Kobel, Peter
[VerfasserIn]
;
Frangi, Andrea
[MitwirkendeR];
Steiger, René
[MitwirkendeR];
van de Kuilen, Jan-Willem G.
[MitwirkendeR];
Fontana, Mario
[MitwirkendeR]
Anmerkungen:
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Beschreibung:
The presented thesis focuses on the structural behaviour of dowel-type connections in laminated veneer lumber (LVL) made of beech wood (Fagus sylvatica L.). In Europe, beech wood is available in large quantities. However, despite its favourable mechanical properties in terms of strength and stiffness compared to softwood species, it is today mostly used for non-structural purposes. The industrialised production process of beech LVL and the homogeneity resulting from the assembly of thin rotary-peeled veneers ensure controllable and reliable strength and stiffness properties. Thus, beech LVL is a wood-based material with a great potential for applications in high Performance structural elements, as for instance in large-span truss structures. In timber structures, the design is often governed by the connections. Therefore, optimising the connections can significantly enhance the performance of the entire structure. In the presented thesis, dowel-type connections are investigated both experimentally and theoretically. Due to their versatility, dowel-type connections are commonly applied in trusses and other timber structures. Two particular connection designs are investigated in detail: Dowelled connections with one slotted-in steel plate and bolted connections with thin outer steel plates. The prevailing design approach for dowel-type connections is based on ideal rigid-plastic material assumptions. This so-called Johansen Yield Model (JYM) is implemented in current design codes, such as Eurocode 5. However, in reality timber generally shows a rather brittle behaviour, particularly when subjected to shear forces or tension parallel and perpendicular to the grain. Based on extensive investigations focused primarily on solid wood and glulam made of softwoods, the Johansen design approach has been modified in order to take into account these secondary effects due to the brittle nature of timber. The first part of the thesis presents experimental investigations on dowel-type connections in beech LVL. This includes ...