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CLC number: TU366.2; TU352.5

On-line Access: 2012-07-03

Received: 2012-01-18

Revision Accepted: 2012-04-11

Crosschecked: 2012-05-29

Cited: 3

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Journal of Zhejiang University SCIENCE A 2012 Vol.13 No.7 P.491-505

http://doi.org/10.1631/jzus.A1200022


A numerical study on fire endurance of wood beams exposed to three-side fire


Author(s):  Jin Zhang, Qing-feng Xu, Yi-xiang Xu, Bin Wang, Jing-xiang Shang

Affiliation(s):  Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China; more

Corresponding email(s):   zhangjin0622@139.com

Key Words:  Three-side fire, Fire endurance, Load level, Fire prevention measures, Finite element analysis, Density of wood


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Jin Zhang, Qing-feng Xu, Yi-xiang Xu, Bin Wang, Jing-xiang Shang. A numerical study on fire endurance of wood beams exposed to three-side fire[J]. Journal of Zhejiang University Science A, 2012, 13(7): 491-505.

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author="Jin Zhang, Qing-feng Xu, Yi-xiang Xu, Bin Wang, Jing-xiang Shang",
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volume="13",
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pages="491-505",
year="2012",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1200022"
}

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%A Jin Zhang
%A Qing-feng Xu
%A Yi-xiang Xu
%A Bin Wang
%A Jing-xiang Shang
%J Journal of Zhejiang University SCIENCE A
%V 13
%N 7
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%D 2012
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1200022

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T1 - A numerical study on fire endurance of wood beams exposed to three-side fire
A1 - Jin Zhang
A1 - Qing-feng Xu
A1 - Yi-xiang Xu
A1 - Bin Wang
A1 - Jing-xiang Shang
J0 - Journal of Zhejiang University Science A
VL - 13
IS - 7
SP - 491
EP - 505
%@ 1673-565X
Y1 - 2012
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1200022


Abstract: 
To investigate the fire endurance of wood beams exposed to three-side fire, we conducted bearing capacity tests of two wood beams and experiments of five wood beams exposed to three-side fire. The finite element software ANSYS was also used to predict the fire endurance of those beams with the indirect order coupling method. It was found that the fire endurance decreases as the load level increases, and the reduction ratio tends to decrease. In the case of a certain load level, the fire endurance is improved if the section size is increased or covered by the fire protection coating. The central deformation increases as the fire duration increases, and the ratio of increase tends to rise. On another note, an increase in the density of wood leads to a rise in the fire endurance of a given beam. From the finite element method (FEM) calculation results, the fire endurance decreases as the load level increases, and the reduction ratio tends to decrease. When the load level is greater than 0.5, the fire endurance is significantly reduced, and it does not change significantly when the load level changes. Lastly, for a load level magnitude below 0.5, the fire endurance and load level are proportional to one another.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1]Babrauskas, V., 2005. Charring rate of wood as a tool for fire investigations. Fire Safety Journal, 40(6):528-554.

[2]Chen, X.J., Yang, L.Z., Deng, Z.H., Fan, W.C., 2002. A mathematical model for pyrolysis of wood in fire environment. Journal of Combustion Science and Technology, 8(4):333-337 (in Chinese).

[3]EN 1991-1-2, 2003. Eurocode 1: Actions on Structures. Part 1-2: Actions on Structures Exposed to Fire. Brussels, Belgium.

[4]Firmanti, A., Subiyanto, B., Takino, S., Kawai, S., 2004. The critical stress in various stress levels of bending member on fire exposure for mechanical graded lumber. Journal of Wood Science, 50(5):385-390.

[5]Frangi, S.A., Bertocchi, M., Claub, S., Niemz, P., 2011. Mechanical behaviour of finger joints at elevated temperatures. Wood Science and Technology, in press.

[6]Giancaspro, J., Papakonstantinou, C., Balaguru, P., 2009. Mechanical behavior of fire-resistant biocomposite. Composites: Part B, 40(3):206-211.

[7]Hietaniemi, J., 2007. Probabilistic simulation of fire endurance of a wooden beam. Structural Safety, 29(4):322-336.

