Numerical simulation and analytical study of glulam timber beams

  • Authors

    • Themistoklis Tsalkatidis Lecturer Department of Architectural Engineering Democritus University of Thrace 67100 Xanthi, Greece
    2014-04-07
    https://doi.org/10.14419/ijet.v3i2.2140
  • Glulam beams or glued-laminated beams consist of sawn lumber laminations (timber) bonded with an adhesive material. This paper, through the mathematical description of the contact conditions that apply at the interfaces of glulam beams and the development of two three-dimensional finite element models by the use of the ANSYS software package, studies the flexural properties of unreinforced (UGB) and reinforced (RGB) glulam beams. The first computational model presents an unreinforced glulam beam that has been produced by three wood laminations of dimensions 6 by 3.6 by 176 cm. The latter one describes a reinforced glulam beam, which has been produced by gluing a 0.15 cm thick steel plate at the bottom edge of the previously described beam. The computational analysis indicates that the two glulam beams have significantly different bearing capacities under the same load and support conditions. The failure mode of the UGB is brittle whereas the one of the RGB is ductile. The numerical results of both models are in close agreement with experimental ones from the international literature.

     

    Keywords: Glulam Timber Beams, Numerical Simulation, Contact.

  • References

    1. C. Issa, Z. Kmeid, Advanced wood engineering: glulam beams, Construction and Building Materials 19 (2005) 99-106.
    2. ENV 1995-1-1: Eurocode 5: Design of timber structures, Part 1-1: General rules and rules for buildings, Brussels, 1995.
    3. ENV 1995-1-2: Eurocode 5: Design of timber structures, Part 1-2: General rules –Structural fire design, Brussels, 1995.
    4. American Institute of Timber Construction: Timber construction manual (4th edition), John Wiley and Sons, New York, 1994.
    5. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Wood handbook - wood as an engineering material, Gen. Tech. Rep. FPL-GTR-113, Madison, 1999.
    6. E. Katsaragakis, Timber structures, N.T.U.A. Press, Athens (in greek), 2000.
    7. K.-J Bathe, Finite element procedures, Prentice Hall, New Jersey, 1996.
    8. P.D. Panagiotopoulos, Inequality problems in mechanics and applications, convex and nonconvex energy functions, Birkhäuser, Boston-Basel-Stuttgart, 1985.
    9. E.S. Mistakidis, G.E. Stavroulakis, Nonconvex optimization and its applications: Nonconvex optimization in mechanics, Kluwer Academic Publishers, Dordrecht / Boston / London, 1998.
    10. Swanson Analysis Systems Inc., ANSYS theory reference, version 8.1, Canonsburg, 2004.
    11. S. Moaveni, Finite Element Analysis: Theory and Application with ANSYS, Prentice Hall, New Jersey, 1999.
    12. T. Tsalkatidis, A. Avdelas, The unilateral contact problem in composite slabs: Experimental study and numerical treatment, Journal of Constructional Steel Research 66 (2010) 480-486.
    13. W. Chen, Constitutive equations for engineering materials. Volume 2: Plasticity and Modeling, Elsevier, New York, 1994.
    14. G. Zhao, A. Li, Numerical study of bonded steel and concrete composite beam, Computers and Structures 86 (2008) 1830-1838.
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  • How to Cite

    Tsalkatidis, T. (2014). Numerical simulation and analytical study of glulam timber beams. International Journal of Engineering & Technology, 3(2), 129-136. https://doi.org/10.14419/ijet.v3i2.2140