European Journal of Wood and Wood Products

, Volume 70, Issue 4, pp 433–440 | Cite as

Embedding strength in joints of fast-growing Argentinean Eucalyptus grandis with dowel-type fasteners. Analysis according to the criterion adopted by European standards

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Abstract

The present paper reports on the results of an investigation regarding the determination of the embedding strength of sawn timber of Argentinean Eucalyptus grandis with dowel-type fasteners. The importance of accurately knowing this property has increased with the increasing demand for this material for structural purposes. An empirical research project with 294 specimens prepared for testing under the embedding action of rigid fasteners (nail, bolt and dowel) was carried out according to the procedures prescribed in EN 383 (2007). The results showed no significant influence of pre-drilling on the embedding strength for nailed joints, which is not in line with the European experience and the corresponding criterion adopted by the Eurocode 5 (2005). The characteristic values of the embedding strength estimated based on the timber density and by applying the corresponding equation from the Eurocode 5 (2005) for bolted joints were 45% and 176% greater than those obtained in this project for the specimens loaded parallel and perpendicular to the grain, respectively, and similar percentages were found for dowelled joints (45% and 126%). These results showed that the reliability of structural design may be strongly affected if the embedding strength of this timber species is estimated by following the procedures adopted by the Eurocode 5 (2005) for dowel-type connections.

Keywords

Timber Eucalyptus Linear Regression Equation Design Rule Timber Species 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Lochleibungsfestigkeit von Vollholz aus Eucalyptus grandis aus Argentinien. Analyse nach europäischen Normen

Zusammenfassung

Dieser Beitrag fasst die Ergebnisse einer Studie zusammen, in der die Lochleibungsfestigkeit von Vollholz aus Eucalyptus grandis aus Argentinien untersucht wurde. Das empirische Versuchsprogramm umfasste 294 Prüfkörper, die mittels steifen Verbindungsmitteln (Nagel, Bolzen und Stabdübel) nach EN 383 (2007) beansprucht wurden. Im Gegensatz zu der europäischen Erfahrung und dem entsprechenden Kriterium des Eurocodes 5 (2005) zeigten die Ergebnisse keinen deutlichen Einfluss der Vorbohrung auf die Lochleibungsfestigkeit von Nagelverbindungen. Die Abschätzung der charakteristischen Lochleibungsfestigkeit in Abhängigkeit der Rohdichte nach Eurocode 5 (2005) ergab Werte die 45 % und 176 % höher sind als die Ergebnisse dieser Untersuchung bei Beanspruchung in Richtung parallel bzw. rechwinklig zur Faser. Ähnliche Abweichungen wurden für die Stabdübelverbindungen gefunden. Diese Ergebnisse zeigten, dass die Zuverlässigkeit der Berechnung von Holzbauwerken stark vermindert werden kann, wenn die charakteristische Lochleibungsfestigkeit dieses Holzes nach dem Kriterium des Eurocodes 5 (2005) abgeschätzt wird.

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References

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Facultad Regional Concepción del UruguayUniversidad Tecnológica NacionalConcepción del UruguayArgentina
  2. 2.Institute of Structural EngineeringETH ZurichZurichSwitzerland

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