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An experimental study of the effects of moisture variations and gradients in the joint area in steel-timber dowel joints
Växjö University, Faculty of Mathematics/Science/Technology, School of Technology and Design. Byggteknik.
Växjö University, Faculty of Mathematics/Science/Technology, School of Technology and Design. Byggteknik.ORCID iD: 0000-0002-5333-0682
2008 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 62, no 2, p. 243-247Article in journal (Refereed) Published
Abstract [en]

This experimental study examines the influence of moisture variations on the load-bearing capacity of steeltimber dowel joints. The glulam specimens used to manufacture the joints were first exposed to controlled climate changes. After being stored in the climate chambers, holes were drilled and dowels were inserted. Then, the joints were loaded to failure. The main aim of this study was to investigate how and to what extent moisture variations and gradients in the joint area affects the load-bearing capacity in tension parallel to the grain. The load-bearing capacity was found to be reduced under these conditions when compared to reference joints. Moreover, the brittleness of the joints increased with the time the joints had been exposed to drying. Moistureinduced stresses and cracks in the joint area were found to be a possible explanation of the results. A similar interpretation was given in other studies where other structural timber elements have been studied. This raises an important question of how such moisture effects should be considered in design codes. One possibility is to include the influence of moisture-induced stresses in the k_mod factor used in Eurocode 5. Another way could be to consider this type of moisture effect as an equivalent mechanical load case.

Place, publisher, year, edition, pages
2008. Vol. 62, no 2, p. 243-247
Keywords [en]
glulam structures, moisture gradients, moisture induced stresses, moisture variations, steel-timber dowel joints
National Category
Engineering and Technology
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
URN: urn:nbn:se:vxu:diva-3628DOI: 10.1515/HF.2008.020OAI: oai:DiVA.org:vxu-3628DiVA, id: diva2:203584
Available from: 2008-11-13 Created: 2008-11-13 Last updated: 2017-10-12Bibliographically approved

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Sjödin, JohanSerrano, Erik

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  • apa
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