Steel and Composite Structures

  • 제23권1호
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  • Pages.87-94
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  • 2017
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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CFRP strengthening of steel columns subjected to eccentric compression loading

  • Keykha, Amir Hamzeh (Department of Civil Engineering, Zahedan Branch, Islamic Azad University)
  • 투고 : 2016.07.15
  • 심사 : 2016.12.14
  • 발행 : 2017.01.20
⟨ 이전 논문 다음 논문 ⟩

초록

Steel structures often require strengthening due to the increasing life loads, or repair caused by corrosion or fatigue cracking. Carbon Fiber Reinforced Polymers (CFRP) is one of the materials used to strengthen steel structures. Most studies on strengthening steel structures have been carried out on steel beams and steel columns under centric compression load. No independent article, to the author's knowledge, has studied the effect of CFRP strengthening on steel columns under eccentric compression load, and it seems that there is a lack of understanding on behavior of CFRP strengthening on steel columns under eccentric compression load. However, this study explored the use of adhesively bonded CFRP flexible sheets on retrofitting square hollow section (SHS) steel columns under the eccentric compression load, using numerical investigations. Finite Element Method (FEM) was employed for modeling. To determine ultimate load of SHS steel columns, eight specimens with two types of section (Type A and B), strengthened using CFRP sheets, were analyzed under different coverage lengths, the number of layers, and the location of CFRP composites. Two specimens were analyzed without strengthening (control) to determine the increasing rate of the ultimate load in strengthened steel columns. ANSYS was used to analyze the SHS steel columns. The results showed that the CFRP composite had no similar effect on the slender and stocky SHS steel columns. The results also showed that the coverage length, the number of layers, and the location of CFRP composites were effective in increasing the ultimate load of the SHS steel columns.

키워드

참고문헌

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  2. Numerical investigation on the behavior of SHS steel frames strengthened using CFRP vol.24, pp.5, 2017, https://doi.org/10.12989/scs.2017.24.5.561
  3. Numerical investigation of continuous hollow steel beam strengthened using CFRP vol.66, pp.4, 2017, https://doi.org/10.12989/sem.2018.66.4.439
  4. Carbon-fibre strengthening of deficient hollow steel sections under combined loading vol.172, pp.8, 2019, https://doi.org/10.1680/jstbu.17.00150
  5. Behavior of Defective Curved Steel Beams Strengthened by a CFRP Composite vol.55, pp.4, 2017, https://doi.org/10.1007/s11029-019-09831-y
  6. Assessment of Structural Behavior of Vertical Curved Hollow Steel Beams Strengthened Using CFRP Composite vol.24, pp.4, 2017, https://doi.org/10.1061/(asce)sc.1943-5576.0000440
  7. Experimental investigation on the compressive strength of PFGP-covered concretes exposed to high temperature vol.10, pp.4, 2017, https://doi.org/10.1108/jsfe-11-2018-0033
  8. Burst capacity of pipe under corrosion defects and repaired with thermosetting liner vol.35, pp.2, 2020, https://doi.org/10.12989/scs.2020.35.2.171