Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Numerical investigation on the behavior of SHS steel frames strengthened using CFRP

  • Keykha, Amir Hamzeh (Department of Civil Engineering, Zahedan Branch, Islamic Azad University)
  • Received : 2016.05.06
  • Accepted : 2017.05.12
  • Published : 2017.08.10
⟨ Previous Next ⟩

Abstract

Steel frames are widely used in steel structures. Exiting steel structures may be needed to strengthen for various reasons. Carbon Fiber Reinforced Polymers (CFRP) is one of the materials that are used to strengthen steel structures. Most studies on strengthening steel structures have been done on beams and steel columns. No independent study, to the researcher's knowledge, has studied the effect of CFRP strengthening on steel frames. This study explored the use of CFRP composite on retrofitting square hollow section (SHS) steel frames, using numerical investigations. Ten Finite Element (FE) models, which were strengthened with CFRP sheets, were analyzed under different coverage length, number of layers, and location of CFRP composite. One FE model without strengthening was analyzed as a control FE model to determine the increase of the ultimate load in the strengthened steel frames. ANSYS software was used to analyze the SHS steel frames. The results showed that the coverage length and the number of layers of CFRP composite have a significant effect on increasing the ultimate load of the SHS steel frames. The results also showed that the location of CFRP composite had no similar effect on increasing the ultimate load and the amount of mid span deflection of the SHS steel frames.

