Steel and Composite Structures

  • 제7권1호
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  • Pages.19-34
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  • 2007
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Finite element analysis of slender HSS columns strengthened with high modulus composites

  • Shaat, Amr (Department of Civil Engineering, Queen's University) ;
  • Fam, Amir (Department of Civil Engineering, Queen's University)
  • 투고 : 2005.07.21
  • 심사 : 2006.09.28
  • 발행 : 2007.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents results of a non-linear finite element analysis of axially loaded slender hollow structural section (HSS) columns, strengthened using high modulus carbon-fiber reinforced polymer (CFRP) longitudinal sheets. The model was developed and verified against both experimental and other analytical models. Both geometric and material nonlinearities, which are attributed to the column's initial imperfection and plasticity of steel, respectively, are accounted for. Residual stresses have also been modeled. The axial strength in the experimental study was found to be highly dependent on the column's imperfection. Consequently, no specific correlation was established experimentally between strength gain and amount of CFRP. The model predicted the ultimate loads and failure modes quite reasonably and was used to isolate the effects of CFRP strengthening from the columns' imperfections. It was then used in a parametric study to examine columns of different slenderness ratios, imperfections, number of CFRP layers, and level of residual stresses. The study demonstrated the effectiveness of high modulus CFRP in increasing stiffness and strength of slender columns. While the columns' imperfections affect their actual strengths before and after strengthening,the percentage gain in strength is highly dependent on slenderness ratio and CFRP reinforcement ratio, rather than the value of imperfection.

키워드

참고문헌

  1. Abushaggur, M. and El Damatty, A. A. (2003),"Testing of steel sections retrofitted using FRP sheets", Annual Conference of the Canadian Society for Civil Engineering, Moncton, Nouveau-Brunswick, Canada. June, 4-7, (CD-ROM).
  2. Allen, H. G. and Bulson, P. S. (1980), Background to Buckling, McGraw-Hill Book Company (UK) Limited. S. ANSYS Inc. ANSYS User's Manual, Revision 7.1.
  3. Bjorhovde, R. and Birkemoe, P. C. (1979),"Limit states design of HSS columns", Canadian J. Civ. Eng., 6, 275-291.
  4. Bruneau, M., Uang, C. and Whittaker, A. (1998), Ductile Design of Steel Structures, McGraw-Hill, New York.
  5. Canadian Standards Association, CAN/CSA-S16.1-01, Limit States Design of Steel structures, Mississauga, Ontario.
  6. Chan, S. L., Kitipornchai, S. and Al-Bermani, F. G. A. (1991),"Elasto-plastic analysis of box-columns including local buckling effects", J. Struct. Eng., ASCE, 117(7), 1946-1962. https://doi.org/10.1061/(ASCE)0733-9445(1991)117:7(1946)
  7. Davison, T. A. and Birkemoe, P. C. (1983),"Column behaviour of cold-formed hollow structural steel shapes", Canadian J. Civ. Eng., 10, 125-141. https://doi.org/10.1139/l83-014
  8. Jun Deng, Lee, M. M. K. and Moy, S. S. J. (2004),"Stress analysis of steel beams reinforced with a bonded CFRP plate", Composite Struct., 65, 205-215. https://doi.org/10.1016/j.compstruct.2003.10.017
  9. Kulak, G. L. and Grondin, G. Y. (2002),"Limit states design in structural steel", Canadian Institute of Steel Construction, Alliston, Ontario, Canada.
  10. Sen, R., Liby, L. and Mullins, G. (2001),"Strengthening steel bridge sections using CFRP laminates", Composites Part B: Engineering, 32, 309-322. https://doi.org/10.1016/S1359-8368(01)00006-3
  11. Shaat, A., Schnerch, D., Fam, A. and Rizkalla, S. (2004),"Retrofit of steel structures using fiber-reinforced polymers (FRP): State-of-the-art", Transportation Research Board (TRB) Annual Meeting, Washington, D.C., USA, CD-ROM (04-4063).
  12. Shaat, A. and Fam, A. (2006),"Axial loading tests on short and long hollow structural steel columns retrofitted using carbon fibre reinforced polymers", Canadian J. Civ. Eng., 33, 458-470. https://doi.org/10.1139/l05-042
  13. Shaat, A. and Fam, A. (2007),"Fiber-element model for slender HSS columns retrofitted with bonded high modulus composites", J. Struct. Eng., ASCE, 133(1), 85-95. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:1(85)
  14. Weng, C. C. (1984),"Cold-bending of thick steel plates at low R/t ratios", Master's thesis. Cornell University, at Ithaca, N.Y.
  15. Weng, C. C. and Pekoz, T. (1990),"Residual stresses in cold-formed steel members", J. Struct. Eng., ASCE, 116(6), 1611-1625. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:6(1611)

