On the need of distinguishing ductile and brittle failure modes in timber connections with dowel-type fasteners. (1st September 2021)

• Record Type: Journal Article
• Authors: Yurrita, Miguel; Cabrero, José Manuel
• Is Part Of: Engineering structures. Volume 242(2021)
• Publication Date: 2021-09-01
• Subjects: Timber connection -- Brittle failure -- Ductile failure -- Dowel-type fasteners -- Parallel-to-grain -- Effective number of fasteners -- Eurocode 5; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2021.112496
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Timber connections with dowel-type fasteners may fail in ductile and brittle ways. The Eurocode 5 combines ductile (EYM) and britte (nef ) in the same calculation. Two calculations models are desirable to identify the expected failure mode. Accurate models are needed for that. The Eurocode 5 approach is conservative. A proposal to improve current accuracy and discrimination ability is given. Abstract: Timber connections can fail in a ductile or in a brittle way. A structural design that guarantees a ductile behaviour in case of failure is desirable, especially when facing extreme situations such as earthquakes. This work discusses how the European Yield Model (based on a ductile failure mechanism), included in many standards, combined with a reduction of the effective number of fasteners may provide too conservative results, which may inadvertently lead to risky situations in which a connection assumed to fail under a ductile mechanism would actually fail in a brittle manner. Within this paper, a proposal to improve the discrimination ability to correctly predict the failure mode is proposed.