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Connection Performance for LVL-Concrete Composite Floor System

https://research.thinkwood.com/en/permalink/catalogue292
Year of Publication
2015
Topic
Connections
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Floors
Author
Fong Lee, Yen
Abd. Ghafar, Nor
Abd. Rahman, Norashidah
Yeoh, David
Organization
International Integrated Engineering Summit (IIES)
Year of Publication
2015
Country of Publication
Malaysia
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Floors
Topic
Connections
Mechanical Properties
Keywords
Push-Out
Notch Connections
Failure
Strength
Stiffness
Ultimate Limit States
Serviceability Limit States
Language
English
Conference
IIES 2014
Research Status
Complete
Notes
December 1-4, 2014, Johor, Malaysia
Summary
The LVL-concrete composite (LCC) structure is a hybrid in system which the LVL member is well connected to the concrete slab by a connector to produce composite action. Various types of connector with different stiffness and shear capacity are available in the market currently. The stiffness of the connector is identified through the push-out experiment. The notch connections for LVL concrete composite beams have higher stiffness and strength compared to mechanical fasteners. This paper discusses the experimental results of symmetrical push-out tests on 3 different types of connector, 150mm rectangular notch with 10mm diameter screw, 100mm rectangular notch with 8mm diameter screw and 100mm triangular notch with 8mm diameter screw. The experimental test was shear push out to failure and the type of failure was discussed. The 150mm rectangular notch was found to be strongest among all and low cost. The 100mm rectangular notch was found to be slightly stiffer than 100mm triangular notch but 100mm triangular notch is easier to construct with only 2 cut. The maximum strength and stiffness at ultimate limit states and serviceability limit states of each type of connection were discussed in this paper.
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Hybrid Cross Laminated Timber Plates (HCLTP) – Numerical Optimisation Modelling and Experimental Tests

https://research.thinkwood.com/en/permalink/catalogue1751
Year of Publication
2016
Topic
Design and Systems
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Sustersic, Iztok
Brank, Boštjan
Dujic, Bruno
Brezocnik, Jaka
Gavric, Igor
Aicher, Simon
Dill-Langer, Gerhard
Winter, Wolfgang
Fadai, Alireza
Demschner, Thomas
Ledinek, Gregor
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Design and Systems
Mechanical Properties
Keywords
Timber Ribs
Concrete Topping
Ultimate Limit States
Serviceability Limit States
Numerical Modelling
Experimental Tests
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4989-4996
Summary
This paper presents the development of two new types of hybrid cross-laminated timber plates (HCLTP) with an aim to improve structural performance of existing cross-laminated timber plates (Xlam or CLT). The first type are Xlam plates with glued timber ribs and the second type are Xlam plates with a concrete topping. A numerical...
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Long-Term Performance of Timber-Concrete Composite Flooring Systems

https://research.thinkwood.com/en/permalink/catalogue310
Year of Publication
2015
Topic
Connections
Mechanical Properties
Serviceability
Moisture
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Floors
Author
Hailu, Mulugheta
Organization
University of Technology Sydney
Year of Publication
2015
Country of Publication
Australia
Format
Thesis
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Floors
Topic
Connections
Mechanical Properties
Serviceability
Moisture
Keywords
Serviceability Limit States
Deflection
Long-term Behaviour
Creep
Mechanosorption
Eurocode
Language
English
Research Status
Complete
Summary
The objectives and scope of this study are to conduct long-term experimental test on timber-concrete composite beams, analyse the results to determine the creep coefficient of the composite system and compare the experimental results with the analytical solutions in accordance with Eurocode 5, in which the effective modulus method is used to account the effect of creep. To achieve the aforementioned objectives, a long-term laboratory investigation was started in August 2010 on four 5.8m span TCC beams with four different connector types. The specimens have been under sustained loads of 1.7kPa and subjected to a cyclic humidity conditions whilst the temperature remains quasi constant (22 °C). During the test, the mid-span deflection, moisture content of the timber beams and relative humidity of the air are continuously monitored. The long-term test is still continuing, two TCC beams were unloaded and tested to failure after 550 days, while the other two TCC beams are still being monitored and this report included experimental results up to the first 1400 days only. The long-term investigation on the two timber only composite floor beams commenced on March 2013 and the results are reported for the first 800 days from their commencement.
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Wood Infill Walls in Reinforced Concrete Frame Structures: A Wood/Concrete Construction Niche

https://research.thinkwood.com/en/permalink/catalogue1591
Year of Publication
2013
Topic
Mechanical Properties
Material
Timber-Concrete Composite
Light Frame (Lumber+Panels)
Application
Hybrid Building Systems
Author
Blaylock, Jeffrey
Bartlett, Michael
Organization
University of Western Ontario
Year of Publication
2013
Country of Publication
Canada
Format
Thesis
Material
Timber-Concrete Composite
Light Frame (Lumber+Panels)
Application
Hybrid Building Systems
Topic
Mechanical Properties
Keywords
Mid-Rise
High-Rise
Deflection
Serviceability Limit States
Ultimate Limit States
Reinforced Concrete
Language
English
Research Status
Complete
Summary
This thesis investigated light-frame wood/concrete hybrid construction as part of the NSERC Strategic Network on Innovative Wood products and Building Systems (NEWBuildS). A review of eight wood/concrete niche areas identified three with potential to be used in mid- to high-rise structures. Light-frame wood structures of seven or more storeys with wood/concrete hybrid flooring seem to have little feasibility unless a concrete lateral-load-resisting system is provided and material incompatibilities are solved. Non-load-bearing light-frame wood infill walls in reinforced concrete frame structures were recognized to have potential feasibility in mid- to high-rise structures. A full-scale, single frame test apparatus was successfully designed and constructed at the Insurance Research Lab for Better Homes. The frame is statically loaded to accurately replicates realistic horizontal sway and vertical racking deformations of a typical eight storey reinforced concrete frame structure at SLS and ULS. A linear-elastic analysis of the test apparatus was generally able to predict the results during testing. The 2.4m x 4.8m (8 ft. x 16 ft.) infill wall specimen did not satisfy serviceability deflection limitations of L/360 when subjected to representative out-of-plane wind pressures of +1.44/-0.9 kPa. The out-of-plane response was not significantly affected by horizontal sway deflections of +/-7.2mm or vertical racking deflections of +9.6mm. Although a nominal 20mm gap was provided to isolate the wall from the surrounding frame, insulation foam sprayed in the gap facilitated load transfer between them.
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