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Plug shear failure in nailed timber connections: load distribution and failure initiation
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.ORCID-id: 0000-0002-5907-7788
2004 (Engelska)Ingår i: European Journal of Wood and Wood Products, ISSN 0018-3768, E-ISSN 1436-736X, Vol. 62, nr 6, s. 455-464Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Brittle failures in mechanical timber joints should be avoided, because this often results in low capacity and brittle failure of the structure. Nailed joints experience three ultimate failure modes: embedding, splitting or plug stear failure. To avoid plug shear failure, short and wide joints are preferred, limiting the number of fasteners in line with the load and grain direction. Plug shear failure was examined in short-term experiments on nailed steel-to-timber joints in glulam loaded in tension parallel to the grain with five different joint geometries. The aim of the study was to examine if the fastener group layout can be adjusted to avoid plug shear failure and to gain an insight into the causes of failure initiation. Using spring models, it is shown that the load distribution creates pronounced stresses at the last nail in the joint, which probably initiates the plug shear failure. Test results are compared with prediction models found in the literature. It was found that fasteners placed in groups can be a successful way of reducing the risk of plug shear failure. The failure is probably initiated at the nail farthest from the free end, where tensile stresses perpendicular to grain occur.

Ort, förlag, år, upplaga, sidor
2004. Vol. 62, nr 6, s. 455-464
Nationell ämneskategori
Husbyggnad
Forskningsämne
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URN: urn:nbn:se:ltu:diva-13022DOI: 10.1007/s00107-004-0523-9ISI: 000226096400010Scopus ID: 2-s2.0-10844259881Lokalt ID: c2d3e6c0-ad69-11db-905c-000ea68e967bOAI: oai:DiVA.org:ltu-13022DiVA, id: diva2:985973
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Validerad; 2004; 20070126 (ysko)Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2018-08-07Bibliografiskt granskad

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Johnsson, HelenaStehn, Lars

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