Short-term behaviour of laminated veneer lumber slabs subjected to bending
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1
Poznan University of Technology
pl. M. Skłodowskiej-Curie 5
60-965 Poznań
Poland
2
Faculty of Civil and Transport Engineering, Poznan University of Technology
pl. M. Skłodowskiej-Curie 5, 60-965, Poznań, Poland
These authors had equal contribution to this work
Corresponding author
Marcin Chybiński
Poznan University of Technology
pl. M. Skłodowskiej-Curie 5
60-965 Poznań
Poland
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ABSTRACT
In this paper, an investigation of the behaviour of laminated veneer lumber slabs in four-point bending tests was analysed. Two types of laminated veneer lumber (LVL) are manufactured in Poland, i.e., LVL R and LVL X. In LVL R all veneers are glued together longitudinally whereas in LVL X a fifth of the veneers are glued crosswise. In this paper, the short-term behaviour, load bearing-capacity, and mode of failure of slabs made of LVL X were studied. The failure modes of the analysed slabs were associated with the delamination and cracking of veneer layers in the lower part of the slab in the tensile zone. Furthermore, the 3D finite element model was developed and verified against the laboratory test results. In the numerical model, LVL was described as an orthotropic material. What is more, Hill’s function was used to take into account the anisotropic plastic flow of LVL after reaching a yield point. The results of the laboratory tests and the numerical simulation were compared, yielding similar results.