Experimental Study on the Mechanical Properties of Reinforced Concrete Columns after Exposure to Fire

Abstract:

This paper provided three test data pertaining to the mechanical properties of reinforced concrete columns after exposure to ISO834 standard fire and three comparative test data pertaining to the mechanical properties of reinforced concrete columns at room temperature, mainly concerning the influence of fire on failure mode, distortion performance and ultimate load bearing capacity of reinforced concrete columns under axial and eccentric compression. Test results show that the failure mode of reinforced concrete columns after exposure to fire is basically same with that at room temperature. With the same concrete strength and heating condition, the bearing capacity of specimens reduces as the eccentricity increases. Strain along the section height of eccentric columns after fire basically agree with the plane section supposition while the flexural rigidity and ultimate load bearing capacity decreases obviously. The residual load bearing capacity of reinforced concrete columns after exposure to fire is only about 25% to 37% of that at room temperature.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 5122-5127
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.5122
• Online since: May 2011
• Authors: Jia Feng Xu, Ming Zhe Liu, Yue Feng Tang
• Keywords: After Exposure Fire, Column, Reinforced Concrete (RC), Residual Load Bearing Capacity

References

[1] D.E. Allen, T.T. Lie. Further studies of the fire resistance of reinforced concrete columns[J]. National research council Canada, 1974, 416(2): 1-11

[2] K.H. Tan, Y.Yao. Fire resistance of reinforced concrete columns subjected to 1-, 2-, and 3-face heating[J]. Journal of Structural Engineering, 2004, 11: 1820-1828

DOI: 10.1061/(asce)0733-9445(2004)130:11(1820)

[3] Lie T T, Rowe T J and Lin T D. Residual strength of fire-exposed reinforced concrete columns. Evaluation and Repair of Fire Damage to Concrete, ACI SP92-9, 1986: 153-174

[4] Xu Yu-ye, Wang Quan-feng. Research on residual strength of reinforced concrete columns after exposure to fire[J]. Engineering Mechanics, 2010, 27(2): 84-89 (in Chinese)

[5] Wu Bo, Ma Zhong-cheng, Ou Jin-ping.Study on the seismic performance of reinforced concrete compression-flexure members after fire[J]. Earthquake Engineering and Engineering Vibration, 1994, 14(4): 24-34(in Chinese)

[6] Ma Zhong-cheng, Wu Bo, Ou Jin-ping. Seismic characteristics of reinforced concrete columns after fire in all sides[J]. Chinese journal of computational mechanics, 1997, 14(4): 443-453(in Chinese)

[7] Wu Bo, Ma Zhong-cheng, Ou Jin-ping. Experimental study on seismic performance of reinforced concrete Columns after high temperature[J]. China civil engineering journal,1999, 32(2): 53-58(in Chinese)