Steel and Composite Structures

  • 제15권6호
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  • Pages.659-677
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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

Mechanical properties of steel-CFRP composite specimen under uniaxial tension

  • Uriayer, Faris A. (Department of Civil Engineering, Jamia Millia Islamia (Kufa Universit)) ;
  • Alam, Mehtab (Department of Civil Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia)
  • 투고 : 2012.07.21
  • 심사 : 2013.09.05
  • 발행 : 2013.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper introduces new specimens of Steel-Carbon Fibre Reinforced Polymer composite developed in accordance with standard test method and definition for mechanical testing of steel (ASTM-A370). The main purpose of this research is to study the behaviour of steel-CFRP composite specimen under uniaxial tension to use it in beams in lieu of traditional steel bar reinforcement. Eighteen specimens were prepared and divided into six groups, depending upon the number of the layers of CFRP. Uniaxial tensile tests were conducted to determine yield strength and ultimate strength of specimens. Test results showed that the stress-strain curve of the composite specimen was bilinear prior to the fracture of CFRP laminate. The tested composite specimens displayed a large difference in strength with remarkable ductility. The ultimate load for Steel-Carbon Fibre Reinforced Polymer composite specimens was found using the model proposed by Wu et al. (2010) and nonlinear FE analysis. The ultimate loads obtained from FE analysis are found to be in good agreement with experimental ones. However, ultimate loads obtained applying Wu model are significantly different from experimental/FE ones. This suggested modification of Wu model. Modified Wu's model which gives a better estimate for the ultimate load of Steel-Carbon Fibre Reinforced Polymer (SCFRP) composite specimen is presented in this paper.

키워드

참고문헌

  1. ASTM A370-02 (2002), "Standard test methods and definitions for mechanical testing of steel products", American Society for Testing Materials.
  2. Fawzia, S., Al-Mahaidi, R., Zhao, X.L. and Rizkalla, S. (2007), "Strengthening of circular hollow steel tubular sections using high modulus CFRP sheet", Construct. Build. Mat., 21(4), 839-845. https://doi.org/10.1016/j.conbuildmat.2006.06.014
  3. Mohammad, K. and Omran, H.Y. (2008) "Numerical and analytical modeling of RC beams strengthened in flexure with near surface mounted CFRP strips", The 4th National Conference on Civil Engineering, University of Tehran, Tehran, February.
  4. Rizkalla, S. and Hassan, M. (2002), "The effectiveness of FRP for strengthening concrete bridges", Struct. Eng. Int., 12(2), 89-95. https://doi.org/10.2749/101686602777965577
  5. Soric, Z., Kisicek, T. and Galic, J. (2010), "Deflections of concrete beams reinforced with FRP bars", Mater. Struct., 43(1), 73-90. https://doi.org/10.1617/s11527-010-9600-1
  6. Wu, G., Wu, Z.S., Luo, Y.B. and Wei, H. (2009), "New reinforcement material of steel fiber composite bar (SFCB) and its mechanics properties", Proceeding of the 9th International Symposium on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, Sydney, June.
  7. Wu, G., Wu, Z.S., Luo, Y.B., Sun, Z.Y. and Hu, X.Q. (2010), "Mechanical properties of steel-FRP composite bar under Uniaxial and cyclic tensile loads", J. Mater. Civil Eng., 22(10), 1056-1066. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000110
  8. Wu, Y.F. (2006), "New avenue of achieving ductility for reinforced concrete embers", J. Struct. Eng., 132(9), 1502-1506. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:9(1502)

피인용 문헌

  1. Steel-CFRP composite and their shear response as vertical stirrup in beams vol.18, pp.5, 2015, https://doi.org/10.12989/scs.2015.18.5.1145
  2. Numerical study on the rotation capacity of CFRP strengthened cold formed steel beams vol.23, pp.4, 2017, https://doi.org/10.12989/scs.2017.23.4.385
  3. Effects of deficiency location on CFRP strengthening of steel CHS short columns vol.28, pp.3, 2018, https://doi.org/10.12989/scs.2018.28.3.267