Structural dynamics of a dowelled-joist timber floor in the low-frequency range modelled using finite element simulation

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DOIResolve DOI: http://doi.org/10.1016/j.engstruct.2017.07.009
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TypeArticle
Journal titleEngineering Structures
ISSN0141-0296
Volume148
Issue1
Pages602620
Subjecttimber floor; dowel connections; vibration; modal analysis; vibration serviceability; Eurocode 5
AbstractThis paper concerns the development and validation of Finite Element Methods (FEM) to simulate the dynamic response of a dowelled-joist timber floor. This is a solid floor comprised of timber joists connected using timber dowels with individual assemblies connected using inclined metal screws. The focus is on the structural dynamics in the low-frequency range up to 200 Hz which is the relevant range for impact sound insulation and vibration serviceability. Dowel connections between the joists that formed each assembly were modelled using either rigid or spring connectors in the FEM models. The validation against experimental modal analysis showed that both approaches were valid in terms of the eigenfrequencies, Modal Assurance Criterion (MAC) and the spatial-average velocity with point excitation. Whilst the FEM model with spring connectors had a higher number of correlated modes in the MAC analysis, this required removal of many spurious modes before predicting the response. The validated models were used to demonstrate the potential in predicting assessment parameters for vibration serviceability that are contained in EN 1995-1-1 (Eurocode 5). This predictive approach to the evaluation of vibration serviceability has the advantage in that it can be used for non-standard timber floors with non-standard boundary conditions or floor plans.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationConstruction; National Research Council Canada
Peer reviewedYes
NPARC number23002105
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Record identifier7ca59fd4-a62f-41ac-86f7-7900fc7d2620
Record created2017-08-22
Record modified2017-08-22
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