Keywords

References

  1. Abdollahi Chakand, N., Zamin Jumaat, M., Ramli Sulong, N.H., Zhao, X.L. and Mohammadizadeh, M.R. (2013), "Experimental and theoretical investigation torsional behaviour of CFRP strengthened square hollow steel section", Thin-Wall. Struct., 68, 135-140. https://doi.org/10.1016/j.tws.2013.03.008
  2. ACI Committee 440 (2002), Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures; ACI440.2R-02, American Institute, Farmington Hills, MI, USA.
  3. Al Zand, A.W., Badaruzzaman, W.H., Mutalib, A.A., Qahtan, A. H. (2015), "Finite element analysis of square CFST beam strengthened by CFRP composite material", Thin-Wall. Struct., 96, 348-358. https://doi.org/10.1016/j.tws.2015.08.019
  4. Al-Zubaidy, H., Al-Mahaidi, R. and Zhao, X.L. (2013), "Finite element modelling of CFRP/steel double strap joints subjected to dynamic tensile loadings", Compos. Struct., 99, 48-61. https://doi.org/10.1016/j.compstruct.2012.12.003
  5. Awaludin, A. and Sari, D.P. (2015), "Numerical and experimental study on repaired steel beam using carbon fiber reinforced polymer", Proceedings of IABSE-JSCE Joint Conference on Advances in Bridge Engineering-III, Dhaka, Bangladesh, August.
  6. Bambach, M.R., Jama, H.H. and Elchalakani, M. (2009), "Axial capacity and design of thin-walled steel SHS strengthened with CFRP", Thin-Wall. Struct., 47(10), 1112-1121. https://doi.org/10.1016/j.tws.2008.10.006
  7. Chen, T., Qi, M., Gu, X.L. and Yu, Q.Q. (2015), "Flexural strength of carbon fiber reinforced polymer repaired cracked rectangular hollow section steel beams", Int. J. Polym. Sci. DOI: http://dx.doi.org/10.1155/2015/204861
  8. Deng, J., Lee, M.M. and Moy, S.S. (2004), "Stress analysis of steel beams reinforced with a bonded CFRP plate", Compos. Struct., 65(2), 205-215. https://doi.org/10.1016/j.compstruct.2003.10.017
  9. Feng, P., Zhang, Y., Bai, Y. and Ye, L. (2013), "Strengthening of steel members in compression by mortar-filled FRP tubes", Thin-Wall. Struct., 64, 1-12. https://doi.org/10.1016/j.tws.2012.11.001
  10. Fanggi, B.A.L. and Ozbakkaloglu, T. (2015), "Square FRP-HSC-steel composite columns: Behavior under axial compression", Eng. Struct., 92, 156-171. https://doi.org/10.1016/j.engstruct.2015.03.005
  11. Haedir, J. and Zhao, X.L. (2011), "Design of short CFRPreinforced steel tubular columns", J. Constr. Steel Res., 67(3), 497-509. https://doi.org/10.1016/j.jcsr.2010.09.005
  12. Islam, S.Z. and Young, B. (2013), "Strengthening of ferritic stainless steel tubular structural members using FRP subjected to Two-Flange-Loading", Thin-Wall. Struct., 62, 179-190. https://doi.org/10.1016/j.tws.2012.09.001
  13. Keykha, A.H. (2017), "CFRP strengthening of steel columns subjected to eccentric compression loading", Steel Compos. Struct., Int. J., 23(1), 87-94. https://doi.org/10.12989/scs.2017.23.1.087
  14. Keykha, A.H., Nekooei, M. and Rahgozar, R. (2015), "Experimental and theoretical analysis of hollow steel columns strengthening by CFRP", Civil Eng. Dimens., 17(2), 101-107.
  15. Keykha, A.H., Nekooei, M. and Rahgozar, R. (2016a), "Analysis and strengthening of SHS steel columns using CFRP composite materials", Compos. Mech. Computat. Appl., Int. J., 7(4), 275-290. https://doi.org/10.1615/CompMechComputApplIntJ.v7.i4.20
  16. Keykha, A.H., Nekooei, M. and Rahgozar, R. (2016b), "Numerical and experimental investigation of hollow steel columns strengthened with carbon fiber reinforced polymer", J. Struct. Construct. Eng., 3(1), 49-58.
  17. Kim, Y.J. and Harries, K.A. (2011), "Behavior of tee-section bracing members retrofitted with CFRP strips subjected to axial compression", Compos. Part B: Eng., 42(4), 789-800. https://doi.org/10.1016/j.compositesb.2011.01.016
  18. Linghoff, D. Haghani, R. and Al-Emrani, M. (2009), "Carbonfibre composites for strengthening steel structures", Thin-Wall. Struct., 47(10), 1048-1058. https://doi.org/10.1016/j.tws.2008.10.019
  19. Photiou, N.K., Hollaway, L.C. and Chryssanthopoulos, M.K. (2006), "Strengthening of an artificially degraded steel beam utilising a carbon/glass composite system", Constr. Build. Mater., 20(1), 11-21. https://doi.org/10.1016/j.conbuildmat.2005.06.043
  20. Sundarraja, M.C. and Prabhu, G.G. (2011), "Finite element modelling of CFRP jacketed CFST members under flexural loading", Thin-Wall. Struct., 49(12), 1483-1491. https://doi.org/10.1016/j.tws.2011.07.008
  21. Teng, J.G. and Hu, Y.M. (2007), "Behaviour of FRP-jacketed circular steel tubes and cylindrical shells under axial compression", Constr. Build. Mater., 21(4), 827-838. https://doi.org/10.1016/j.conbuildmat.2006.06.016
  22. Xie, T. and Ozbakkaloglu, T. (2015), "Behavior of steel fiberreinforced high-strength concrete-filled FRP tube columns under axial compression", Eng. Struct., 90, 158-171. https://doi.org/10.1016/j.engstruct.2015.02.020
  23. Youssef, M.A. (2006), "Analytical prediction of the linear and nonlinear behaviour of steel beams rehabilitated using FRP sheets", Eng. Struct., 28(6), 903-911. https://doi.org/10.1016/j.engstruct.2005.10.018

Cited by

  1. Carbon-fibre strengthening of deficient hollow steel sections under combined loading vol.172, pp.8, 2019, https://doi.org/10.1680/jstbu.17.00150