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http://dx.doi.org/10.12989/acc.2018.6.5.485

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)
Publication Information
Advances in concrete construction / v.6, no.5, 2018 , pp. 485-507 More about this Journal
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
circular CFST stub columns; post-fire residual strength; welded reinforcing bars; design specifications;
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1 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.   DOI
2 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.   DOI
3 Uy, B. (1998), "Local and post-buckling of concrete filled steel welded box columns", J. Constr. Steel. Res., 47(12), 47-72.   DOI
4 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.   DOI
5 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.   DOI
6 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.   DOI
7 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.   DOI
8 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.   DOI
9 Ziemian, R.D. (2010), Guide to Stability Design Criteria for Metal Structures, 6th Edition, Wiley.
10 Kodur, V.K.R. (1999), "Performance-based fire resistance design of concrete-filled steel columns", J. Constr. Steel. Res., 51(1), 21-6.   DOI
11 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.
12 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.   DOI
13 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.   DOI
14 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.   DOI
15 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.   DOI
16 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.   DOI
17 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.   DOI
18 Schneider, S.P. (1998), "Axially loaded concrete-filled steel tubes", J. Struct. Eng., 124(10), 1125-1138   DOI
19 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.   DOI
20 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.   DOI
21 Ekmekyapar, T. and AL-Eliwi, B.J.M. (2017), "Concrete filled double circular steel tube (CFDCST) stub columns", Eng. Struct., 135, 68-80.   DOI
22 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.
23 Ekmekyapar, T. (2016), "Experimental performance of concrete filled welded steel tube columns", J. Constr. Steel. Res., 117, 175-84.   DOI
24 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.   DOI
25 Han, L.H. (2001), "Performance-based fire resistance design of concrete-filled steel columns", J. Constr. Steel. Res., 57(6), 697-711.   DOI
26 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.   DOI
27 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.   DOI
28 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.   DOI
29 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.   DOI
30 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.
31 ASTM C39/C39M-14 (2014), Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens, ASTM International,West Conshohocken, PA 19428-2959, United States.
32 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.   DOI
33 AISC 360-10 (2010), Specification for Structural Steel Buildings, American Institute of Steel Construction, Chicago, USA
34 Alostaz, Y.M. and Schneider, S.P. (1996), "Connections to concrete-filled steel tubes", Department of Civil Engineering, University of Illinois, Urbana Champaign.
35 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.
36 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.   DOI
37 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.   DOI