Computers and Concrete

Techno-Press (테크노프레스)
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Transient heat transfer analysis using Galerkin finite element method for reinforced concrete slab exposed to high elevated temperature

  • Han, Byung-Chan (Department of Architectural Engineering, Woosong College) ;
  • Kwon, Young-Jin (Department of Emergency Management Engineering, Hoseo University) ;
  • Lee, Byung-Jae (R&D Center, JNTINC Co. LTD.) ;
  • Kwon, Seung-Jun (Department of Civil and Environmental Engineering, Hannam University) ;
  • Chae, Young-Suk (Department of Architectural Engineering, Woosong University)
  • Received : 2014.11.09
  • Accepted : 2016.09.12
  • Published : 2016.12.25
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Abstract

Fire loading causes a critical collapse of RC (Reinforced Concrete) Structures since the embedded steels inside are relative week against high elevated temperature. Several numerical frameworks for fire resistance have been proposed, however they have limitations such as unstable convergence and long calculation period. In the work, 2-D nonlinear FE technique is proposed using Galerkin method for RC structures under fire loading. Closed-form element stiffness with a triangular element is adopted and verified with fire test on three RC slabs with different fire loading conditions. Several simulations are also performed considering fire loading conditions, water contents, and cover depth. The proposed numerical technique can handle time-dependent fire loading, convection, radiation, and material properties. The proposed technique can be improved through early-aged concrete behavior like moisture transport which varies with external temperature.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

References

  1. Cho, C.G., Han, B.C., Lee, J.H. and Kim, Y.Y. (2010), "Flexural test on composite deck slab produced with Extruded ECC Panel", J. Korea Concrete Inst., 22(5), 695-702. https://doi.org/10.4334/JKCI.2010.22.5.695
  2. Eurocode 2 (1996), Design of Concrete Structures Part 1, 2 General Rules-Structural Fire Design, DO ENV 1992.
  3. Han, B.C., Kwon, Y.J., Kim, J.H., Shin, Y.S. and Choi, E.G. (2007), "Temperature-dependency thermal properties and transient thermal analysis of structural frames exposed to fire", J. Korea Concrete Inst., 19(3), 283-292. https://doi.org/10.4334/JKCI.2007.19.3.283
  4. Harada, K. (1992), "A study on the prediction of temperature rise of concrete in fire-resistance Test", Ph.D Thesis, Kyoto University. Kyoto.
  5. Harmathy, T.Z. (1993), Fire Safety Design and Concrete, Longman Scientific and Technical, Longman House, Burnt Mill, Harlow, ESSEX CM20 2JE, UK..
  6. Kang, S.W. and Hong, S.G. (2001), "Material model and thermal response analysis of concrete at elevated temperatures", J. Korea Concrete Inst., 13(3), 268-276.
  7. Kodur, V. (2003), "World trade centre disaster-building performance investigation," CSCE workshop at Toronto, 1-18.
  8. Kodur, V.K.R. (1999), "Fire performance of high-strength concrete structural members", Construction Technology Update No. 31, Institute for Research in Construction, National Research Council of Canada, 1-20.
  9. Korean code, 334 (2008), Recommendation on the fire resistance of high-strength concrete beam and column, MOLIT-334, 3-6.
  10. Kwon, Y.J. (2011), Case study damaged by fire and repair methods for concrete building, Mag. Korea Concrete Inst., 23(3), 44-46. https://doi.org/10.22636/MKCI.2011.23.3.44
  11. Kwon, Y.J., Kim, N.H., Lee, J.Y., Kim, D.J. and Harada K. (2010), "Temperature dependency thermal properties of high strength concrete," Proceedings of Fire Science and Engineering in Japan Association, 282-283.
  12. Lee, C., Shin, Y.S., Lee, S.W. and Lee, C.E. (2005), "Numerical modeling of heat transfer in reinforced concrete columns exposed to fire", J. Korea Concrete Inst., 17(6), 871-878. https://doi.org/10.4334/JKCI.2005.17.6.871
  13. Lie, T.T., Lin, T.D., Allen, D.E. and Abrams, M.S. (1984), "Fire resistance of reinforce concrete columns", National Research Council Canada Division of Building Research, No. 1167, Ottawa, 25-45.
  14. Loh, J.S., Azid, I.A., Seetharamu, K.N. and Quadir, G.A. (2007), "Fast transient thermal analysis of Fourier and non-Fourier heat conduction", Int. J. Heat and Mass Transfer, 50(21), 4400-4408. https://doi.org/10.1016/j.ijheatmasstransfer.2007.03.021
  15. Shin, Y.S., Park, J.E., Mun, J.Y. and Kim, H.S. (2011), "Experimental studies on the effect of various design parameters on thermal behaviors of high strength concrete columns under high temperatures", J. Korea Concrete Inst., 23(3), 377-384. https://doi.org/10.4334/JKCI.2011.23.3.377