Steel and Composite Structures

  • 제13권6호
  • /
  • Pages.521-537
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  • 2012
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Performance of fire damaged steel reinforced high strength concrete (SRHSC) columns

  • Choi, Eun Gyu (Department of Architectural Engineering, Ewha Womans University) ;
  • Kim, Hee Sun (Department of Architectural Engineering, Ewha Womans University) ;
  • Shin, Yeong Soo (Department of Architectural Engineering, Ewha Womans University)
  • 투고 : 2010.11.19
  • 심사 : 2012.09.24
  • 발행 : 2012.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, an experimental study is performed to understand the effect of spalling on the structural behavior of fire damaged steel reinforced high strength concrete (SRHSC) columns, and the test results of temperature distributions and the displacements at elevated temperature are analyzed. Toward this goal, three long columns are tested to investigate the effect of various test parameters on structural behavior during the fire, and twelve short columns are tested to investigate residual strength and stiffness after the fire. The test parameters are mixture ratios of polypropylene fiber (0 and 0.1 vol.%), magnitudes of applied loads (concentric loads and eccentric loads), and the time period of exposure to fire (0, 30, 60 and 90 minutes). The experimental results show that there is significant effect of loading on the structural behaviors of columns under fire. The loaded concrete columns result more explosive spalling than the unloaded columns under fire. In particular, eccentrically loaded columns are severely spalled. The temperature distributions of the concrete are not affected by the loading state if there is no spalling. However, the loading state affects the temperature distributions when there is spalling occurred. In addition, it is found that polypropylene fiber prevents spalling of both loaded and unloaded columns under fire. From these experimental findings, an equation of predicting residual load capacity of the fire damaged column is proposed.

키워드

과제정보

연구 과제 주관 기관 : Korea Science & Engineering Foundation

참고문헌

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피인용 문헌

  1. Experimental research on the fire performance of a special cross-shaped composite column with a high-strength concrete-filled steel tubular core 2018, https://doi.org/10.1177/1369433217753426
  2. Seismic performances of centrifugally-formed hollow-core precast columns with multi-interlocking spirals vol.20, pp.6, 2016, https://doi.org/10.12989/scs.2016.20.6.1259
  3. Scattering analysis of curved FSS using Floquet harmonics and asymptotic waveform evaluation technique vol.17, pp.5, 2014, https://doi.org/10.12989/scs.2014.17.5.561
  4. Depth-dependent evaluation of residual material properties of fire-damaged concrete vol.20, pp.4, 2017, https://doi.org/10.12989/cac.2017.20.4.503
  5. Residual strength capacity of fire-exposed circular concrete-filled steel tube stub columns vol.6, pp.5, 2012, https://doi.org/10.12989/acc.2018.6.5.485
  6. Compressive and flexural behaviors of ultra-high strength concrete encased steel members vol.33, pp.6, 2012, https://doi.org/10.12989/scs.2019.33.6.849
  7. Behaviour of ultra-high strength concrete encased steel columns subject to ISO-834 fire vol.38, pp.2, 2021, https://doi.org/10.12989/scs.2021.38.2.121