Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Behaviors of Long Square Hollow Section Columns Retrofitted using Carbon Fiber Reinforced Polymer Sheets(CFRP Sheets) Subjected to Concentrated Axial Loading

탄소섬유쉬트(CFRP Sheets)로 보강된 장주 각형강관기둥의 중심축하중거동

  • Park, Jai Woo (Dept. of Construction, Gayoon Construction, Co., Ltd.) ;
  • Choi, Sun Kyu (Sunyoung Architects & Engineering Consultants) ;
  • Yoo, Jung Han (School of Architecture, Seoul National University of Science & Technology)
  • 박재우 ((주) 가윤, 건축부) ;
  • 최선규 (선영구조기술사건축사사무소) ;
  • 유정한 (서울과학기술대학교 건축학부)
  • Received : 2013.02.18
  • Accepted : 2013.05.29
  • Published : 2013.06.27
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Abstract

This paper presents the experimental results of behacior of slender square hollow section columns strengthened with carbon fiber reinforced polymers (CFRP) sheets subjected to concentrated axial loading. Three long specimens were fabricated and one stub column were fabricated. The main parameters were the number of CFRP layers. From the tests, it was observed that global buckling were occurred at the center of specimen for unretrofitting slender column. However, CFRP retrofitting could prevent the global buckling of slender column. Maximum increase of 22% was also achieved in axial-load capacity with three longitudinal layered CFRP applied on four sides of steel tubes.

본 연구에서는 각형 중공강관(SHS) 장주기둥에 CFRP쉬트를 길이방향으로 보강하여 중심축하중 실험을 수행하였다. 총 3개의 장주실험체와 1개의 stub column 실험체를 제작하였으며, 실험변수는 CFRP 보강겹수이다. 실험결과 장주기둥에 대해 실험체 중간에서 전체좌굴이 발생하며 횡변위가 발생하여 파괴되었지만, CFRP쉬트의 보강을 통해 전체좌굴을 제어하며 횡변위로 인한 안정성을 확보하였다. 또한 CFRP쉬트의 보강으로 최대 22%의 내력이 상승하여 내력상승효과를 확인할 수 있었다.

Keywords

References

  1. Xiao, X.L. and Zhang, L. (2006) State-of-the art Review on FRP Strengthened Steel Structures, Engineering Structures, Vol. 29, pp.1808-1823.
  2. 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, Vol. 6, No. 6, pp.514-522. https://doi.org/10.1061/(ASCE)1084-0702(2001)6:6(514)
  3. Colombi, P. and Poggi, C. (2006) An experimental, Analytical and Numerical Study of the Static Behavior of Steel Beams Reinforced By Pultruded CFRP Strips, J. of Composites, Vol. 37, pp.64-73. https://doi.org/10.1016/j.compositesb.2005.03.002
  4. Narmashiri, K., Jumaat, M.Z., and Ramli Sulong, N.H. (2010) Shear Strengthening of Steel I-Beams by using CFRP strips, Scientific Research and Essays, Vol. 5, No. 16, pp.2155-2168.
  5. 박재우, 유정한, 최선규, 류재용, 최성모(2012) 세장판으로 구성된 각형강관 단주의 탄소섬유쉬트 보강, 한국강구조학회학술발표대회논문집, 한국강구조학회, pp. 81-82. Park, J.W., Yoo, J.H., Choi, S.K., Ryu, J.H., and Choi, S.M. (2012) Carbon Fiber Sheets Reinforcement of Square Steel Short Columns with Slender Plates, Conference Journal of Korean Society of Steel Construction, KSSC, pp.81-82 (in Korean).
  6. 박재우, 최선규, 최성모, 송동엽, 유정한(2012) 탄소섬유 쉬트(CFRP Sheets)로 보강된 세장한 각형강관기둥의 중심축하중실험, 한국강구조학회논문집, 한국강구조학회, 제24권, 제6호, pp.735-742. Park, J.W., Choi, S.K., Choi, S.M., Song, D.Y., and Yoo, J.H. (2012) Concentrated Axial Loading for Slender Square Hollow Section Reinforced by Carbon Fiber Reinforced Polymer Sheets(CFRP Sheets), Journal of Korean Society of Steel Construction, KSSC, Vol. 24, No. 6, pp.735-742 (in Korean). https://doi.org/10.7781/kjoss.2012.24.6.735
  7. 대한건축학회(2009) 건축구조설계기준 및 해설(KBC 2009), 기문당. AIK (2009) Korea building code and commentary - structural, Architectural Institute of Korea (in Korean).
  8. AISC (2010) Specification for Structural Steel Buildings, American Institute of Steel Construction, USA.
  9. Teng, J.G. (2007) Behavior of FRP-jacketed circular steel tubes and cylindrical shells under axial compression, Construction and Building Materials, Vol. 21, pp.827-838. https://doi.org/10.1016/j.conbuildmat.2006.06.016
  10. KS (2007) KS B 0801, 금속재료인장시험편. KS (2011) KS B 0801, Test pieces for tensile test for metallic materials (in Korean).
  11. ASTM (2008) ASTM D 3039, Standard test method for tensile properties of polymer matrix composites.

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