Analysis of simply supported wood beams at ambient and high temperatures

  • Authors

    • Elza M M Fonseca
    • Pedro J V Gouveia
    2018-04-20
    https://doi.org/10.14419/ijet.v7i2.23.11911
  • Wood, Beam, Temperature, Safety, Load bearing capacity.

  • Abstract

    The main objective of this work is to present a methodology for safety analysis of simply supported wood beams at ambient and high temperatures with a concentrated load at mid-span. Sixteen different beam configurations will be studied. All calculations were conducted according the Eurocode 5, part 1-1 and part 1-2. During this study will be analyzed the safe load bearing capacity according standards and compared with the elastic and plastic load from beam theory. The beam theory can provide sufficient accuracy up to the point of instability. The standard methods are generally conservative and they are suitable to be used for design purposes with safety. The studied beam cross sections will be in glued laminated wood, as yellow birch, with characteristics equals to a Glulam GL28H.

     

  • References

    1. [1] Leonardo da Vinci Pilot Projects, Educational Materials for Designing and Testing of Timber Strutures – TEMTIS, Handbook 1 –Timber Structures, (2008).

      [2] Winady J, Rowell R. Handbook of Wood Chemistry and Wood Composites, Chapter 11: Chemistry of Wood Strength., CRC Press LLC, (2005).

      [3] CEN, EN1995-1-2: Eurocode 5: Design of timber structures. Part 1-2: General Structural fire design, Brussels, 2003.

      [4] Do MH, Springer GS, (1983), Failure Time of Loaded Wooden Beams During Fire. Journal of Fire Sciences, 1, 297-303.

      [5] David LP Couto, Elza MM Fonseca, Paulo AG Piloto, Jorge M Meireles, Luísa MS. Barreira, Débora RSM. Ferreira, (2016), Perforated cellular wooden slabs under fire: numerical and experimental approaches. Journal of Building Engineering, 8, 218-224. doi:10.1016/j.jobe.2016.10.007

      [6] EMM. Fonseca, DCS. Coelho, LMS. Barreira, (2012), Structural safety in wooden beams under thermal and mechanical loading conditions. International Journal of Safety and Security Engineering, 2/3, 242-255. doi:10.2495/SAFE-V2-N3-242-255

      [7] EMM. Fonseca, L. Barreira, (2011), Experimental and Numerical Method for Determining Wood Char-Layer at High Temperatures due an Anaerobic Heating. International Journal of Safety and Security Engineering, 1/1, 65-76. doi:10.2495/SAFE-V1-N1-65-76

      [8] EMM. Fonseca, L. Barreira, ‘’High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study’’, WIT Press, Fourth International Conference on Safety and Security Engineering IV, M. Guarascio, G. Reniers, C.A. Brebbia, F. Garzia (Ed.), Belgium, Vol.117, (2011) pp.171-183. doi:10.2495/SAFE110161

      [9] EMM. Fonseca, L Barreira, ‘’Charring rate determination of wood pine profiles submitted to high temperatures’’, WIT Press, Third International Conference on Safety and Security Engineering, M. Guarascio, C.A. Brebbia, F. Garzia (Ed.), Italy, Vol.108, (2009), pp.449-457. doi:10.2495/SAFE090421

      [10] CEN, EN1995-1-1: Eurocode 5: Design of timber structures. Part 1-1: General Common rules and rules for buildings, Brussels, 2004.

      [11] M Tavakkol-Khah, W Klingsch, ‘’ Calculation model for Predicting Fire Resistance Time of Timber Members’’, Fire Safety Science – Proceedings of the Fifth International Symposium, (1997), pp.1201-1211. doi:10.3801/IAFSS.FSS.5-1201

      [12] Robert H Wite, SFPE Handbook of Fire Protection Engineering, Analytical Methods for Determining Fire resistance of Timber Members, Section 4, NFPA, (2008), pp.346-366.

      [13] Structural Timber Association, Fire safety in timber buildings, 7 Structural Timber Engineering Bulletin, REV0-11.11.14/EB007.

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  • How to Cite

    M M Fonseca, E., & J V Gouveia, P. (2018). Analysis of simply supported wood beams at ambient and high temperatures. International Journal of Engineering & Technology, 7(2.23), 180-183. https://doi.org/10.14419/ijet.v7i2.23.11911

    Received date: 2018-04-22

    Accepted date: 2018-04-22

    Published date: 2018-04-20