Fire Experimental Study of Four-Edge Fixed Reinforced Concrete Slab in Fire

Abstract:

The performance of one full scale four- edge fixed reinforced concrete slab under the condition of combined effects of loading and fire was investigated. The specimens design, the test plan, the test contents and the test methods were firstly introduced. Through the experiments, the distribution of temperature field along the depth of the slab and the temperature changes of the inner steel were obtained, as well as the deformation of out-plane and in-plane and the rotation on the edges. The changing of reaction forces on the bearings of the slab with the temperature was also observed. The results indicated that, under the condition of fire, the out-plan deformation of the slab was much bigger than that of the normal temperature; non-linear temperature filed was existed along the depth of the slab; remarkable redistribution of the reaction forces were occurred on the fixed bearings. The fail pattern of the slab under the condition of combined effects of loading and fire was different from the static loading under normal temperature. The slab was suffered reverse forces because of the heat effects; hence the plastic hinge lines with the shape of elliptic basin were appeared on the top of the slab.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 1626-1637
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.1626
• Online since: December 2010
• Authors: Bin Wang, Yu Li Dong, Li Tang Gao
• Keywords: Deformation, Fail Pattern, Fire Experiment, Four-Edge Fixed Concrete Slab, Temperature Field

References

[1] Aimin Yuan, Baojun Sun, Yuli Dong etc. Experimental investigation of unbounded prestressed concrete simply-supported slab subjected to fire [J]. Industrial Construction 2005, 35(4): 38-42.

[2] Litang Gao, Ligang CHen, Xiaodong Li, Yuli Dong. Analysis of the behaviors of unbounded prestressed concrete continuous slabs under fire [J]. CONCRETE, 2006, 9(4): 80-83.

[3] Bin Wang, Yuli Dong. Experimental research of four-edge simple support two-way reinforced concrete slab under fire [J]. Journal of Building Structures, 2009. 12, 30(6): 23-33.

[4] Lim Linus, Wade Colleen. Experimental Fire Tests of Two-Way Concrete Slabs, Fire Engineering Research Report 02/12[M]. BRANZ Limited.

[5] C.G. Bailey, W. S Toh. Behaviour of concrete floor slabs at ambient and elevated temperatures [J]. Fire Safety Journal, 2007, 42(6-7): 425-436.

DOI: 10.1016/j.firesaf.2006.11.009

[6] S. J. Foster, C. G. Bailey, I. W. Burgess and R. J. Plank. Experimental behaviors of concrete floor slabs at large deformations [J]. Engineering Structures, 2004, 26(9): 1231-1247.

DOI: 10.1016/j.engstruct.2004.04.002

[7] Colin G. Bailey, Wee Siang. Toh. Small-scale concrete slab tests at ambient and elevated temperatures [J]. Engineering Structures, 2007, 29(10): 2775-2791.

DOI: 10.1016/j.engstruct.2007.01.023

[8] Yuli Dong. Fire safety design of concrete structure [M]. Beijing, Science publishing house, (2001).

[9] Ligang Chen, Yuli Dong, Xiaodong Li. The failure modes of the reinforced concrete three-span continuous slabs under fire. Journal of Harbin Institute of Technology. 2004, 36(10): 1358-1371.

[10] Bin Wang, Yuli Dong, Liang, Suo Zhinian Yang. Fire test design of four-edge fixed large full-scale two-way reinforced concrete slabs and there installation under extremely narrow space [J]. Industrial Construction, 2009, 39(10): 96-101.

[11] Zhenhai Guo, Xudong Shi. Behaviour of reinforced concrete at elevated temperature and it's calculation[M]. Beijing: Tsinghua University Press, (2003).