Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Finite Element Methods for HSS(Hollow Square Section) Steel Columns Strengthened with Carbon Fiber Reinforced Polymer Plastic(CFRP) Sheets

탄소섬유쉬트(CFRP Sheets)로 보강된 각형강관(HSS)기둥의 유한요소해석 연구

  • Park, Jai Woo (Dept, of Public Facilities Safety, Korea Infrastructure Safety & Technology Corporation) ;
  • Yoo, Jung Han (School of Architecture, Seoul National University of Science & Technology)
  • 박재우 (한국시설안전공단, 생활시설안전실) ;
  • 유정한 (서울과학기술대학교, 건축학부)
  • Received : 2015.02.09
  • Accepted : 2016.06.01
  • Published : 2016.06.27
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents the finite element method results for HSS(Hollow Square Section) steel columns strengthened with Carbon Fiber Reinforced Polymer Plastic(CFRP) sheets. 6 specimens were fabricated and the specimen groups were non-compact short columns, slender short columns, and non-compact long columns. Test parameter was the number of CFRP ply. The finite element analysis was performed by using ANSYS Workbench V.14.0 and the results of FEM were compared with those of Test for failure mode, load-displacement curve, maximum load, and initial stiffness. The comparisons between experimental observations and computed results show that the analyses provided good correlation to actual behavior. Finally, the buckling stress were calculated according to the AISC cold-formed structure provision and the retrofitting effect were verified for each section type.

본 연구에서는 탄소섬유쉬트로 보강된 각형강관 기둥의 유한요소 해석결과를 소개하고 있다. 실험체 개수는 총 6개이며, 각형강관에 대해서는 비조밀 단면 단주, 세장판 단면 단주, 비조밀 단면 장주로 구성되어 있다. 실험변수는 탄소섬유쉬트 보강겹수이다. AFRP 스트립과 강재사이의 부착거동과 부착응력-슬립관계를 규명하였다. 총 6개의 실험체에 대하여 ANSYS V.14.0을 사용하여 유한요소해석을 수행하였으며, 파괴모드, 하중-변위곡선, 최대내력, 초기강성에 대해 실험결과와 비교하였다. 끝으로, AISC cold-formed steel structures 기준에 근거하여 세장비에 따른 좌굴응력값을 산정하였으며, 각 단면타입에 대한 좌굴응력값 및 보강효과를 비교하였다.

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. 박재우, 최선규, 최성모, 송동엽, 유정한(2012) 탄소섬유쉬트(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 Test for Slender Square Hollow Section Retrofitted 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).
  3. 박재우, 최선규, 유정한(2013) 탄소섬유쉬트(CFRP Sheets)로 보강된 장주각형강관기둥의 중심축하중거동, 한국강구조학회논문집, 한국강구조학회, 제25권, 제3호, pp.299-305. Park, J.W., Choi, S.K., and Yoo, J.H. (2013). Behaviors of Long Square Hollow Section Columns Retrofitted using Carbon Fiber Reinforced Polymer Sheets(CFRP Sheets) Subjected to Concentrated Axial Loading oncentrated Axial Loading, Journal of Korean Society of Steel Construction, KSSC, Vol.25, No.3, pp.299-305(in Korean).
  4. 최성모, 박재우(2014) 섬유보강플라스틱(FRP) 스트립으로 보강한 철골보의 휨거동에 관한 실험적연구, 한국강구조학회논문집, 한국강구조학회, 제26권, 제2호, pp.69-79. Choi, S.M. and Park, J.W. (2014). Experimental Study of Flexural Behavior of Steel Beam Strengthened with the Fiber Reinforced Polymer Plastic(FRP) Strips, Journal of Korean Society of Steel Construction, KSSC, Vol.26, No.2, pp.69-79(in Korean).
  5. Park, J.W., Yeom, H.J., and Yoo, J.H. (2013). Axial Loading Tests and FEM Analysis of Slender Square Hollow Section (SHS) Stub Columns Strengthened with Carbon Fiber Reinforced Polymers, International Journal of Steel Structures, Vol.13, No.4, pp.731-743. https://doi.org/10.1007/s13296-013-4014-x
  6. 대한건축학회(2009) 건축구조설계기준 및 해설(KBC2009), 기문당. AIK (2009) Korean Building Code and Commentary, Architectural Institute of Korea(in Korean).
  7. Winter, G. (1947). Strength of Thin Steel Compression Flanges, Trans. ASCE., Vol.112.
  8. Yu, W.W. (1991). Cold-Formed Steel Designs, John Willy & Sons, New York.