| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Van De Kuilen, Jan-Willem
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Time to failure analysis of wood adhesives
- 2023Combining Architectural Conservation and Seismic Strengthening in the Wood-Based Retrofitting of a Monumental Timber Roofcitations
- 2021Connection of timber foundation piles to concrete extension piles
- 2021An analytical model describing the in-plane behaviour of timber diaphragms strengthened with plywood panelscitations
- 2021Dissipative properties of timber diaphragms strengthened with plywood panels
- 2021An integral approach for the assessment of timber pile foundations
- 2021Comparing In-Plane Equivalent Shear Stiffness of Timber Diaphragms Retrofitted with Light and Reversible Wood-Based Techniquescitations
- 2020European beech log and lumber grading in wet and dry conditions using longitudinal vibrationcitations
- 2020Experimental and analytical evaluation of the in-plane behaviour of as-built and strengthened traditional wooden floorscitations
- 2009Self healing cementitious composites for sustainble infrastructures
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article
European beech log and lumber grading in wet and dry conditions using longitudinal vibration
Abstract
<jats:title>Abstract</jats:title><jats:p>In Central Europe, European beech (<jats:italic>Fagus sylvatica</jats:italic> L.) is the most frequently occurring hardwood species. An efficient grading method has the potential to promote its utilisation as construction material. Wood density, eigenfrequency and length were measured in 99 European beech logs for calculating the dynamic modulus of elasticity (<jats:italic>MOE<jats:sub>dyn</jats:sub></jats:italic>) obtained by longitudinal vibration (resonance). In addition, the log taper was measured. Of those logs, 867 boards were cut using a bandsaw. The <jats:italic>MOE<jats:sub>dyn</jats:sub></jats:italic> in green condition was determined on 505 of the boards and the <jats:italic>MOE<jats:sub>dyn</jats:sub></jats:italic> in dry conditions was determined on all of them. The r<jats:sup>2</jats:sup> value between the <jats:italic>MOE<jats:sub>dyn</jats:sub></jats:italic> of a log and the mean of <jats:italic>MOE<jats:sub>dyn</jats:sub></jats:italic> of its boards was 0.72 in the wet condition. The <jats:italic>MOE<jats:sub>dyn,12%</jats:sub></jats:italic> of boards significantly increased by 88 N mm<jats:sup>−2</jats:sup> for each centimetre away from the pith. The negative effect of log taper on <jats:italic>MOE<jats:sub>dyn</jats:sub></jats:italic> of boards was barely significant (P-value = 0.050). The <jats:italic>MOE<jats:sub>dyn,12%</jats:sub></jats:italic> was highly dependent on the <jats:italic>MOE<jats:sub>dyn,wet</jats:sub></jats:italic> (r<jats:sup>2</jats:sup> = 0.83) and was 17% higher than the <jats:italic>MOE<jats:sub>dyn,wet</jats:sub></jats:italic>. The mechanical properties of European beech timber exceed those of European softwood species. However, the relationships regarding <jats:italic>MOE<jats:sub>dyn</jats:sub></jats:italic> between different grading levels in the processing chain appear to be similar to those of softwoods.</jats:p>