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Influence of boundary conditions on the thermal response of selected steel members


[ 1 ] Instytut Konstrukcji Budowlanych, Wydział Budownictwa i Inżynierii Środowiska, Politechnika Poznańska | [ P ] employee

Year of publication


Published in

Procedia Engineering

Journal year: 2013 | Journal volume: vol. 57

Article type

scientific article / paper

Publication language


  • fire safety
  • steel structures
  • boundary conditions
  • standard fire curve
  • critical temperature

EN In the paper the influence of boundary conditions on the thermal response of selected steel members subjected to fire loads is investigated. Simply supported and restrained steel beams subjected to uniformly distributed load and fire accidental action are analysed using the standard ISO-fire curve. The iterative procedure to investigate critical temperature is used. At each increment of temperature the ultimate limit state is checked using the EC recommendation. The special attention is focused on axial action occurring due to thermal elongation. The illustrative examples show that, proper modelling of the beam's boundary conditions plays an important role in describing and understanding the real behavior of elements in fire conditions. Moreover, beam's boundary conditions can change structural response and result in reduction of critical temperature and fire resistance time.

Pages (from - to)

977 - 985




Presented on

11th International Conference on Modern Building Materials, Structures and Techniques, MBMST 2013, 16-17.05.2013, Vilnius, Lithuania

License type

CC BY-NC-ND (attribution - noncommercial - no derivatives)

Open Access Mode

open journal

Open Access Text Version

final published version

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Publication indexed in

WoS (15)

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