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Residual strength capacity of fire-exposed circular concrete-filled steel tube stub columns

  • Alhatmey, Ihssan A. (Department of Civil Engineering, University of Gaziantep) ;
  • Ekmekyapar, Talha (Department of Civil Engineering, University of Gaziantep) ;
  • Alrebeh, Salih K. (Department of Civil Engineering, University of Gaziantep)
  • Received : 2018.07.12
  • Accepted : 2018.08.09
  • Published : 2018.10.25
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Abstract

Concrete-Filled Steel Tube (CFST) columns are an increasingly popular means to support great compressive loads in buildings. The residual strength capacity of CFST stub columns may be utilized to assess the potential damage caused by fire and calculate the structural fire protection for least post-fire repair. Ten specimens under room conditions and 10 specimens under fire exposure to the Eurocode smouldering slow-growth fire were tested to examine the effects of diameter to thickness D/t ratio and reinforcing bars on residual strength capacity, ductility and stiffness of CFST stub columns. On the other hand, in sixteen among the twenty specimens, three or six reinforcing bars were welded inside the steel tube. The longitudinal strains in the steel tube and load-displacement relationships were recorded throughout the subsequent compressive tests. Corresponding values of residual strength capacity calculated using AISC 360-10 and EC4 standards are presented for comparison purposes with the experimental results of this study. The test results showed that after exposure to $750^{\circ}C$, the residual strength capacity increased for all specimens, while the ductility and stiffness were slightly decreased. The comparison results showed that the predicted residual strength using EC4 were close to those obtained experimentally in this research.