[8]Hugi, E., Weber, R., 2012. Fire behaviour of tropical and European wood and fire resistance of fire doors made of this wood. Fire Technology, 48(3):679-698.

[9]ISO 834 (International Standards Organization), 1990. ISO/CD 834-1, ISO/CD 834-2 and ISO/CD 834-3, Fire Resistance Tests-Elements of Building Construction, Parts 1, 2, and 3.

[10]Konig, J., 2005. Structural fire design according to Eurocode 5—design rules and their background. Fire and Materials, 29(3):147-163.

[11]Li, X.M., Li, S.X., Xu, Q.F., Xu, Q., Zhang, J., Mu, B.G., 2010. Experimental study on fire endurance of timber columns exposed to four-side fire. Building Structure, 40(3):115-117 (in Chinese).

[12]Lie, T.T., 1977. A method for assessing the fire resistance of laminated timber beams and columns. Canadian Journal of Civil Engineering, 4(2):161-169.

[13]Moss, P., Buchanan, A., Fragiacomo, M., Austruy, C., 2010. Experimental testing and analytical prediction of the behaviour of timber bolted connections subjected to fire. Fire Technology, 46(1):129-148.

[14]Njankouo, J.M., Detreppe, J.C., Franssen., J.M., 2005. Fire resistance of timbers from tropical countries and comparison of experimental charring rates with various models. Construction and Building Materials, 19(5):376-386.

[15]Park, J.S., Lee, J.J., 2004. Fire resistance of light-framed wood floors exposed to real and standard fire. Journal of Fire Sciences, 22(6):449-471.

[16]Park, J.S., Buchanan, A.H., Lee, J.J., 2006. Fire performance of laminated veneer lumber (LVL) with glued-in steel rod connections. Journal of Fire Sciences, 24(1):27-46.

[17]Peng, L., Hadjisophocleous, G., Mehaffey, J., Mohammad, M., 2010. Fire resistance performance of unprotected wood-wood-wood and wood-steel-wood connections: A literature review and new data correlations. Fire Safety Journal, 45(6-8):392-399.

[18]Pering, G.A., Springer, G.S., 1980. Decrease in tensile strength and in mass of burning wood. Fire Technology, 16(4):245-251.

[19]Richardson, L.R., Batista, M., 2001. Fire resistance of timber decking for heavy timber construction. Fire and Materials, 25(1):21-29.

[20]Ru, H.W., Liu, W.Q., Lu, W.D., Yang, H.F., 2011. Fire resistance experiment on bolted connections in glued laminated timber. Journal of Nanjing University of Technology, 33(5):70-74 (in Chinese).

[21]Van Zeeland, I.M., Salinas, J.J., Mehaffey, J.R., 2005. Compressive strength of lumber at high temperatures. Fire and Materials, 29(2):71-90.

[22]Xu, Q.F., Li, X.M., Mu, B.G., Zhang, J., Xu, M., Li, S.X., 2011a. Static experimental research on mechanical behavior of timber beams with lime putty finishing after fire. Journal of Building Structures, 32(7):73-79 (in Chinese).

[23]Xu, Q.F., Li, X.M., Zhang, J., Mu, B.G., Xu, Q., Li, S.X., 2011b. Experimental study of the mechanical behavior of timber beams exposed to three-side fire. China Civil Engineering Journal, 44(7):64-70 (in Chinese).

[24]Xu, Q.F., Li, X.M., Zhang, J., Mu, B.G., Xu, M., Li, S.X., 2012. Experimental study of the mechanical behavior of timber columns after exposure to fire on four sides. China Civil Engineering Journal, 45(3):79-85 (in Chinese).

[25]Yao, L.H., Wang, X.M., Fei, B.H., Zhao, R.J., 2007. Present status of fireproofing for wooden buildings. China Wood Industry, 21(5):29-31 (in Chinese).

[26]Ye, X.L., Shi, Y.J., 2003. Application Examples of Engineering Analysis Software—ANSYS. Tsinghua University Press, Beijing, China (in Chinese).

[27]Young, S., Clancy, P., 2001. Compression mechanical properties of wood at temperatures simulating fire conditions. Fire and Materials, 25(3):83-93.

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