복합신소재구조학회 논문집 (Journal of the Korean Society for Advanced Composite Structures)

  • 제2권1호
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  • Pages.23-29
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  • 2011
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  • 2093-5145(pISSN)
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  • 2288-0232(eISSN)
한국복합신소재구조학회 (Korean Society for Advanced Composite Structures)
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탄소섬유쉬트로 보강된 원형CFT기둥의 압축거동과 ACI 440 code를 응용한 압축내력예측식 제안

Axial Loading Behaviors and ACI 440 Code Applied Ultimate Axial Strength Formula of CFRP Strengthened Circular CFT Columns

  • 투고 : 2011.01.02
  • 심사 : 2011.03.02
  • 발행 : 2011.03.31
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초록

본 연구에서는 CFRP쉬트로 보강된 원형 CFT기둥의 압축거동을 관찰하고 설계식을 제안하였다. 원형 CFT기둥의 CFRP쉬트의 보강효과를 관찰하기 위해 10개의 실험체를 제작하여 중심축하중 실험을 수행하였다. 실험변수로는 CFRP쉬트 보강겹수와 직경-두께비(D/t)이다. 실험결과 원형CFT기둥에 CFRP쉬트 보강을 통해 압축내력을 증가시킨 것으로 나타났다. 끝으로 ACI 440code를 응용하여 CFRP 보강된 원형 CFT기둥의 압축내력을 예측하기 위한 설계식을 제안한다. 제안식을 분석한 결과 실험결과와 비교적 일치한 것으로 나타났다.

This study investigates the axial behavior of CFRP strengthened circular CFT columns and proposes the design formula of CFRP strengthened circular CFT columns. 10 specimens were prepared and axial loading test were conducted to investigate the retrofitting effects of CFRP composites on CFT columns. The main parameters are the number of FRP sheets and D/t ratio. Test results showed that the CFRP retrofitting enhanced the load bearing capacity of the circular CFT columns. Finally, A ACI 440 code applied ultimate axial strength formula is proposed to predict the ultimate strength of CFRP strengthened circular CFT columns. The proposed formula are good agreement with the test results.

키워드

참고문헌

  1. ACI 440R-96, (2002), Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures, ACI Committee 440, pp 27-28.2.
  2. A. Fam., S. Witt., S. Rizkally., (2006), Repair of damaged aluminum truss joints of highway overhead sign structures using FRP, Construction and Building Materials., Vol 20, pp 948-956. https://doi.org/10.1016/j.conbuildmat.2005.06.014
  3. A. Shaat., A. Fam.,., (2009), Slender steel columns strengthened using high-modulus CFRP plates for buckling control, J of composites for construction., Vol 13, No 1., pp. 1-12. https://doi.org/10.1061/(ASCE)1090-0268(2009)13:1(1)
  4. Gu. W., Guan. C. W., Zhao, Y. H., Cao., H. (2004), Experimental study on concentically-compressed circular concrete filled CFRP-steel composite tubular short columns, Journal of Shenyang Architectural and Civil Engineering University, Vol 20, No 2, pp. 118-120.
  5. J. W. Park., Y. K. Hong., S. M. Choi., (2010), Behavior of concrete filled square tubes confined by carbon fiber sheets(CFS) under compression and cyclic loads, Steel and Composite Structures, An Inter Journal., Vol 8, No 2.
  6. T. C. Miller et al., (2001), Strengthening of a steel bridge girder using CFRP plates, Journal of Bridge Engineering, ASCE, Vol.6, No.6, pp.514-522. https://doi.org/10.1061/(ASCE)1084-0702(2001)6:6(514)
  7. Y. Xiao., W. He., K. K. Choi.,(2007), Confined Concrete-Filled Tubular Columns, Journal of Structural Engineering, ASCE, Vol 131, No 3.
  8. Z. Tao., L. H. Han., L. L. Wang., (2006), Compressive and flexural behavior of CFRP-repaired concrete-filled steel tubes after exposure to fire, Journal of Constructional Steel Research., Vol 63, No 8.
  9. Z. Tao., L. H. Han., L. L. Wang., (2007), Axial loading behavior of CFRP strengthened concrete-filled steel tubular stub columns, JAdvances in structural engineering., Vol 10, No 1. pp. 37-46. https://doi.org/10.1260/136943307780150814

피인용 문헌

  1. Experimental Study of Seismic Performance Improvement of Pilotis RC Column Strengthened with FRP vol.10, pp.1, 2011, https://doi.org/10.11004/kosacs.2019.10.1.017
  2. Experimental Study of Seismic Performance Improvement of Pilotis RC Column Strengthened with FRP vol.10, pp.1, 2011, https://doi.org/10.11004/kosacs.2019.10.1.017