피인용 문헌

  1. Behavior of tee-section bracing members retrofitted with CFRP strips subjected to axial compression vol.42, pp.4, 2011, https://doi.org/10.1016/j.compositesb.2011.01.016
  2. Experimental and numerical investigation of the behaviour of CFRP strengthened CHS beams subjected to bending vol.113, 2016, https://doi.org/10.1016/j.engstruct.2016.01.047
  3. Enhancing Ultimate Compressive Strength of Notch Embedded Steel Cylinders Using Overwrap CFRP Patch vol.19, pp.3-4, 2012, https://doi.org/10.1007/s10443-011-9240-9
  4. Numerical studies on CFRP strengthened steel circular members under marine environment vol.49, pp.10, 2016, https://doi.org/10.1617/s11527-015-0781-5
  5. Finite element modelling of CFRP jacketed CFST members under flexural loading vol.49, pp.12, 2011, https://doi.org/10.1016/j.tws.2011.07.008
  6. Numerical investigation of FRP-strengthened tubular T-joints under axial compressive loads vol.100, 2013, https://doi.org/10.1016/j.compstruct.2012.12.020
  7. Experimental investigation of FRP-strengthened tubular T-joints under axial compressive loads vol.53, 2014, https://doi.org/10.1016/j.conbuildmat.2013.11.097
  8. Analysis of CFRP externally-reinforced steel CHS tubular beams vol.92, pp.12, 2010, https://doi.org/10.1016/j.compstruct.2010.05.012
  9. On the use of the EC3 and AISI specifications to estimate the ultimate load of CFRP-strengthened cold-formed steel lipped channel columns vol.47, pp.10, 2009, https://doi.org/10.1016/j.tws.2008.10.013
  10. Slender Steel Columns Strengthened Using High-Modulus CFRP Plates for Buckling Control vol.13, pp.1, 2009, https://doi.org/10.1061/(ASCE)1090-0268(2009)13:1(2)
  11. Numerical studies on CFRP strengthened steel columns under transverse impact vol.120, 2015, https://doi.org/10.1016/j.compstruct.2014.10.022
  12. Strengthening of Hollow Square Sections under Compression Using FRP Composites vol.2014, 2014, https://doi.org/10.1155/2014/396597
  13. Non-linear behaviour and load-carrying capacity of CFRP-strengthened lipped channel steel columns vol.30, pp.10, 2008, https://doi.org/10.1016/j.engstruct.2008.02.010
  14. CFRP-Strengthened HSS Columns Subject to Eccentric Loading vol.22, pp.4, 2018, https://doi.org/10.1061/(ASCE)CC.1943-5614.0000861
  15. Experimental study on repair of corroded steel beam using CFRP vol.9, pp.2, 2007, https://doi.org/10.12989/scs.2009.9.2.103
  16. Parametric study on bearing capacity of CFST members considering the concrete horizontal casting effect vol.13, pp.3, 2012, https://doi.org/10.12989/scs.2012.13.3.259
  17. Mechanical behavior of FRP confined steel tubular columns under impact vol.27, pp.6, 2007, https://doi.org/10.12989/scs.2018.27.6.691