Structural Engineering and Mechanics

  • 제32권5호
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  • Pages.635-648
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  • 2009
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Experimental study on fire performance of axially-restrained NSC and HSC columns

  • Wu, Bo (State Key Laboratory of Subtropical Building Science, South China University of Technology) ;
  • Li, Yi-Hai (State Key Laboratory of Subtropical Building Science, South China University of Technology)
  • 투고 : 2009.02.16
  • 심사 : 2009.06.17
  • 발행 : 2009.07.30
⟨ 이전 논문 다음 논문 ⟩

초록

This paper describes fire performance of eight axially restrained reinforced concrete (RC) columns under a combination of two different load ratios and two different axial restraint ratios. The eight RC columns were all concentrically loaded and subjected to ISO834 standard fire on all sides. Axial restraints were imposed at the top of the columns to simulate the restraining effect of the rest of the whole frame. The axial restraint was effective when the column was expanding as well as contracting. As the results of the experiments have shown, the stiffness of the axial restraint and load level play an important role in the fire behaviors of both HSC and NSC columns. It is found that (a) the maximum deformations during expanding phase were influenced mostly by load ratio and hardly by axial restraint ratio, (b) For a given load ratio, axial restraint ratio had a great impact on the development of axial deformation during contraction phase beyond the initial equilibrium state, (c) increasing the axial restraint increased the value of restraint force generated in both the NSC and HSC columns, and (d) the development of column axial force during the contracting and cooling phase followed nearly parallel trend for columns under the same load ratio.

키워드

참고문헌

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피인용 문헌

  1. An Experimental and Numerical Study on the Behavior of High Strength Concrete Columns in Fire Subjected to High Restraint vol.1, pp.1, 2010, https://doi.org/10.1260/2040-2317.1.1.1
  2. Structural responses of reinforced concrete columns subjected to uniaxial bending and restraint at elevated temperatures vol.60, 2013, https://doi.org/10.1016/j.firesaf.2013.04.005
  3. Fracture behaviour of steel fibre reinforced recycled aggregate concrete after exposure to elevated temperatures vol.128, 2016, https://doi.org/10.1016/j.conbuildmat.2016.10.072
  4. Performance of HSC columns under severe cyclic loading vol.13, pp.2, 2015, https://doi.org/10.1007/s10518-014-9617-x
  5. Thermal-induced restraint forces in reinforced concrete columns subjected to eccentric loads vol.69, 2014, https://doi.org/10.1016/j.firesaf.2014.06.001
  6. Numerical analysis of lateral displacement of beam-column joints in concrete frame structures subjected to fire 2018, https://doi.org/10.1177/1369433217749767
  7. Fire Resistance of High Strength Concrete Columns Subjected to Moderate Axial Restraint vol.18, pp.1, 2009, https://doi.org/10.2190/af.18.1.d
  8. Lateral deformation behavior of eccentrically loaded slender RC columns with different levels of rotational end restraint at elevated temperatures vol.12, pp.1, 2009, https://doi.org/10.1108/jsfe-04-2020-0014