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6 records – page 1 of 1.

Acoustic Performance of Timber and Timber-Concrete Composite Floors

https://research.thinkwood.com/en/permalink/catalogue684
Year of Publication
2014
Topic
Acoustics and Vibration
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Floors
Author
Schluessel, Marc
Shrestha, Rijun
Crews, Keith
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Floors
Topic
Acoustics and Vibration
Keywords
New Zealand
Australia
Building Code of Australia
Sound Insulation
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
A major problem in light-weight timber floors is their insufficient performance coping with impact noise in low frequencies. There are no prefabricated solutions available in Australia and New Zealand. To rectify this and enable the implementation of light-weight timber floors, a structural floor was designed and built in laminated veneer lumber (LVL). The floor was evaluated in a laboratory setting based on its behaviour and then modified with suspended ceilings and different floor toppings. Twenty-nine different floor compositions were tested. The bare floor could not reach the minimum requirement set by the Building Code of Australia (BCA) but with additional layers, a sufficient result of R'w+Ctr 53 dB and L’nT,w + CI 50 dB was reached. Doubling of the concrete mass added a marginal improvement. With concrete toppings and suspended ceiling it is possible to reach the goal in airborne and impact sound insulation. The best result was achieved by combining of additional mass and different construction layers.
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A Comparative Life Cycle Assessment Approach of Two Innovative Long Span Timber floors with its Reinforced Concrete Equivalent in an Australian Context

https://research.thinkwood.com/en/permalink/catalogue2375
Year of Publication
2015
Topic
Environmental Impact
Material
CLT (Cross-Laminated Timber)
Timber-Concrete Composite
Application
Floors
Wood Building Systems
Author
Basaglia, Bella
Lewis Kirsten
Shrestha, Rijun
Crews, Keith
Publisher
School of Civial Engineering, The University of Queensland
Year of Publication
2015
Country of Publication
Australia
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Timber-Concrete Composite
Application
Floors
Wood Building Systems
Topic
Environmental Impact
Keywords
Sustainable Materials
LCA
Life-Cycle Assessment
Mid-Rise
Concrete
Language
English
Conference
International Conference on Performance-based and Life-cycle Structural Engineering
Research Status
Complete
Online Access
Free
Resource Link
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Innovation in the Design of Cross Laminated Timber for Long Span Floors

https://research.thinkwood.com/en/permalink/catalogue2311
Year of Publication
2015
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Floors
Author
Lewis, Kirsten
Basaglia, Bella
Shrestha, Rijun
Crews, Keith
Publisher
University of Queensland
Year of Publication
2015
Country of Publication
Australia
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Floors
Topic
Design and Systems
Keywords
Sustainable Materials
Floor Dynamics
Long Span Floors
Structural Design
Language
English
Research Status
Complete
Online Access
Free
Resource Link
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Long-Term Experimental Investigation of Timber Composite Beams in Cyclic Humidity Conditions

https://research.thinkwood.com/en/permalink/catalogue636
Year of Publication
2014
Topic
Serviceability
Moisture
Material
LVL (Laminated Veneer Lumber)
Application
Beams
Author
Hailu, Mulugheta
Shrestha, Rijun
Crews, Keith
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Application
Beams
Topic
Serviceability
Moisture
Keywords
Creep
Eurocode 5
Relative Humidity
Moisture Content
Mechanosorption
Long-term
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
A long term laboratory investigation on two six-meter-span timber composite beams was started from March 2012 at the University of Technology Sydney. These timber composites were made of laminated veneer lumber (LVL). The web and the flanges of the composite timber section were connected using screw-gluing technique. The specimens have been under sustained loads of (2.1kPa) and the environmental conditions was cyclically alternated between normal and very humid conditions whilst the temperature remained quasi constant (22 °C) –typical cycle duration was six to eight weeks. With regard to EC 5, the environmental conditions can be classified as service class 3 where the relative humidity of the air exceeds 85% and the moisture content of the timber samples reaches 20%. During the test, the mid-span deflection, moisture content of the timber beams and relative humidity of the air were continuously monitored. The paper presents the results and observations of the long-term test to-date and the test is continuing.
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Review on Long-Term Behaviour of Timber-Concrete Composite Floors

https://research.thinkwood.com/en/permalink/catalogue904
Year of Publication
2013
Topic
Serviceability
Material
Timber-Concrete Composite
Application
Floors
Author
Khorsandnia, Nima
Valipour, Hamid
Shrestha, Rijun
Gerber, Christophe
Crews, Keith
Year of Publication
2013
Country of Publication
Australia
Format
Conference Paper
Material
Timber-Concrete Composite
Application
Floors
Topic
Serviceability
Keywords
Long-term Behaviour
Temperature
Relative Humidity
Language
English
Conference
Australasian Conference on the Mechanics of Structures and Materials
Research Status
Complete
Notes
December 11-14, 2012, Sydney, Australia
Summary
Timber-concrete composite (TCC) beams are made up two materials, i.e. wood and concrete, which exhibit different behaviours under long-term loading. The time-dependent behaviour of TCC beam is not only affected by the long-term load but also driven by the variation of the environmental conditions such as temperature and relative humidity. In particular, the maximum deflection under service loads may govern the design requirement for medium to long span TCC beams subjected to heavy environmental conditions. For such structures, application of simplified methods adopted by different codes may lead to significant errors. Hence investigating the long-term behaviour of TCC beams subject to variable environmental condition is of great importance for designers and researchers. In this paper the research undertaken on long-term behaviour of TCC floors is critically reviewed and the recent findings are highlighted. The most important references in the literature were selected to provide more depth into the time-dependent performance of TCC structure.
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The Use of Cross Laminated Timber for Long Span Flooring in Commercial Buildings

https://research.thinkwood.com/en/permalink/catalogue1739
Year of Publication
2016
Topic
Acoustics and Vibration
Serviceability
Connections
Material
CLT (Cross-Laminated Timber)
Application
Floors
Author
Lewis, Kirsten
Basaglia, Bella
Shrestha, Rijun
Crews, Keith
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Floors
Topic
Acoustics and Vibration
Serviceability
Connections
Keywords
Long Span
Australia
New Zealand
Transverse Stiffness
Vibration Performance
Boundary Conditions
Numerical Analysis
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4845-4853
Summary
Long span timber floor solutions have demonstrated their potential to compete with concrete and steel construction for multi-storey commercial buildings. Due to the high strength-to-weight ratio of timber, serviceable vibration performance is a critical structural design issue for long spans. This project investigates the vibration performance of cross laminated timber for long span floors in the Australian and New Zealand building sector. Laboratory experiments and computer analysis are used to study the effect of the increased transverse stiffness, inherent to a cross laminated timber, on the vibration performance of the floor. The effect of boundary conditions, connection and support type, are investigated and quantified where possible. A timber joist floor with a plywood sheath is analysed and tested to validate the methods used in this study.
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6 records – page 1 of 1.