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Experimental and Numerical Investigations of Timber-Glass Shear Walls

https://research.thinkwood.com/en/permalink/catalogue1763
Year of Publication
2016
Topic
Energy Performance
Mechanical Properties
Material
Timber-Glass Composite
Application
Shear Walls
Author
Frangež, Rok
Ber, Boštjan
Premrov, Miroslav
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Timber-Glass Composite
Application
Shear Walls
Topic
Energy Performance
Mechanical Properties
Keywords
Finite Element Model
Load Bearing Capacity
Mechanical Tests
Racking Resistance
Adhesives
Polyurethane
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 5191-5198
Summary
Building large-sized glazing into timber walls has significantly grown over the last years, however when combined, the structural behaviour of both elements can be rather complicated. This is one of the major reasons for this investigation. In order to design energy-efficient timber-frame buildings with enlarged fixed glazing, it is of primary...
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Multi-State Effort to Overcome Barriers to Low-value Hardwood Lumber for CLT Manufacture

https://research.thinkwood.com/en/permalink/catalogue2633
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Organization
Virginia Polytechnic Institute and State University
Country of Publication
United States
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Shear Analogy
Yellow Poplar
Mechanical Tests
Research Status
In Progress
Notes
Project contact is Henry Quesada at Virginia Polytechnic Institute and State University
Summary
This project is a multistate industry-university collaboration between SmartLam, the Northeastern Lumber Manufacturers Association (NELMA), the American Plywood Association (APA), IKD Architectures, Virginia Tech, and Purdue University to advance the utilization of hardwood lumber for the fabrication of Cross- Laminated Timber (CLT). This new proposal builds upon a previous Wood Innovation project. The collaboration among the organizations proposes to: 1) apply the shear analogy method to hardwood species listed in the National Design Standards (NDS) supplement to assure these species are feasible for the construction of structural CLT panels, 2) create a custom grade CLT layup made of yellow poplar (Liriodendron tulipifera) lumber and get its approval by the Engineered Wood Association (APA), 3) train the hardwood industry in the Midwest and in the Southeast on the application of hardwood structural lumber grading rules, and 4) perform mechanical testing on the hardwood CLT panels used in the Conversation Plinth project by IKD Architectures in Columbus, IN. In 2012 Virginia Tech conducted the first experimental tests on hardwood CLT panels. Results indicated that bonding, strength, and stiffness of yellow poplar CLT panels matched or were superior to some of the softwood CLT layups in the APA standard. Similar results were also obtained by independent testing conducted by the American Hardwood Export Council (AHEC) in 2018. However, further investigation by Virginia Tech found that the main limitations for the use of yellow poplar and other low value hardwood species in CTL panels are 1) lack of experimental data on other hardwood species used in CLT panels, 2) lack of supply of structurally graded hardwood lumber, and 3) acceptance and validation of hardwood CLT panels by the APA standard. Overcoming these limitations is critical for the hardwood lumber industry in order to gain access to the CLT market. Currently, the annual production of CLT panels in the US is about 35,000 m3 but it is expected that in 10 years production will be close to 2 million m3 per year. The outcomes of this project are to increase the utilization of low-value hardwood species from national and private forests and to increase economic development in rural areas in the hardwood regions of the US.
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Potential of CLT Produced from Non-Structural Grade Australian Pinus Radiata

https://research.thinkwood.com/en/permalink/catalogue619
Year of Publication
2014
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Sigrist, Christophe
Lehmann, Martin
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Australia
Low-Grade
Pine
Mechanical Tests
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
In Australia CLT has a big potential but has to be imported from overseas to date for quite high prices. Milling of Pinus Radiata using optimised sawing patterns for yield and consecutive mechanical grading lead to a substantial amount of boards, which c...
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