International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
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Axial Loading Tests and FEM Analysis of Slender Square Hollow Section (SHS) Stub Columns Strengthened with Carbon Fiber Reinforced Polymers

  • Park, Jai-Woo (Engineering Division, Gayoon Construction Co., Ltd.) ;
  • Yeom, Hee-Jin (School of Architecture, Seoul National University of Science & Technology) ;
  • Yoo, Jung-Han (School of Architecture, Seoul National University of Science & Technology)
  • Received : 2012.08.24
  • Accepted : 2013.11.25
  • Published : 2013.12.31
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Abstract

This paper presents the experimental and analytical results of axially loaded stub columns of slender steel hollow square section (SHS) strengthened with carbon fiber reinforced polymers (CFRP) sheets. The total eight specimens were fabricated and the main parameters were: width-thickness ratio (b/t), the number of CFRP ply, and the CFRP sheet orientation. From the tests, it was observed that two sides would typically buckle outward and the other two sides would buckle inward. A maximum increase of 33% was achieved in axial-load capacity when 3 layers of CFRP were used to wrap HSS columns of b/t=100 transversely. Also, stiffness and was compared between un-retrofitted specimens and retrofitted specimens. To extend and better understand the experimental work, a companion analytical study (FEM study) was conducted. The comparisons between experimental observations and computed results show that the analyses provided good correlation to actual behavior.

Keywords

References

  1. AISC (2005). Steel construction manual. Vol 2, 13th ed., American Institute of Steel Construction.
  2. AISI Standard (2001). Supplement to the North American specification for the design of cold-formed steel structural members., American Iron and Steel Institute.
  3. El-Tawil, S., Ekiz, E., Goel, S., and Chao, S. H. (2011). "Restraining local and global buckling behavior of steel plastic hinges CFRP." J. Construct. Steel. Res., 67(1), pp. 261-269. https://doi.org/10.1016/j.jcsr.2010.11.007
  4. Fam, A., Macfougall, C., and Shaat, A. (2009). "Upgrading steel-concrete composite girders and repair of damaged steel Beams using bonded CFRP laminates" Thin-Walled Struct., 47(1), pp. 1122-1135. https://doi.org/10.1016/j.tws.2008.10.014
  5. Harries, K. A. Peck, A. J., and Abraham, E. J. (2009). "Enhancing stability of structural steel sections using FRP." Thin-Walled Struct., 47(1) , pp. 1092-1101. https://doi.org/10.1016/j.tws.2008.10.007
  6. Miller, T. C., Chajes, M. J., Mertz, D. R., and Hastings, J. N. (2001). "Strengthening of a steel bridge girder using CFRP plates." J. Bridge. Eng., ASCE, 6(6), pp. 514-522. https://doi.org/10.1061/(ASCE)1084-0702(2001)6:6(514)
  7. Narmashri, K., Jumaat, M. Z., and Ramil Sulong, N. H. (2010). "Shear strengthening of steel I-beams by using CFRP strips." Scientific Research and Essays., 5(16), pp. 2155-2168.
  8. Ritchie, P. A., Toamas, D. A., Lu, W., and Conneilly, G. M. (1991). "External reinforcement of concrete beams using fiber reinforced plastics." ACI Structural Journal, 88(4), pp. 490-500.
  9. Sallam, H. E. M., Badawy, A. A. M., Saba, A. M., and Mikhail, F. A. (2010). "Flexural behavior of strengthened steel-concrete composite beams by various plating methods." J. Const. Steel. Res., 62(1), pp. 472-483.
  10. Shaat, A. and Fam, A. Z. (2006). "Axial loading tests on short and long hollow structural steel columns retrofitted using carbon fibre reinforced polymers." Canadian Journal of Civil Eng., 33(4), pp. 458-470. https://doi.org/10.1139/l05-042
  11. Shaat, A. and Fam, A. Z. (2009). "Slender steel columns strengthened using high-modulus CFRP plates for buckling control." J. Compo. Const., ASCE, 13(1), pp. 1-12. https://doi.org/10.1061/(ASCE)1090-0268(2009)13:1(1)
  12. Swamy, E. N., Johns, E., and Charif, A. (1989). "The effect of external plate reinforcement on the strengthening of structurally damaged RC beams." The Structural Engineer, 67, pp. 45-54.
  13. Teng, J. G. and Hu, Y. M. (2007). "Behavior of FRP-jacked circular steel tubes and cylindrical shells under axial compression." Const. Build. Mater., 21(3), pp. 827-838. https://doi.org/10.1016/j.conbuildmat.2006.06.016
  14. Zhao, X. L. and Zhang, L. (2007). "State of art review on FRP strengthened steel structures." Engineering Structures, 29, pp. 1808-1823. https://doi.org/10.1016/j.engstruct.2006.10.006
  15. Tao., Z., Han, L. H., and Zhung, J. P. (2007). "Axial load behavior of cfrp strengthened concrete-filled steel tubular stub columns." Advances in Struct. Eng., 10(1), pp. 37-46 https://doi.org/10.1260/136943307780150814

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