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Experimental investigation about the influence of the use of glue in joints in lightweight structures.

Negreira, Juan LU ; Sjöström, Anders LU and Bard, Delphine LU (2011) COMPDYN 2011 In [Host publication title missing]
Abstract
Lightweight timber structures have many advantages, but high-demand acoustic quality is hard to achieve due to the relatively poor insulation through the junctions, especially in the low frequency range (20 Hz-200 Hz) where the weight (mass per unit of area) of a construction is an important parameter for the air-borne insulation properties. Increasing the mass would improve the insulation but this would go against the main advantage of lightweight constructions. Impact sound from a walking person is the most common sound insulation problem for these kinds of structures, where the footsteps produce a high-degree of noise disturbance. The aim of this particular investigation, however, is to show how glue modifies the sound transmission... (More)
Lightweight timber structures have many advantages, but high-demand acoustic quality is hard to achieve due to the relatively poor insulation through the junctions, especially in the low frequency range (20 Hz-200 Hz) where the weight (mass per unit of area) of a construction is an important parameter for the air-borne insulation properties. Increasing the mass would improve the insulation but this would go against the main advantage of lightweight constructions. Impact sound from a walking person is the most common sound insulation problem for these kinds of structures, where the footsteps produce a high-degree of noise disturbance. The aim of this particular investigation, however, is to show how glue modifies the sound transmission through the joints in a wooden floor. Theory shows that coupling occurs in a joint either along a line or at individual points depending on the distance between the screws or nails with regard to the bending wavelength. When a viscous elastic material as glue is inserted in between the parts of the joint, the behavior will change and it is therefore important to be studied. To achieve this aim, two structures were built. The first one constituted of two squared plates of dimension 0.6 m x 0.6 m, each one of them fixed onto one beam 4.5 m wide and 22 cm high, by means of equidistant screws. A second set-up was built too, but this time only a single 1.2 m x 0.6 m plate was fixed onto the beam. The same structures were built again a second time, but this time glue was applied around the screws on the contact surfaces. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Juntions, Timber, Measurements, Glue
in
[Host publication title missing]
pages
10 pages
publisher
Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2011)
conference name
COMPDYN 2011
external identifiers
  • Scopus:80054820072
language
English
LU publication?
yes
id
2b9ddafe-2190-4596-9eb1-f41071159b02 (old id 3172908)
date added to LUP
2012-11-20 10:14:18
date last changed
2016-10-13 04:42:16
@misc{2b9ddafe-2190-4596-9eb1-f41071159b02,
  abstract     = {Lightweight timber structures have many advantages, but high-demand acoustic quality is hard to achieve due to the relatively poor insulation through the junctions, especially in the low frequency range (20 Hz-200 Hz) where the weight (mass per unit of area) of a construction is an important parameter for the air-borne insulation properties. Increasing the mass would improve the insulation but this would go against the main advantage of lightweight constructions. Impact sound from a walking person is the most common sound insulation problem for these kinds of structures, where the footsteps produce a high-degree of noise disturbance. The aim of this particular investigation, however, is to show how glue modifies the sound transmission through the joints in a wooden floor. Theory shows that coupling occurs in a joint either along a line or at individual points depending on the distance between the screws or nails with regard to the bending wavelength. When a viscous elastic material as glue is inserted in between the parts of the joint, the behavior will change and it is therefore important to be studied. To achieve this aim, two structures were built. The first one constituted of two squared plates of dimension 0.6 m x 0.6 m, each one of them fixed onto one beam 4.5 m wide and 22 cm high, by means of equidistant screws. A second set-up was built too, but this time only a single 1.2 m x 0.6 m plate was fixed onto the beam. The same structures were built again a second time, but this time glue was applied around the screws on the contact surfaces.},
  author       = {Negreira, Juan and Sjöström, Anders and Bard, Delphine},
  keyword      = {Juntions,Timber,Measurements,Glue},
  language     = {eng},
  pages        = {10},
  publisher    = {ARRAY(0x9103410)},
  series       = {[Host publication title missing]},
  title        = {Experimental investigation about the influence of the use of glue in joints in lightweight structures.},
  year         = {2011},
}