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Cross-Laminated Timber Floor: Analysis of the Acoustic Properties and Radiation Efficiency

https://research.thinkwood.com/en/permalink/catalogue3018
Year of Publication
2022
Topic
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
Application
Floors
Author
Granzotto, Nicola
Marzi, Arianna
Gasparella, Andrea
Organization
Free University of Bozen
Editor
Vasques, César M. A.
Publisher
MDPI
Year of Publication
2022
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Floors
Topic
Acoustics and Vibration
Keywords
Acoustic Characterization
Sound Radiation Efficiency
Research Status
Complete
Series
Applied Sciences
Summary
Cross-Laminated Timber (CLT) is a building technology that is becoming increasingly popular due to its sustainable and eco-friendly nature, as well as its availability. Nevertheless, CLT presents some challenges, especially in terms of impact noise and airborne sound insulation. For this reason, many studies focus on the vibro-acoustic behavior of CLT building elements, to understand their performance, advantages and limitations. In this paper, a 200 mm CLT floor has been characterized in the laboratory, according to ISO standards, by three noise sources: dodecahedron, standard tapping machine and rubber ball. In order to understand the vibro-acoustic behavior of the CLT floor, measurements through the analysis of sound pressure levels and velocity levels, measured by dedicated sensors, were performed. Analysis was carried out in order to understand what is prescribed by the prediction methods available in the literature and by the simulation software. Then, a specific prediction law for the CLT floor under investigation was derived. Finally, an analysis on sound radiation index is provided to complete the vibro-acoustic study.
Online Access
Free
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The Influence of Floor Layering on Airborne Sound Insulation and Impact Noise Reduction: A Study on Cross Laminated Timber (CLT) Structures

https://research.thinkwood.com/en/permalink/catalogue2894
Year of Publication
2021
Topic
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
Application
Floors
Author
Bettarello, Federica
Gasparella, Andrea
Caniato, Marco
Organization
University of Trieste
Free University of Bozen
Editor
Piana, Edoardo
Bonfiglio, Paolo
Rychtarikova, Monika
Publisher
MDPI
Year of Publication
2021
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Floors
Topic
Acoustics and Vibration
Keywords
Impact Noise Transmission
Sound Insulation
Rubber Ball
Tapping Machine
Sustainable
Research Status
Complete
Series
Applied Sciences
Summary
The use of timber constructions recently increased. In particular, Cross Laminated Timber floors are often used in multi-story buildings. The development of standardization processes, product testing, design of details and joints, the speed of construction, and the advantages of eco-sustainability are the main reasons why these structures play a paramount role on the international building scene. However, for further developments, it is essential to investigate sound insulation properties, in order to meet the requirements of indoor comfort and comply with current building regulations. This work presents the results obtained by in field measurements developed using different sound sources (tapping machine, impact rubber ball, and airborne dodecahedral speaker) on Cross Laminated Timber floors, changing different sound insulation layering (suspended ceiling and floating floors). Results clearly show that the influence on noise reduction caused by different layering stimulated by diverse noise source is not constant and furthermore that no available analytical model is able to correctly predict Cross Laminated Timber floors acoustic performances.
Online Access
Free
Resource Link
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A review of the thermal and acoustic properties of materials for timber building construction

https://research.thinkwood.com/en/permalink/catalogue3111
Year of Publication
2021
Topic
Acoustics and Vibration
Author
Caniato, Marco
Marzi, Arianna
Silva, Sandra Monteiro da
Gasparella, Andrea
Organization
Piazza Università
University of Minho
Publisher
Elsevier
Year of Publication
2021
Format
Journal Article
Topic
Acoustics and Vibration
Keywords
Thermal
Simulation
Material
Research Status
Complete
Series
Journal of Building Engineering
Summary
Nowadays, there is a vast need to calculate performances of timber constructions. Usually, simulations are implemented to predict buildings elements final performances. Here, the thermal and acoustic parameters necessary to simulate the performances of timber buildings elements are investigated. These data are need as input information for simulations. Anyway, at present literature does not provide a unified view and it lacks an overall vision. Furthermore, in this paper the material properties used as starting points for simulation methods are collected, compared and catalogued in order to produce a complete dataset, useable for acoustic and thermal simulation in timber buildings.
Online Access
Free
Resource Link
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Timber Buildings with Enhanced Energy and Seismic Performance for the Mediterranean Region

https://research.thinkwood.com/en/permalink/catalogue1637
Year of Publication
2016
Topic
Energy Performance
Seismic
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Author
Ratajczak, Julia
García, Daniel
Polastri, Andrea
Pernigotto, Giovanni
Prada, Alessandro
Baratieri, Marco
Gasparella, Andrea
Benedetti, Cristina
Year of Publication
2016
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Topic
Energy Performance
Seismic
Keywords
Dynamic Behaviour
Italy
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 3142-3151
Summary
Timber buildings are characterized by a thermal inertia lower than other technological solutions in construction. For this reason, some configurations may lead to higher cooling demand and poorer energy performance in hot climates, such as the Mediterranean ones. Possible improvement interventions often regard additional thermal mass but, if not accurately designed, they can worse significantly structural and seismic perfo rmance of timber buildings - which is of primary importance in many Italian regions. In this framework, the TimBEESt project studied some technological solutions for timber buildings in Light Timber Frame and Cross-Laminated Timber, able to improve the dynamic behaviour of the opaque components without worsening their seismic performance. First, the Italian territory was analysed in order to find classes of climate and seismic solicitations and energy and structural performances of reference LTF and CLT building models were simulated. Then, for each Italian province, specific interventions and improvements were defined and evaluated.
Online Access
Free
Resource Link
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