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10 records – page 1 of 1.

Assessing the Complexity of Timber Gridshells in Architecture through Shape, Structure, and Material Classification

https://research.thinkwood.com/en/permalink/catalogue1876
Year of Publication
2019
Topic
Design and Systems
Application
Shell Structures
Author
Charest, Philippe
Potvin, André
Demers, Claude
Ménard, Sylvain
Publisher
North Carolina State University
Year of Publication
2019
Format
Journal Article
Application
Shell Structures
Topic
Design and Systems
Keywords
Timber gridshells
Free-Form
Architectural Complexity
Non-Standard Grids
Natural Composite Materials
Research Status
Complete
Series
BioResources
Summary
New possibilities offered by recent modelling software allow the design of organic shapes that are appealing to architects and engineers but may encompass serious issues such as an overconsumption of materials. In this context, there is a renewed interest in systems allowing the materialization of curved surfaces such as timber gridshells, which can be defined as shells with their structures concentrated in strips. However, gridshell design becomes highly challenging if complex grid configurations and new material possibilities are combinedly explored with form generations. These upheavals highlight the need for a classification system to seize the potential and the limitations of timber gridshells to address complex geometries. The classification of 60 timber gridshells enables a critical examination in the course of the ceaseless quest for complexity in architecture by evaluating current building possibilities and predict future building opportunities in terms of form, structure, and materiality.
Online Access
Free
Resource Link
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Comparison of Test Methods for the Determination of Delamination in Glued Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue2428
Year of Publication
2019
Topic
Design and Systems
Material
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems

Demonstration of Fire Performance of Durable Wood Strand Mass Timber Panels

https://research.thinkwood.com/en/permalink/catalogue2573
Topic
Fire
Material
Other Materials
Organization
Washington State University
University of Minnesota Duluth
Material
Other Materials
Topic
Fire
Keywords
Wood Strand Mass Timber Panel
Thermal Modification
Fire Performance
ASTM E119 test standard
Research Status
In Progress
Notes
Project contact is Vikram Yadama at Washington State University
Summary
Lumber yields from small diameter timber (SDT), such as ponderosa and lodge pole pine and grand fir, proposed in this study, are significantly lower (
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Expanding wood use towards 2025: development of mass timber midply wall systems, year 1

https://research.thinkwood.com/en/permalink/catalogue2907
Year of Publication
2021
Topic
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Walls
Shear Walls
Author
Chen, Zhiyong
Ni, Chun
Dagenais, Christian
Hu, Lin
Organization
FPInnovations
Year of Publication
2021
Format
Report
Material
CLT (Cross-Laminated Timber)
Application
Walls
Shear Walls
Topic
Seismic
Keywords
Performance
Building Construction
Building Materials
Standard
Research Status
Complete
Summary
Mass timber (MT) building systems are gaining momentum around the world, especially in Canada where Federal and Provincial governments encourage the greater use of wood in construction projects through various promotion programs such as GCWood Program. In the meanwhile, seismic design provisions in the 2020 National Building Code of Canada have been revised, resulting in significantly higher seismic loads for structures in many locations. Consequently, there is a need to develop new lateral load resisting systems that allow mass timber structures to better compete against their counterparts in steel, concrete and masonry. Building on the success of midply shear walls for wood-frame construction, a multi-year research project was initiated at FPInnovaitons to develop MT version of midply shear wall systems that have greater structural capacities, fire, and acoustical performance. In the first year of this project, literature reviews were conducted to identify the code requirements on MT components and to survey the available LLRSs used in the MTstructures. Conceptual MT midply wall systems meeting structural, fire, and acoustical performance requirements were proposed. An advisory group meeting was held to evaluate the practicability of the proposed MT midply systems. In the next fiscal year, the proposed MT Midply will be optimised further according to the comments and suggestions from the advisory group. Analytical evaluation of the proposed MT Midply wall systems along with necessary tests will be conducted. Based on the evaluation, a go / no-go decision will be made as to whether the study should be continued for the proposed MT Midply.
Online Access
Free
Resource Link
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Expanding wood use towards 2025: increased seismic loads in the 2020 National Building Code

https://research.thinkwood.com/en/permalink/catalogue2906
Year of Publication
2021
Topic
Seismic
Application
Shear Walls
Author
Popovski, Marjan
Bagheri, Mehdi
Chen, Zhiyong
Ni, Chun
Organization
FPInnovations
Year of Publication
2021
Format
Report
Application
Shear Walls
Topic
Seismic
Keywords
Building Code
Standard
Building Construction
Building Materials
Earthquake
Research Status
Complete
Summary
National Building Code of Canada (NBC) 2020 is the latest edition of the national model code that will be published towards the end of 2021. Based on the best available information from the Standing Committee on Earthquake Design (SCED) at the time of writing this report, the seismic design demand in the NBC 2020 has increased for all site classes for many locations across the country. Also, there are other changes in NBC 2020 that might impact the seismic analysis and design of timber buildings. The main objective of this report is to compare the NBC 2020 to the 2015 edition, with emphasis on the level of the seismic design loads (demands), and potential impacts on the analysis and design of timber buildings.
Online Access
Free
Resource Link
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Life Cycle Analysis of Cross Laminated Timber in Buildings: A Review