Keywords

References

  1. Ada, M., Sevim, B., Yuzer, N. and Ayvaz, Y. (2018), "Assessment of damages on a RC building after a big fire", Adv. Concrete Constr., 6(2), 177-197. https://doi.org/10.12989/ACC.2018.6.2.177
  2. AISC 360-10 (2010), Specification for Structural Steel Buildings, American Institute of Steel Construction, Chicago, USA
  3. Alostaz, Y.M. and Schneider, S.P. (1996), "Connections to concrete-filled steel tubes", Department of Civil Engineering, University of Illinois, Urbana Champaign.
  4. ASTM C39/C39M-14 (2014), Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens, ASTM International,West Conshohocken, PA 19428-2959, United States.
  5. CEN. BS EN 13381-8:2010 (2010), Test Method for Determining the Contribution to the Structural Fire Resistance of Structural Members, Part 8: Applied Reactive Protection to Steel Members, Brussels, Belgium.
  6. Choi, E.G., Kim, H.S. and Shin, Y.S. (2012), "Performance of fire damaged steel reinforced high strength concrete (SRHSC) columns", Steel Compos. Struct., 13(6), 521-537. https://doi.org/10.12989/scs.2012.13.6.521
  7. Choi, S.M. and Park, J.W. (2013), "Structural behavior of CFRP strengthened concrete-filled steel tubes columns under axial compression loads", Steel Compos. Struct., 14(5), 453-472. https://doi.org/10.12989/scs.2013.14.5.453
  8. Ding, F.X., Yu, Z.W., Bai, Y. and Gong, Y.Z. (2011), "Elasto-plastic analysis of circular concrete-filled steel tube stub columns", J. Constr. Steel. Res., 67, 1567-1577. https://doi.org/10.1016/j.jcsr.2011.04.001
  9. EC4 (2004), Eurocode 4: Design of Composite Steel and Concrete Structures, Part 1-1: General Rules and Rules for Buildings, British Standards Institution, London, UK.
  10. Ekmekyapar, T. (2016), "Experimental performance of concrete filled welded steel tube columns", J. Constr. Steel. Res., 117, 175-84. https://doi.org/10.1016/j.jcsr.2015.10.013
  11. Ekmekyapar, T. and Al-Eliwi, B.J.M. (2016), "Experimental behavior of circular concrete filled steel tube columns and design specifications", Thin Wall. Struct., 105, 220-30. https://doi.org/10.1016/j.tws.2016.04.004
  12. Ekmekyapar, T. and AL-Eliwi, B.J.M. (2017), "Concrete filled double circular steel tube (CFDCST) stub columns", Eng. Struct., 135, 68-80. https://doi.org/10.1016/j.engstruct.2016.12.061
  13. Han, L.H. (2001), "Performance-based fire resistance design of concrete-filled steel columns", J. Constr. Steel. Res., 57(6), 697-711. https://doi.org/10.1016/S0143-974X(00)00030-4
  14. Han, L.H. and Huo, J.S. (2003), "Concrete filled hollow structural steel columns after exposure to ISO-834 standard fire", J. Struct. Eng., 129(1), 68. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:1(68)
  15. 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
  16. Han, L.H., Yang, Y.F., Yang, H. and Huo, J.S. (2002), "Residual strength of concrete-filled RHS columns after exposure to the ISO-834 standard fire", Thin Wall. Struct., 40(12), 991-1012. https://doi.org/10.1016/S0263-8231(02)00044-7
  17. Ibrahim, R.K.H., Hamid, R. and Taha, M.R. (2012), "Fire resistance of high-volume fly ash mortars with nanosilica addition", J. Constr. Build. Mater., 36, 779-786. https://doi.org/10.1016/j.conbuildmat.2012.05.028
  18. Kim, DK., Choi, SM. and Chung, K.S. (2000), "Structural characteristics of CFT columns subjected fire loading and axial force", Proceedings of the 6th ASCCS Conference, Los Angeles, USA.
  19. Kodur, V.K.R. (1999), "Performance-based fire resistance design of concrete-filled steel columns", J. Constr. Steel. Res., 51(1), 21-6. https://doi.org/10.1016/S0143-974X(99)00003-6
  20. Kodur, V.K.R. and Sultan, M.A. (2000), "Enhancing the fire resistance of steel columns through composite construction", Proceedings of the 6th ASCCS Conference, Los Angeles, CA.
  21. Lu, H., Zhao, X.L. and Han, L.H. (2009), "Fire behaviour of high strength self-consolidating concrete filled steel tubular stub columns", J. Constr. Steel. Res., 65, 1995-2010. https://doi.org/10.1016/j.jcsr.2009.06.013
  22. Oliveira, W.L.A.D., Nardin, S.D., Debs, A.L.H.D.C.E. and Debs, M.K.E. (2009), "Influence of concrete strength and length/diameter on the axial capacity of CFT columns", J. Constr. Steel. Res., 65, 2103-2110. https://doi.org/10.1016/j.jcsr.2009.07.004
  23. Park, S.H., Choi, S.M. and Chung, K.S. (2008), "A Study on the fire-resistance of concrete-filled steel square tube columns without fire protection under constant central axial loads", Steel Compos. Struct., 8(6), 491-510. https://doi.org/10.12989/scs.2008.8.6.491
  24. Rashad, A.M. and Zeedan, S.R. (2011), "The effect of activator concentration on the residual strength of alkali-activated fly ash pastes subjected to thermal load", J. Constr. Build. Mater., 25, 3098-3107. https://doi.org/10.1016/j.conbuildmat.2010.12.044
  25. Renaud, C., Aribert, J.M. and Zhao, B. (2003), "Advanced numerical model for the fire behavior of composite columns with hollow steel section", Steel Compos. Struct., 3(2), 75-95. https://doi.org/10.12989/scs.2003.3.2.075
  26. Rush, D., Bisby, L., Jowsey, A., Melandinos, A. and Lane, B. (2012), "Structural performance of unprotected concrete-filled steel hollow sections in fire", Steel Compos. Struct., 12(4), 325-352. https://doi.org/10.12989/scs.2012.12.4.325
  27. Schneider, S.P. (1998), "Axially loaded concrete-filled steel tubes", J. Struct. Eng., 124(10), 1125-1138 https://doi.org/10.1061/(ASCE)0733-9445(1998)124:10(1125)
  28. Shaikh, F.U.A. and Taweel, M. (2015), "Compressive strength and failure behaviour of fibre reinforced concrete at elevated temperatures", Adv. Concrete Constr., 3(4), 283-293. https://doi.org/10.12989/acc.2015.3.4.283
  29. Tao, Z., Uy, B., Han, L.H. and Wang, Z.B. (2009), "Analysis and design of concrete-filled stiffened thinwalled steel tubular columns under axial compression", Thin Wall. Struct., 47(12), 1544-56. https://doi.org/10.1016/j.tws.2009.05.006
  30. Tao, Z., Wang, Z.B., Han, L.H. and Uy, B. (2011), "fire performance of concrete-filled steel tubular columns strengthened by CFRP", Steel Compos. Struct., 11(4), 307-324. https://doi.org/10.12989/scs.2011.11.4.307
  31. Uy, B. (1998), "Local and post-buckling of concrete filled steel welded box columns", J. Constr. Steel. Res., 47(12), 47-72. https://doi.org/10.1016/S0143-974X(98)80102-8
  32. Yang, H., Han, L.H. and Wang, Y.C. (2008), "Effects of heating and loading histories on post-fire cooling behavior of concrete-filled steel tubular columns", J. Constr. Steel. Res., 64(5), 556-70. https://doi.org/10.1016/j.jcsr.2007.09.007
  33. Zaharia, R. and Dubina, D. (2014), "fire design of concrete encased columns: Validation of an advanced calculation model", Steel Compos. Struct., 17(6), 835-850. https://doi.org/10.12989/scs.2014.17.6.835
  34. Zhang, B., Cullen, M. and Kilpatrick, T. (2014), "Fracture toughness of high performance concrete subjected to elevated temperatures Part 1 The effects of heating temperatures and testing conditions (hot and cold)", Adv. Concrete Constr., 2(2), 145-162. https://doi.org/10.12989/acc.2014.2.2.145
  35. Zhang, B., Cullen, M. and Kilpatrick, T. (2016), "Spalling of heated high performance concrete due to thermal and hygric gradients", Adv. Concrete Constr., 4(1), 001-014. https://doi.org/10.12989/acc.2016.4.1.001
  36. Zhang, H.Y., Kodur, V., Qi, S.L., Cao, L. and Wu, B. (2014), "Development of metakaolin-fly ash based geopolymers for fire resistance applications", J. Constr. Build. Mater., 55, 38-45. https://doi.org/10.1016/j.conbuildmat.2014.01.040
  37. Ziemian, R.D. (2010), Guide to Stability Design Criteria for Metal Structures, 6th Edition, Wiley.

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