Bending characteristics of beech structural timber (Fagus sylvatica, L.)

• Autorzy: Rohanová, A. , Bajza, O.
• Języki publikacji: EN

Abstrakty

EN

Beech wood is a perspective material in building constructions. The design is required to define its characteristic parameters according to EN 338 (2016). Determined through the bending characteristics (bending strength and modulus of elasticity) and density wood. Structural beech timber source in Slovakia was tested by bending test according to EN 408 + A1. The bending characteristics of bending strength, modulus of elasticity (global) were determined on body dimensions (150×50×3000 mm, n = 52, w = 12%). Wood density was measured on small specimens (?408) and boards (?board).The normality of distribution bending characteristics and density wood was evaluated by three independent statistical tests.The tests do not negate the zero hypothesis of the normal distribution of the observed characteristics.The correlation between f408 and Em,g,408 is weak r2 = 0.11.Between the density of wood ?408 and the bending strength fm,408 no correlation has been demonstrated FRÜHWALD (2008), CIBECCHINI et al. (2016).Correlations between the modulus of elasticity (global) and wood density (?board) is significant (r2 = 0.39).The results form the basis for assessing the quality of beech wood in strength classes.

Słowa kluczowe

EN

beech wood; structural timber; bending strength; modulus of elasticity; density wood; quality

• Czasopismo: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
• Rocznik: 2018
• Tom: No. 104
• Strony: 295--301
• Opis fizyczny: Bibliogr. 17 poz.

Twórcy

autor

Rohanová, A.

• Faculty of Wood Sciences and Technology, Technical University in Zvolen

autor

Bajza, O.

• Faculty of Wood Sciences and Technology, Technical University in Zvolen

Bibliografia

• 1. BAJZA, O., 2018. Verifikácia parametrov kvality bukového konštrukčného dreva rôznymi metódami triedenia. Dizertačná práca. DF Technická Univerzita vo Zvolene, 2018, 125 s.
• 2. CIBECCHINI, A. - CAVALLI, A. - GOLI,G. - TOGNI, M., 2016.Beech sawn timber for structural use: A case study for mechanical characterization and optimization of the Italian visual strength grading rule. Florence: Journal of Forest Science, 62, 2016 (11): 521–528, 2016. DOI: 10.17221/93/2016-JFS.
• 3. DEUBLEIN, M., STEIGER, R., KÖHLER, J., 2010. Quality control and improvement of structural timber. http://www.cte.napier.ac.uk/e53/47. In The future of quality control for wood & wood products : the final conference of COST Action E53 : 4-7th May 2010, Edinburgh, UK. - Edinburgh : Edinburgh Napier University, 2010.
• 4. FRŰHWALD, K., 2008. Procedure for determination of characteristic values of hardwood. Oslo -Frühwald. pdf, 2008. (Cit. 24.5.2018). Dostupné na internete: http://www.coste53.net/downloads/Oslo/Oslo-WG3/COSTE53-MeetingOslo-WG3.
• 5. FRIEDRICH, G. - DENZLER, J. K., 2010. Comparison of Slovakian spruce from different regions. HolzFoschung, Austria, Vienna, Timber Construction and Materials. Project GRADEWOOD, 2010, 6 p.
• 6. GLOS, P., 1999. The Great Potential of Wood as a Building Material for the next century. In.International RILEM Symposium on Timber Engineering. Bagneux : RILIM, ISBN 2-912143-10-1, pp.3−12.
• 7. KRZOSEK, S., GRZESKIEWICZ, M.,BACHER, M., 2008.Mechanical properties of Polish-grow Pinus sylvestris L. Structural sawn timber. END USER´S NEEDS FOR WOOD MATERIAL AND PRODUCTS. COST E53 Conference proceedings, 2008, TU Delft, The Netherlands, 2008, pp. 253 – 260, ISBN/EAN: 978-90-5638-202-5.
• 8. PAZLAR, T., SRPČIČ, J., PLOS, M., TURK, G., 2011. Non-destructive tests for strength grading of Slovenian structural sawn timber. In. 17th International nondestructive testing and evaluation of wood symposium. (ed. Ferenc Divos). Sopron: University of West Hungary. ISBN 978-963-9883-82-6. pp. 231-238.
• 9. ROHANOVÁ, A., JABLONSKI, M., KRZOSEK, S., 2009.Strength grading of constructional lumber in regard to European, German, Slovak and Polish standards. Annals of Warsaw University of Life Sciences – SGGW. Forestry and Wood Technology No. 69, 2009: Ann. WULS-SGGW, For and Wood Technol. 69, 2009. p. 227−233. ISSN 1898- 5912.
• 10. STAPEL, P., DENZLER, J. K., 2011.Influence of the origin on specific properties of European spruce and pine. http://www.cte.napier.ac.uk/e53/47. In The future of quality control for wood & wood products: the final conference of COST Action E53: 4-7th May 2010, Edinburgh, UK. - Edinburgh: Edinburgh Napier University, 2010.
• 11. WEIDENHILLER, A., DENZLER, J. K., 2009.Optimizing machine strength grading with three indicating properties”. In. Proceedings of the Economic and technical aspects of quality control for wood and wood products. Cost Action E53 Conference 22nd – 23rd October 2009, Lisbon, Portugal. Paper 7.
• 12. EN 338., 2016: Structural timber - Strength classes.
• 13. EN 384., 20107: Structural timber - Determination of characteristic values of mechanical properties and density.
• 14. EN 408 + A1., 2013: Timber structures - Structural timber and glued laminated timber. Determination of some physical and mechanical properties. 2013.
• 15. EN 14 081-1., 2016. Timber structures. Strength graded structural timber with rectangular cross section. Part1: General requirements.
• 16. EN 14358., 2016: Timber structures - Calculation and verification of characteristic values.
• 17. STN 49 1531/Z1., 2006: Drevo na stavebné konštrukcie. Vizuálne triedenie podľa pevnosti.Bratislava: SÚTN, 2006.

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).