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  • Glulam beams with finger-joints – numerical and analytical model [Elektronski vir]
    Fortuna, Barbara, gradbenica ; Turk, Goran ; Schnabl, Simon
    Multilayer structural elements are very common in modern engineering, and this is also true for timber components. In our research, the numerical model of a two-layer beam was developed. The model ... takes into account the heterogeneity of the material properties of wood and includes finger-joints, which have been shown to be crucial for the load-bearing capacity of glulam beams. In general, the model allows for any number of layers. However, the beam model is defined with two layers connected with the weakest of all interlayer connections. The novelty of the model is the implementation of an arbitrary number of finger joints which can be positioned in the lower or/and the upper lamella. The model is based on the Timoshenko beam theory and therefore also takes into account the shear deformation of the lamellae. It is asumed that shear deformation between the two layers is identical. The model allows the interlayer slip but the uplift is restrained. These assumptions are consistent with the expected failure modes, which in most cases are related to either material failure and/or finger-joint failure in the tension zone of the beam or shear failure of the adhesive joint parallel to the laminations, in the zone of maximum shear stress above the supports of the beam, where maximum sliding between the layers is also expected. The numerical model can be loaded with distributed or point loads in any direction. To to validate the numerical model, an exact analytical solution was obtained. The analytical model considers the same assumptions as the numerical one. Since the complexity of the exact solution increases with the number of finger-joints, the validation is performed for the beam model with one finger-joint. Comparisons of the internal forces, displacements and slips under load are made. The comparison of the results of the two models shows a very good agreement.
    Vir: Book of abstracts [Elektronski vir] : EMI 2022 (Str. [36])
    Vrsta gradiva - prispevek na konferenci ; neleposlovje za odrasle
    Leto - 2022
    Jezik - angleški
    COBISS.SI-ID - 117878019

    Povezava(-e):

    https://www.emi-conference.org/sites/emi-conference.org/2022/files/inline-files/EMI%202022%20Book%20of%20Abstracts.pdf

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