https://research.thinkwood.com/en/permalink/catalogue2141
Year of Publication
2019
Topic
Environmental Impact
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Cadorel, Xavier
Crawford, Robert
Organization
The University of Melbourne
Year of Publication
2019
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Environmental Impact
Keywords
Greenhouse gas emissions
Life-Cycle Assessment European Standard EN15978
Multi-Family
Multi-Storey
Mixed-Use Building
Buildings
Conference
International Conference of the Architectural Science Association
Research Status
Complete
Summary
Greenhouse gas (GHG) emissions have increased for the last three consecutive years in Australia, and this directly threatens our ability to meet our 2030 GHG emission reduction target under the Paris Agreement. Despite progress in reducing building-related GHG emissions, little focus has been placed on the indirect GHG emissions associated with building material manufacture, and construction. Cross laminated timber (CLT) is an alternative construction material that has been subject to numerous comparison studies, including many life cycle assessments (LCA). The aim of this paper is to provide a review of the recent literature on the environmental performance of CLT construction for Medium Density Residential (MDR) buildings and to identify knowledge gaps that require further research. Studies reviewed were sourced from web-based research engine, direct searches on global wood promotion websites, and the review was limited to peer reviewed publications. This review provides a useful basis for informing the exploration of important gaps in the current knowledge of how CLT buildings perform from an environmental perspective. This will ensure a comprehensive understanding of the environmental benefits of CLT construction and inform decision-making relating to structural material selection for optimising the life cycle GHG emissions performance of buildings.
Online Access
Free
Resource Link
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Life Cycle Carbon Emission Assessment for Wood Frame Buildings in China

https://research.thinkwood.com/en/permalink/catalogue2273
Year of Publication
2019
Topic
Environmental Impact
Application
Wood Building Systems
Organization
China Academy of Building Research
Year of Publication
2019
Format
Report
Application
Wood Building Systems
Topic
Environmental Impact
Keywords
Life-Cycle Assessment
China Standard for Building Carbon Emission Calculation
Carbon Emissions
Research Status
Complete
Notes
English summary of the report is on pages 80-102
Summary
Relying on China’s national standard “Standard for Building Carbon Emission Calculation” and related reports published by the Athena Institute, this report calculates the life cycle carbon emissions of wood buildings in China. The study collects basic information of all the projects, such as quantity of building materials, building envelope, energy system and so on. Calculations are conducted for 7 projects from the aspects of product stage, transportation stage, construction stage, operational energy and demolition stage
Online Access
Free
Resource Link
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Mass timber seismic force resisting systems in the Canadian codes and standards

https://research.thinkwood.com/en/permalink/catalogue2908
Year of Publication
2021
Topic
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Frames
Shear Walls
Author
Chen, Zhiyong
Popovski, Marjan
Organization
FPInnovations
Year of Publication
2021
Format
Report
Material
CLT (Cross-Laminated Timber)
Application
Frames
Shear Walls
Topic
Seismic
Keywords
Performance
Building Code
Standard
Building Materials
Research Status
Complete
Series
InfoNote
Summary
Mass timber (MT) products, such as Glued Laminated Timber (GLT), Cross Laminated Timber (CLT), Laminated Veneer Lumber (LVL), Nail Laminated Timber (NLT), Dowel Laminated Timber (DLT), Laminated Strand Lumber (LSL), Parallel Strand Lumber (PSL), Mass Plywood Panels (MPP) and others, provide options for developing efficient structural systems to resist gravity and lateral loads. Such systems can be competitive alternatives to their steel and concrete counterparts. This InfoNote briefly introduces the MT Seismic Force Resisting Systems (SFRSs) that will be implemented in the 2020 National Building Code (NBC) of Canada, their height limits, and the main design requirements according to Canadian Standard for Engineering Design in Wood CSA O86-19. Differences among height limits for MT gravity and lateral load resisting systems are also discussed.
Online Access
Free
Resource Link
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Recent Research and Development on Sugi (Japanese Cedar) Structural Glued Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue2100
Year of Publication
2015
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)

Thermal Performance and Apparent Temperature in School Buildings: A Case of Cross-Laminated Timber (CLT) School Development

https://research.thinkwood.com/en/permalink/catalogue2717
Year of Publication
2020
Topic
Energy Performance
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Adekunle, Timothy
Publisher
Elsevier
Year of Publication
2020
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Energy Performance
Keywords
Apparent Temperature
Thermal Performance
Wet-bulb Globe Temperature
Standard Effective Temperature
Universal Thermal Climate Index
School Buildings
Research Status
Complete
Series
Journal of Building Engineering
Summary
This paper examines the performance and apparent temperature in cross-laminated timber (CLT) school buildings. The research presents empirical data on the performance and provides the first set of data on apparent temperature in CLT school buildings. The development is in the New England area of the Northeast of the US. The investigation was conducted in the summertime. The principal aim of the investigation is to evaluate the performance, occupants’ comfort, apparent temperature, and other thermal indices concurrently in CLT school buildings. The research intends to understand if occupants of CLT school buildings are susceptible to thermal stress in summer and assess whether apparent temperatures are consistent with sensation. The study also discusses other indices, practical implications, and applications of the outcomes. To achieve the research aim, the study considered the field measurements of variables. Occupants’ comfort is accessed using the PMV and adaptive methods of various comfort standards. During the survey, the development was occupied from 8am-6pm and partly operated from 7pm-7am. The mean temperatures during the occupied and non-occupied periods varied from 22.1°C-22.4°C. The overall RH was 59.2%. The PMV range and sensation showed the occupants were comfortable. Approximately 80% of the users were satisfied with the thermal environment. The temperatures were within the acceptable bands of ASHRAE-55, CIBSE TM52, and EN16798-1 thermal comfort models. The results showed that the apparent temperatures are consistent with the outcomes of the sensation at different periods. The mean indices ranged from 18.8°C-23.5°C. The study recommends that further research should be conducted on occupants’ comfort and heat indices in school buildings during the first few hours of occupation to understand changes that occupants can make to remove unwanted heat from the thermal environment. The study also recommends that various designers should consider heat stress analyses along with thermal comfort assessment at the design phase to determine possible interventions to improve the thermal environment of schools and other buildings.
Online Access
Free
Resource Link
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10 records – page 1 of 1.