Abstract
This paper presents an experimental study on the flexural behavior of hybrid Pine-Birch Glued-Laminated Timber (GLT) beams. The study focuses on the performance of GLT beams with different lengths (2.1 and 2.8 m) and different compositions of birch (30 and 50%) and pine lamellas. The experiments were conducted using a four-point bending test and data were analyzed using Linear Voltage Displacement Transducers and Digital Image Correlation techniques. The results highlight that pure pine GLT beams exhibited brittle failure, while pure birch beams displayed a more ductile behavior. The hybrid GLT beams demonstrated a transitional behavior between the two. The presence of birch lamellas in the hybrid beams highlights the potential of these beams in structural applications, and significantly improves the global bending modulus of elasticity, bending strength, and flexural ductility compared to pure pine beams.
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Acknowledgements
The authors express their gratitude to Professor Gerhard Schickhofer from the Institute of Timber Engineering and Wood Technology from Graz University of Technology for the support provided in performing the experimental part during the research mobility of the doctoral student, Cristian Timbolmas. In addition, the authors would like to express their sincere thanks to Mr. Georg Jeitler and Mr. David Obernosterer from Hasslacher Norica Timber Gmbh Company (Austria) for supplying the birch and pine boards.
Funding
This work has been possible owing to the financial support of the “SMART_Timber” Project (PID2020.114386RB.I00) funded by MCIN/AEI/10.13039/501100011033 and the “LightTimber” Project (TED2021.130039B.I00) funded by MCIN/AEI /10.13039/501100011033 and the European Union NextGenerationEU/ PRTR, and the FPI research fellowship program sustained by research mobility at the Institute of Timber Engineering and Wood Technology of Graz University of Technology (Austria).
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C.T.: Investigation, Methodology, Data curation, Writing – original draft. R.B.: Conceptualization, Formal analysis, Software, Supervision, Validation, Writing – original draft. F.R.: Conceptualization, Project administration, Validation, Writing – review & editing. A.R.: Formal analysis, Resources, Supervision, Validation. R.S.: Experimental methodology, part of the experimental tests and validation. J.L.: Conceptualization, Formal analysis, Software, Writing – review & editing.
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Timbolmas, C., Bravo, R., Rescalvo, F.J. et al. Experimental study of hybrid pine-birch glued-laminated timber beams assisted by digital image correlation technique. Eur. J. Wood Prod. (2024). https://doi.org/10.1007/s00107-024-02063-5
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DOI: https://doi.org/10.1007/s00107-024-02063-5