Steel and Composite Structures

  • 제18권3호
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  • Pages.623-639
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  • 2015
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Axial behavior of RC columns strengthened with SCC filled square steel tubes

  • Lu, Yi-Yan (School of Civil Engineering, Wuhan University) ;
  • Liang, Hong-Jun (School of Civil Engineering, Wuhan University) ;
  • Li, Shan (School of Civil Engineering, Wuhan University) ;
  • Li, Na (School of Civil Engineering, Wuhan University)
  • 투고 : 2014.06.20
  • 심사 : 2014.09.03
  • 발행 : 2015.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Self-compacting Concrete (SCC) Filled Square steel Tubes (SCFST) was used to strengthen square RC columns. To establish the efficiency of this strengthening method, 17 columns were tested under axial compression loading including 3 RC columns without any strengthening (WRC), 1 RC column strengthened with concrete jacket (CRC), 13 RC columns strengthened with self-compacting concrete filled square steel tubes (SRC). The experimental results showed that the use of SCFST is interesting since the ductility and the bearing capacity of the RC columns are greatly improved. The improvement ratio is significantly affected by the nominal wall thickness of steel tubes (t), the strength grade of strengthening concrete (C), and the length-to-width ratio (L / B) of the specimens. In order to quantitatively analyze the effect of these test parameters on axial loading behavior of the SRC columns, three performance indices, enhancement ratio (ER), ductility index (DI), and confinement ratio (CR), were used. The strength of the SRC columns obtained from the experiments was then employed to verify the proposed mode referring to the relevant codes. It was found that codes DBJ13-51 could relatively predict the strength of the SRC columns accurately, and codes AIJ and BS5400 were relatively conservative.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation

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피인용 문헌

  1. Effect of the Outer Diameter on the Behavior of Square RC Columns Strengthened with Self-Compacting Concrete Filled Circular Steel Tube pp.2093-6311, 2018, https://doi.org/10.1007/s13296-018-0185-9
  2. Axial Behaviour of Slender RC Circular Columns Strengthened with Circular CFST Jackets vol.2018, pp.1687-8094, 2018, https://doi.org/10.1155/2018/7923575
  3. Experimental Study and Confinement Analysis on RC Stub Columns Strengthened with Circular CFST Under Axial Load pp.2093-6311, 2018, https://doi.org/10.1007/s13296-018-0054-6
  4. Behavior of steel-concrete jacketed corrosion-damaged RC columns subjected to eccentric load vol.29, pp.6, 2015, https://doi.org/10.12989/scs.2018.29.6.689