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In situ testing of timber floor vibration properties
SP Technical research institute of Sweden. (Träbyggnadsteknik)
University of Southern Denmark, Denmark.ORCID iD: 0000-0003-2025-7842
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Träbyggnadsteknik)ORCID iD: 0000-0002-6410-1017
2010 (English)In: Proceedings of the 11th World Conference on Timber Engineering / [ed] Ario Ceccotti, 2010Conference paper, Published paper (Refereed)
Abstract [en]

In the present work the change in natural frequencies, damping and mode shapes of a prefabricated timber floor element have been investigated when it was integrated into a building structure. The timber floor element was first subjected to modal testing in laboratory with ungrounded and simply supported boundary conditions, and then in situ at different stages of building construction. The first five natural frequencies, damping ratios and mode shapes of the floor element and the entire floor were extracted and analysed. It may be concluded that the major change in natural frequencies occur as the floor element is coupled to the adjacent elements and when partitions are built in the studied room, the largest effect is on those modes of vibration that largely are constrained in their movement. The

in situ conditions have a great influence on the damping, which probably depends on the damping characteristics of the supports, but also on the fact that the floor is integrated into the building and interacts with it. There is a slight increase of damping in the floor over the different construction stages and the damping values seem to decrease with ascending mode order. The relative change also seems to decrease with increasing number of storeys built.

Place, publisher, year, edition, pages
2010.
National Category
Building Technologies
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
URN: urn:nbn:se:lnu:diva-6969OAI: oai:DiVA.org:lnu-6969DiVA, id: diva2:332336
Conference
WCTE 2010
Available from: 2010-08-05 Created: 2010-08-04 Last updated: 2019-10-17Bibliographically approved

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Jarnerö, KirsiBrandt, AndersOlsson, Anders
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CiteExportLink to record
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