Steel and Composite Structures

  • 제17권4호
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  • Pages.431-452
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  • 2014
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Mechanical behaviour of concrete filled double skin steel tubular stub columns confined by FRP under axial compression

  • Wang, Jun (College of Civil Engineering, Nanjing Tech University) ;
  • Liu, Weiqing (College of Civil Engineering, Nanjing Tech University) ;
  • Zhou, Ding (College of Civil Engineering, Nanjing Tech University) ;
  • Zhu, Lu (College of Civil Engineering, Nanjing Tech University) ;
  • Fang, Hai (College of Civil Engineering, Nanjing Tech University)
  • 투고 : 2012.07.16
  • 심사 : 2014.03.18
  • 발행 : 2014.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

The present study focuses on the mechanical behaviour of concrete filled double skin steel tubular (CFDST) stub columns confined by fiber reinforced polymer (FRP). A series of axial compression tests have been conducted on two CFDST stub columns, eight CFDST stub columns confined by FRP and a concrete-filled steel tubular (CFST) stub column confined by FRP, respectively. The influences of hollow section ratio, FRP wall thickness and fibre longitudinal-circumferential proportion on the load-strain curve and the concrete stress-strain curve for stub columns with annular section were discussed. The test results displayed that the FRP jacket can obviously enhance the carrying capacity of stub columns. Based on the test results, a new model which includes the effects of confinement factor, hollow section ratio and lateral confining pressure of the outer steel tube was proposed to calculate the compressive strength of confined concrete. Using the present concrete strength model, the formula to predict the carrying capacity of CFDST stub columns confined by FRP was derived. The theoretically predicted results agree well with those obtained from the experiments and FE analysis. The present method is also adapted to calculate the carrying capacity of CFST stub columns confined by FRP.

키워드

참고문헌

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피인용 문헌

  1. Experimental and Analytical Responses of Hollow and Concrete-Filled GFRP Tube Columns under Impact vol.21, pp.4, 2017, https://doi.org/10.1061/(ASCE)CC.1943-5614.0000793
  2. Ultimate Axial Strength of Concrete-Filled Double Skin Steel Tubular Column Sections vol.2019, pp.1687-8094, 2019, https://doi.org/10.1155/2019/6493037
  3. Mechanical behavior of FRP confined steel tubular columns under impact vol.27, pp.6, 2014, https://doi.org/10.12989/scs.2018.27.6.691
  4. Compressive test of GFRP-recycled aggregate concrete-steel tubular long columns vol.176, pp.None, 2014, https://doi.org/10.1016/j.conbuildmat.2018.05.068
  5. Numerical Study on Axial Behaviour of Concrete Filled Double Skin Steel Tubular (CFDST) Column with Cross Helical FRP Wrappings vol.396, pp.None, 2014, https://doi.org/10.1088/1757-899x/396/1/012008
  6. Behavior of steel-concrete jacketed corrosion-damaged RC columns subjected to eccentric load vol.29, pp.6, 2014, https://doi.org/10.12989/scs.2018.29.6.689
  7. Axial Behavior of Columns with Glass Fiber-Reinforced Polymer Composite Shells and Syntactic Foam Core vol.23, pp.2, 2014, https://doi.org/10.1061/(asce)cc.1943-5614.0000926
  8. Axial Compression Behaviour of Hybrid Double-Skin Tubular Columns Filled with Rubcrete vol.3, pp.2, 2014, https://doi.org/10.3390/jcs3020062
  9. Compressive behavior of concrete-filled double skin steel tubular short columns with the elliptical hollow section vol.38, pp.None, 2014, https://doi.org/10.1016/j.jobe.2021.102200