International Journal of Applied Science and Engineering
Published by Chaoyang University of Technology

J. H. Hsu1,2* and C. S. Lin2

Department of Civil Engineering, Ching Yun University, Jung-Li 320, Taiwan 
2 Department of Mechanical Engineering, Yuan Ze University, Jung-Li 320, Taiwan


 

Download Citation: |
Download PDF


ABSTRACT


This work combines thermal and structural analyses to assessing the residual bearing capabilities, flexural and shear capacities of reinforced concrete beams after fire exposure. The thermal analysis uses the finite difference method to model the temperature distribution of a reinforced concrete beam maintained at high temperature. The structural analysis, using the lumped method, is utilized to calculate the residual bearing capabilities, flexural and shear capacities of reinforced concrete beams after fire exposure. The results of the thermal analysis are compared to the experimental results in the literature, and the analytically derived structural results are also compared with full-scale reinforced concrete beams in previous fire exposure experiments. The comparison results indicated that the calculation procedure in this study assessed the residual bearing capabilities of reinforced concrete beams exposed to fire with sufficient accuracy. As no two fires are the same, this novel scheme for predicting residual bearing capabilities of fire-exposed reinforced concrete beams is very promising in that is eliminates the extensive testing otherwise required when determining fire ratings for structural assemblies.


Keywords: Residual, bearing capabilities, fire-exposed, RC beams


Share this article with your colleagues

 


REFERENCES


[1] Gruz, C. R. 1966. Elastic Properties of Concrete at High Temperature. Journal of the PCA Research and Development Laboratories, 8, 1: 37-45.

[2] Smith, E. E., and Harmathy, T.Z. 1979. “Design of Building for Fire Safety”, American Society for Testing and Materials, Philadelphia.

[3] Carman, A. D. and Nelson, R. A. 1921. “The thermal conductivity and diffusivity of concrete”. Bulletin No. 122: 32, Engineering Experimential Station, University of Illinois, Urbana. 

[4] Uddin, T. and Culver, C. G. 1975. Effect of Elevated Temperature on Structure Members Journal of structural Div. ASCE, 101: 1531-1549.

[5] ACI Committee 216. 1981. Guide for determining the fire endurance of concrete elements. ACI 216-81. Concrete International, 3: 13-47.

[6] Kong, F. K., Evans, R. H., Cohen, E., and Rall, F. 1983. “Handbook of Structural Concrete”, McGraw-Hill, New York.

[7] Hsu, J. H., Lin, C. S., and Hung, C. B. 2006. Modeling the Effective Elastic Modulus of RC Beams Exposed to Fire. Journal of Marine Science and Technology, 14, 2 :1-7.

[8] Lin, T. D. 1985. Measured Temperature in Concrete Beams Exposed to ASTM E 119 Standard Fire. “Research and Development Report”, Portland Cement Association, Skokie.

[9] Moetaz, M. E., Ahmed, M. R., and Shadia, E. 1996. Effect of Fire on Flexural Behavior of RC Beams. Construction and Building Materials, 10, 2:147-150.

[10] Lin, I. J., Chen, S. T., and Lin, C. J. 1999. The Shear Strength of Reinforcing Concrete Beam after Fire Damage. “Structure Safety Evaluation after Fire Damage”, Scientific & Technical Publishing Co., Ltd., Taiwan, 117-136.

[11] ACI 318R-02. 2002. “Building Code Requirements for Structural Concrete and Commentary”, American Concrete Institute, Michigan.

[12] Buchanan, A. H. 2000. “Structure Design for Fire Safety”. JOHN WILEY & SONS, LTD.

[13] Çengel, Y. H. 1998. “Heat Transfer: a practical approach”, (International Edition), McGraw-Hill, 57-111

[14] Eurocode 3. Design of Steel Structures. ENV 1993-1-2, 1995. General Rules – Structural Fire Design. “European Committee for Standardization”, Brussels, Belgium.

[15] Abrams, M. S. 1968. Compressive Strength of Concrete at Temperature to 1600°F . “Temperature and Concrete”, ACI Publication SP25, 33-58.

[16] ASTM E05.11 Task Group. 1982. “Repeatability and reproducibility of Results of ASTM E 119 Fire Test”, Research Report No. RR: E5-1003, ASTM, Philadelphia.

[17] Lie, T. T. 1995. Fire Temperature-Time “SFPE Handbook of Fire Protection Engineering”, Second Edition.  Society of Fire Protection Engineers, USA.


ARTICLE INFORMATION




Accepted: 2006-08-29
Available Online: 2006-09-01


Cite this article:

Hsu, J.-H., Lin, C.-S. 2006. Residual bearing capabilities of Fire-Exposed reinforced concrete beams. International Journal of Applied Science and Engineering, 4, 151–163. https://doi.org/10.6703/IJASE.2006.4(2).151


We use cookies on this website to improve your user experience. By using this site you agree to its use of cookies.