Vol. 10, No. 3, pp. 310-324 (2014)
A NUMERICAL STUDY ON THE EFFECT OF CONCRETE INFILL AND
INTUMESCENT COATING TO FIRE-RESISTANT BEHAVIOUR OF
STUB ELLIPTICAL STEEL HOLLOW SECTIONS UNDER AXIAL COMPRESSION
X.H. Dai 1 and D. Lam 2, *
1 Lecturer, School of Engineering Design and Technology,
University of Bradford, Bradford, BD7 1DP, UK
2 Professor, School of Engineering Design and Technology,
University of Bradford, Bradford, BD7 1DP, UK
*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 24 March 2013; Revised: 3 July 2013; Accepted: 24 September 2013
DOI:10.18057/IJASC.2014.10.3.4
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ABSTRACT
This paper presents a numerical study on the effect of concrete infill and intumescent coating to the fire resistant behaviour of stub elliptical concrete filled steel tubular (CFST) columns under standard fire. The selected elliptical steel hollow sections in this research cover the common used elliptical sections in current construction market; from 200X100 mm to 500X250 mm with wall thicknesses varying from 5 to 12.5 mm. Temperature distribution, critical temperature and fire exposing time of selected stub elliptical columns with concrete infill and other intumescent coating fire protection options under axial compression were extracted from numerical simulations using commercial FE package ABAQUS. Based on the comparison and analysis of the obtained results, the effect of concrete core and external intumescent coating to the thermal and structural fire-resistant behaviour of stub elliptical columns are discussed. Simple formulae are proposed to assess the critical steel temperature and maximum axial compressive load of stub elliptical CFST columns in standard fire.
KEYWORDS
Elliptical hollow section, temperature development, critical temperature, fire exposing time, concrete infill, intumescent coating, numerical modelling
REFERENCES
[1] Tao, Z., Han, L.H., Uy, B. and Chen, X., “Post-fire Bond between the Steel Tube and Concrete in Concrete-filled Steel Tubular Columns”, Journal of Constructional Steel Research 2011, Vol. 67, No. 3, pp. 484-496.
[2] Han, L.H. and Lin, X.K., “Tests on Cyclic Behavior of Concrete-Filled Hollow Structural Steel Columns after Exposure to the ISO-834 Standard Fire”, ASCE Journal of Structural Engineering, 2004, Vol. 130, No. 11, pp. 1807-1819.
[3] Han, L.H., Lin, X.K. and Yang, Y.F., “Cyclic Performance of Concrete Filled Steel Tubular Columns after Exposure to Fire: Analysis and Simplified Model”, Advances in Structural Engineering, 2008, Vol. 11, No. 4, pp. 455-473.
[4] Huo, J., Huang, G. and Xiao, Y., “Effects of Sustained Axial Load and Cooling Phase on Post-fire Behaviour of Concrete-filled Steel Tubular Stub Columns”, Journal of Constructional Steel Research, 2009, Vol. 65, No. 8-9, pp. 1664-1676.
[5] Zha, X.X., “FE Analysis of Fire Resistance of Concrete Filled CHS Columns”, Journal of Constructional Steel Research, 2003, Vol. 59, No. 6, pp. 769–779.
[6] Hong, S. and Varma, A.H., “Analytical Modelling of the Standard Fire Behavior of Loaded CFT Columns”, Journal of Constructional Steel Research, 2009, Vol. 65, No. 1, pp. 54-69.
[7] Espinos, A., Romero, M.L. and Hospitaler, A., “Advanced Model for Predicting the Fire Response of Concrete Filled Tubular Columns”, Journal of Constructional Steel Research 2010, Vol. 66, No. 8-9, pp. 1030–1046.
[8] Espinos, A., Gardner, L., Romero, M.L. and Hospitaler, A., “Fire Behaviour of Concrete Filled Elliptical Steel Columns”, Thin-Walled Structures, 2011, Vol. 49, No. 2, pp. 239–255.
[9] Dai, X.H. and Lam, D., “Shape Effect on the Behaviour of Axially Loaded Concrete Filled Steel Tubular Stub Columns at Elevated Temperature” Journal of Constructional Steel Research, 2012, Vol. 73, No. 6, pp. 117-127.
[10] Corus Construction & Industrial, Fire Resistance of Steel-framed Building, 2006 Edition (online).
[11] Dai, X.H., Wang, Y.C. and Bailey, C.G., “Effects of Partial Fire Protection on Temperature Developments in Steel Joints Protected by Intumescent Coating”, Fire Safety Journal 2009, Vol. 44, pp. 376-86.
[12] Dai, X.H., Wang, Y.C. and Bailey, C.G., “A Simple Method to Predict Temperatures in Steel Joints with Partial Intumescent Coating Fire Protection”, Fire Technology Journal 2010, Vol. 46, pp. 19-35.
[13] BS EN 1994-1-2, Eurocode 4: Design of Composite Steel and Concrete Structures, Part 1-2: General Rules-Structural Fire Design, British Standards Institution, London, 2005.
[14] ISO 834, Fire Resistance Tests, Elements of Building Construction. International Organization for Standardization, Geneva 1975.
[15] BS EN 1993-1-2, Eurocode 3: Design of Steel Structures, Part 1.2: General Rules- Structural Fire Design, British Standards Institution, London 2005.
[16] BS EN 1991-1-2, Eurocode 1: Actions on Structures, Part 1-2: General Actions-Actions on Structures Exposed to Fire, British Standards Institution, London 2002.
[17] Ding, J. and Wang, Y.C., “Realistic Modelling of Thermal and Structural Behaviour of Unprotected Concrete Filled Tubular Columns in Fire”, Journal of Constructional Steel Research, 2008, Vol. 64, pp. 1086-1102.