DOI QR코드

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Flexural and compression behavior for steel structures strengthened with Carbon Fiber Reinforced Polymers (CFRPs) sheet

  • Park, Jai-woo (Korea Infrastructure Safety Corporation) ;
  • Yoo, Jung-han (School of Architecture, Seoul National University of Science &Technology)
  • 투고 : 2014.09.11
  • 심사 : 2015.02.06
  • 발행 : 2015.08.25

초록

This paper presents the experimental results of flexural and compression steel members strengthened with carbon fiber reinforced polymers (CFRP) sheets. In the flexural test, the five specimens were fabricated and the test parameters were the number of CFRP ply and the ratio of partial-length bonded CFRP sheets of specimen. The CFRP sheet strengthened steel beam had failure mode: CFRP sheet rupture at the mid span of steel beams. A maximum increase of 11.3% was achieved depending on the number of CFRP sheet ply and the length of CFRP sheet. In the compression test, the nine specimens were fabricated and the main parameters were: width-thickness ratio (b/t), the number of CFRP ply, and the length of the specimen. From the tests, for short columns it was observed that two sides would typically buckle outward and the other two sides would buckle inward. Also, for long columns, overall buckling was observed. A maximum increase of 57% was achieved in axial-load capacity when 3 layers of CFRP were used to wrap HSS columns of b/t = 60 transversely.

키워드

참고문헌

  1. AISC (2010), Steel Construction Manual; Volume 2, (13th Ed.), American Institute of Steel Construction.
  2. Fam, A., Macfougall, C. and Shaat, A. (2009), "Upgrading steel-concrete composite girders and repair of damaged steel Beams using bonded CFRP laminates", Thin-Wall. Struct., 47(1), 1122-1135. https://doi.org/10.1016/j.tws.2008.10.014
  3. Harries, K.A., Peck, A.J. and Abraham, E.J. (2009), "Enhancing stability of structural steel sections using FRP", Thin-Wall. Struct., 47(1), 1092-1101. https://doi.org/10.1016/j.tws.2008.10.007
  4. Miller, T.C., Chajes, M.J., Mertz, D.R. and Hastings, J.N. (2001), "Strengthening of a steel bridge girder using CFRP plates", ASCE, J. Bridge. Eng., 6(6), 514-522. https://doi.org/10.1061/(ASCE)1084-0702(2001)6:6(514)
  5. Park, J.W. and Choi, S.M. (2013), "Structural behavior of CFRP strengthened concrete-filled steel tubes columns under axil compression loads", Steel Compos. Struct., Int. J., 14(5), 453-472. https://doi.org/10.12989/scs.2013.14.5.453
  6. Photiou, N.K., Hollaway, L.C. and Chrassanthopoulos, M.K. (2006), "Strengthening of an artificially damaged steel beam utilizing a carbon/glass composite system", J. Construct. Mater ., 20(1), 11-21. https://doi.org/10.1016/j.conbuildmat.2005.06.043
  7. Ritchie, P.A., Toamas, D.A., Lu, W. and Conneilly, G.M. (1991), "External reinforcement of concrete beams using fiber reinforced plastics", ACI Structural J., 490-500.
  8. 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), 472-483.
  9. Schnerch, D. and Rizkalla, S. (2008), "Flexural strengthening of steel bridges with high modulus CFRP strips", ASCE J. Bridge Eng., 13(2), 192-201. https://doi.org/10.1061/(ASCE)1084-0702(2008)13:2(192)
  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", Can. J. Civil Eng., 33(4), 458-470. https://doi.org/10.1139/l05-042
  11. Shatt, A. and Fam, A. (2008), "Repair of cracked steel girders connected to concrete slabs using carbon fiber reinforced polymer sheets", J. Compos. Construct.., 12(6), 650-659. https://doi.org/10.1061/(ASCE)1090-0268(2008)12:6(650)
  12. Shaat, A. and Fam, A.Z. (2009), "Slender steel columns strengthened using high-modulus CFRP plates for buckling control", ASCE, J. Compo. Const., 13(1), 1-12. https://doi.org/10.1061/(ASCE)1090-0268(2009)13:1(1)
  13. 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(3), 45-54.
  14. Zhao, X.L. and Zhang, L. (2007), "State of art review on FRP strengthened steel structures", Eng. Struct., 29(8), 1808-1823. https://doi.org/10.1016/j.engstruct.2006.10.006

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