Structural Engineering and Mechanics

  • 제16권6호
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  • Pages.695-712
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  • 2003
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Non-linear fire-resistance analysis of reinforced concrete beams

  • Bratina, Sebastjan (University of Ljubljana, Faculty of Civil and Geodetic Engineering) ;
  • Planinc, Igor (University of Ljubljana, Faculty of Civil and Geodetic Engineering) ;
  • Saje, Miran (University of Ljubljana, Faculty of Civil and Geodetic Engineering) ;
  • Turk, Goran (University of Ljubljana, Faculty of Civil and Geodetic Engineering)
  • 투고 : 2003.02.24
  • 심사 : 2003.09.26
  • 발행 : 2003.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

The non-linear structural analysis of reinforced concrete beams in fire consists of three separate steps: (i) The estimation of the rise of surrounding air temperature due to fire; (ii) the determination of the distribution of the temperature within the beam during fire; (iii) the evaluation of the mechanical response due to simultaneous time-dependent thermal and mechanical loads. Steps (ii) and (iii) are dealt with in the present paper. We present a two-step computational procedure where a 2D transient thermal analysis over the cross-sections of beams are made first, followed by mechanical analysis of the structure. Fundamental to the accuracy of the mechanical analysis is a new planar beam finite element. The effects of plasticity in concrete, and plasticity and viscous creep in steel are taken into consideration. The properties of concrete and steel along with the values of their thermal and mechanical parameters are taken according to the European standard ENV 1992-1-2 (1995). The comparison of our numerical and full-scale experimental results shows that the proposed mechanical and 2D thermal computational procedure is capable to describe the actual response of reinforced concrete beam structures to fire.

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참고문헌

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피인용 문헌

  1. Numerical modelling of behaviour of reinforced concrete columns in fire and comparison with Eurocode 2 vol.42, pp.21-22, 2005, https://doi.org/10.1016/j.ijsolstr.2005.03.015
  2. Nonlinear analysis of reinforced concrete cross-sections exposed to fire vol.42, pp.2, 2007, https://doi.org/10.1016/j.firesaf.2006.08.009
  3. The structural behavior and simplified thermal analysis of normal-strength and high-strength concrete beams under fire vol.33, pp.4, 2011, https://doi.org/10.1016/j.engstruct.2010.12.030
  4. Progressive Collapse Analysis of a Typical Super-Tall Reinforced Concrete Frame-Core Tube Building Exposed to Extreme Fires vol.53, pp.1, 2017, https://doi.org/10.1007/s10694-016-0566-6
  5. The effects of different strain contributions on the response of RC beams in fire vol.29, pp.3, 2007, https://doi.org/10.1016/j.engstruct.2006.05.008
  6. Finite element modeling of reinforced concrete beams exposed to fire vol.52, 2013, https://doi.org/10.1016/j.engstruct.2013.03.017
  7. Explicit modelling of large deflection behaviour of restrained reinforced concrete beams in fire vol.121, 2016, https://doi.org/10.1016/j.engstruct.2016.04.032
  8. Experiment and Analysis on the Mechanical Behaviour of PC Simply-Supported Slabs Subjected to Fire vol.11, pp.1, 2008, https://doi.org/10.1260/136943308784069513
  9. Fire analysis of steel frames with the use of artificial neural networks vol.63, pp.10, 2007, https://doi.org/10.1016/j.jcsr.2007.01.013
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  11. Numerical Analysis of Coupled Heat and Mass Transfer Phenomena in Concrete at Elevated Temperatures vol.122, pp.2, 2018, https://doi.org/10.1007/s11242-018-1017-2
  12. Modeling of Reinforced Concrete Beams Exposed to Fire by Using a Spectral Approach vol.2018, pp.1687-8442, 2018, https://doi.org/10.1155/2018/6936371
  13. A Computational Model for Prestressed Concrete Hollow-Core Slab Under Natural Fire vol.13, pp.1, 2003, https://doi.org/10.1186/s40069-019-0373-9
  14. Finite Element Analysis and Calculation Method of Residual Flexural Capacity of Post-fire RC Beams vol.14, pp.1, 2020, https://doi.org/10.1186/s40069-020-00428-7
  15. Efficiency of insulation layers in fire protection of FRP-confined RC columns-numerical study vol.77, pp.5, 2003, https://doi.org/10.12989/sem.2021.77.5.673
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