRP wrapping scheme vol.66, pp.2, 2013, https://doi.org/10.12989/sem.2018.66.2.229
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  12. Flexural performance of cold-formed square CFST beams strengthened with internal stiffeners vol.34, pp.1, 2013, https://doi.org/10.12989/scs.2020.34.1.123