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6 records – page 1 of 1.

Deconstructable Hybrid Connections for the Next Generation of Mass Timber Prefabricated Buildings

https://research.thinkwood.com/en/permalink/catalogue2551
Topic
Connections
Application
Hybrid Building Systems
Country of Publication
Canada
Application
Hybrid Building Systems
Topic
Connections
Keywords
Deconstructable Connections
Prefabrication
Modular Construction
Reuse
Seismic Resistance
Research Status
In Progress
Notes
Project contact is Cristiano Loss at the University of British Columbia
Summary
This research aims at developing novel multi-material deconstructable hybrid connections for mass timber prefabricated buildings. Connections will be conceived in order to (i) meet multi-objective structural performance, (ii) favour modular construction, (iii) favour quick erection of buildings, (iv) quick disassemble and possible reuse of the timber members, and (v) provide seismic-resistant structural assemblies.
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Deconstructable Hybrid Connections for the Next Generation of Prefabricated Mass Timber Buildings

https://research.thinkwood.com/en/permalink/catalogue2809
Year of Publication
2021
Topic
Connections
Material
CLT (Cross-Laminated Timber)
Application
Floors
Hybrid Building Systems
Shear Walls
Author
Shulman, Samuel
Loss, Cristiano
Organization
University of British Columbia
Year of Publication
2021
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Application
Floors
Hybrid Building Systems
Shear Walls
Topic
Connections
Keywords
Steel Rods
Epoxy
Push-Out-Shear Tests
Prefabrication
Disassembly
Reuse
Language
English
Research Status
Complete
Summary
Timber has been used for building construction for centuries, until the industrial revolution, when it was often replaced by steel and concrete or confined to low-rise housings. In the last thirty years however, thanks to the development of mass timber products and new global interest in sustainability, timber has begun to make a resurgence in the building industry. As building codes and public perception continues to change, the demand for taller and higher-performance timber buildings will only grow. Thus, a need exists for new construction technology appropriate for taller mass timber construction, as well as for fabrication and deconstruction practices that respect wood’s inherent sustainable nature. With this in mind, this research program aims to develop a new hybrid shear connection for mass timber buildings that allows for easy construction, deconstruction, and reuse of the structural elements. This report includes results of Phase 1, which focused on connections consisting of partially threaded 20M and 24M steel rods bonded into pockets formed in CLT and surrounded by thick crowns of high-strength three-component epoxy-based grout. A total of 168 specimens were designed and fabricated, and push-out shear tests carried out with a displacement-controlled monotonic loading protocol. Strength and stiffness values were assessed and effective failure modes in specimens identified. These latter, along with the recorded load-deformation curves, indicate that it is possible to develop mechanics-based design models and design formulas akin to those already used for typical dowel-type fastener timber connections. Additionally, the specimens were easily fabricated in the lab and quickly fastened to the test jig by means of nuts and washers, suggested such connections have a strong potential for prefabrication, disassembly, and reuse.
Online Access
Free
Resource Link
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End-of-life Disassembly and Re-use of Mass Timber

https://research.thinkwood.com/en/permalink/catalogue2796
Topic
Design and Systems
Environmental Impact
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Organization
TallWood Design Institute
Oregon State University
Country of Publication
United States
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Environmental Impact
Keywords
Deconstructable Connections
End of Life
Disassembly
Reuse
Mass Timber
Research Status
In Progress
Notes
Project contact is Lech Muszynski at Oregon State University
Summary
The aim of this project is to remove this vulnerability by thoughtful conceptualization of basic strategies for optimizing the design of mass timber buildings for successful post-use material recovery/reuse and end-of-life climate benefit. Research questions will include: 1. Is demolition of decommissioned mass timber buildings a viable end-of-life option at all? 2. Can deconstruction be conducted by following construction steps in reverse order? 3.What may be the extent of damage inflicted to the connection nests, connected edges and surfaces of MTP elements during a deconstruction? 4.Can original connection nests be safely reused in structures re-using deconstructed MTP elements? 5.What is the impact of techniques and technologies selected at the design, production, and construction stages on the EOL options and carbon cost of deconstruction, 6. What is the carbon impact of deconstruction on reuse or recycling of MTP elements? 7. Do the existing deconstruction companies in the Pacific northwest have capacity to process mass timber panels that could not be reused? 8. What is the carbon costs of transportation and repurposing/recycling of MTP elements for non-structural uses?
Resource Link
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The Environmental Impact of Reused CLT Panels: Study of a Single-Storey Commercial Building In Japan

https://research.thinkwood.com/en/permalink/catalogue2377
Year of Publication
2018
Topic
Energy Performance
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Passarelli, Rafael
Year of Publication
2018
Country of Publication
Korea
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Energy Performance
Design and Systems
Keywords
Global Warming Potential
Commercial
Panels
Carbon
Design for Reuse
Timber Cascade
Life-Cycle Assessment
LCA
Construction
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Summary
The study investigates the environmental benefits of reusing Cross Laminated Timber (CLT) panels. The Global Warming Potential (GWP) of a single-stored Coffee shop built in 2016 in Kobe city was calculated, considering different CLT reuse ratios, forest land-use and material substitution possibilities. The results showed that as the rate of reused CLT panel increases the total GWP decreases. Moreover, in all cases, the option with smallest GWP is when the surplus wood is used for carbon storage in the forest, revealing the importance of a growing forest for increasing the environmental benefits of timber utilisation. The results suggest the systematic reuse of CLT panels offers a possibility to increase the carbon stock of Japanese Cedar plantation forests and further mitigate the environmental impact of construction.
Online Access
Free
Resource Link
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Feasibility of Cross-laminated Secondary Timber

https://research.thinkwood.com/en/permalink/catalogue2446
Year of Publication
2019
Topic
Design and Systems
Environmental Impact
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Rose, Colin
Stegemann, Julia
Year of Publication
2019
Country of Publication
United Kingdom
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Environmental Impact
Keywords
Cross-Laminated Secondary Timber (CLST)
Secondary Timber
Reuse
Upcycle
Language
English
Research Status
Complete
Series
Proceedings of International Conference on Sustainable Construction Materials and Technologies
Online Access
Free
Resource Link
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Mass Timber in the Circular Economy: Paradigm in Practice?

https://research.thinkwood.com/en/permalink/catalogue2680
Year of Publication
2019
Topic
Environmental Impact
Application
Wood Building Systems
Author
Campbell, Adrian
Year of Publication
2019
Format
Journal Article
Application
Wood Building Systems
Topic
Environmental Impact
Keywords
Sustainability
End of Life
Recycling & Reuse of Materials
Language
English
Research Status
Complete
Series
Engineering Sustainability
Summary
Mass timber products such as cross-laminated timber have increased in popularity in the past decades. Their relative novelty, however, means that there is little actual experience of what happens to the products at end of life. Despite promoting the use of natural capital, biotic materials are not often covered in discussions on construction in the circular economy. Equally, it is unclear what model is most appropriate for construction to incorporate circular thinking. Different actions for circularity are reviewed against sustainable construction ambitions, and a simple model with basic circular actions is proposed as a means to review mass timber construction. Suggestions for how to adapt mass timber systems to include circular methods are presented, including design for combined manufacture and assembly and disassembly, the identification of future markets, improving the durability of timber buildings and acknowledging the wider system value of forestry.
Online Access
Free
Resource Link
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6 records – page 1 of 1.