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

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

  1. Ahmed, G. and Hurst, J.P. (1999), "Modeling pore pressure, moisture, and temperature in high strength concrete columns exposed to fire", Fire Technology, 35(3), 232-262. https://doi.org/10.1023/A:1015436510431
  2. Ali, F., Nadjai, A. and Choi, S. (2010), "Numerical and experimental investigation of the behavior of high strength concrete columns in fire", Eng. Struct., 32(5), 1236-1243. https://doi.org/10.1016/j.engstruct.2009.12.049
  3. Cheng, F.P., Kodur, V.K.R. and Wang, T.C. (2004), "Stress-strain curves for high strength concrete at elevated temperatures", Journal of Materials in Civil Engineering, 16(1), 84-90. https://doi.org/10.1061/(ASCE)0899-1561(2004)16:1(84)
  4. Choi, J.H., Kim, H.S. and Haj-ali, R. (2010), "Integrated fire dynamics and thermomechanical modeling framework for steel-concrete composite structures", Steel and Composite Structures, 10(2), 129-149. https://doi.org/10.12989/scs.2010.10.2.129
  5. Chowdhurya, E.U., Bisbya, L.A., Greena, M.F. and Kodur, V.K.R. (2007), "Investigation of insulated FRPwrapped reinforced concrete columns in fire", Fire Safety Journal, 42(6-7), 452-460. https://doi.org/10.1016/j.firesaf.2006.10.007
  6. Chung, K., Park, S. and Choi, S. (2009), "Fire resistance of concrete filled square steel tube columns subjected to eccentric axial load", International J. Steel Structures, 9(1), 69-76. https://doi.org/10.1007/BF03249481
  7. Eurocode 2. Design of concrete structures, Part 1-2: General rules-Structural fire design. BS EN 1992-1-2.
  8. Eurocode 3. Design of Steel Structures, Part 1-2: Fire Resistance. 1993-1-2 European pre-standard.
  9. Han, L.H. (2001), "Fire performance of concrete filled steel tubular beam-columns", J. Constr. Steel Res., 57(6), 695-709.
  10. Han, L.H., Huo, J.S. and Wang, Y.C. (2005), "Compressive and flexural behavior of concrete filled steel tubes after exposure to standard fire", J. Constr. Steel Res., 61(7), 882-901. https://doi.org/10.1016/j.jcsr.2004.12.005
  11. Han, L.H., Yang, Y.F., Yang, H. and Huo, J. (2002), "Residual strength of concrete-filled RHS columns after exposure to the ISO-834 standard fire", Thin Walled Structures, 40(12), 991-1012. https://doi.org/10.1016/S0263-8231(02)00044-7
  12. Harmathy, T.Z. (1993), "Fire Safety Deign and Concrete", Concrete Design and Construction Series, Longman Scientific & Technical, 32-37.
  13. Hirohata, M. and Kim, Y.C. (2008), "Generality verification for factors dominating mechanical behavior under compressive loads of steel structural members corrected by heating/pressing", Steel Struct., 8(2), 83-90.
  14. ISO 834-1 (1999), Fire resistance tests-elements of building constructions-Part 1: General requirements.
  15. Kalifa, P., Menneteau F.D. and Quenard, D. (2000), "Spalling and pore pressure in HPC at high temperatures", Cement and Concrete Research, 30(12), 1915-1927. https://doi.org/10.1016/S0008-8846(00)00384-7
  16. Kim, H.S. (2004), "Strength evaluation of fire damaged high strength concrete by nondestructive tests", M.S Thesis, Ewha Women's University, Seoul, Korea.
  17. Kodur, V.K.R., Cheng, F.P., Wang, T.C. and Sultan M.A. (2003), "Effect of Strength and Fiber Reinforcement on Fire Resistance of High-Strength Concrete Columns", J. Struct. Eng., 129(2), 253-259. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:2(253)
  18. Kodur, V.K.R., Wang, T.C. and Cheng, F.P. (2004), "Predicting the fire resistance behavior of high strength concrete columns", Cement and Concrete Composites, 26(2), 141-153. https://doi.org/10.1016/S0958-9465(03)00089-1
  19. Kodur, V.K.R. and Sultan, M.A. (2003), "Effect of temperature on thermal properties of high-strength concrete", J. Materials in Civil Engineering, 15(2), 101-107. https://doi.org/10.1061/(ASCE)0899-1561(2003)15:2(101)
  20. KS F 2403 (2010), Korean Industrial Standards. Korea Agency for Technology and Standards, Seoul, Korea.
  21. Nassif, A. (2006), "Postfire full stress-strain response of fire-damaged concrete", Fire and Materials, 30(5), 323-332. https://doi.org/10.1002/fam.911
  22. Shin, M.K. (2004), "Strength Evaluation of Fire-damaged High Strength Concrete", Master's Degree Thesis, Ewha Women's University, Seoul, Korea.
  23. Yu, J.T., Lu, Z.D. and Xie, Q. (2007), "Nonlinear analysis of SRC columns subjected to fire", Fire Safety J., 42(1), 1-10. https://doi.org/10.1016/j.firesaf.2006.06.006

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  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