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119 records – page 1 of 12.

Advancing Knowledge of Mid-ply Shear Walls: Mid-Ply Shear Wall Fire Resistance Testing

https://research.thinkwood.com/en/permalink/catalogue2808
Year of Publication
2021
Topic
Fire
Material
Light Frame (Lumber+Panels)
Application
Shear Walls
Author
Ranger, Lindsay
Dagenais, Christian
Organization
FPInnovations
Year of Publication
2021
Country of Publication
Canada
Format
Report
Material
Light Frame (Lumber+Panels)
Application
Shear Walls
Topic
Fire
Keywords
Shear Walls
Fire Resistance Rating
Mid-Rise
Midply Wall
Language
English
Research Status
Complete
Summary
The objective of this research is to address a knowledge gap related to fire performance of midply shear walls. Testing has already been done to establish the structural performance of these assemblies. To ensure their safe implementation and their broad acceptance, this project will establish fire resistance ratings for midply shear walls. Fire tests will provide information for the development of design considerations for midply shear walls and confirm that they can achieve at least 1-hour fire-resistance ratings that are required for use in mid-rise buildings. This research will support greater adoption of mid-rise residential and non-residential wood-frame construction and improve competition with similar buildings of noncombustible construction. This work will also support the development of the APA system report for midply walls, which will be a design guideline for using midply walls in North America.
Online Access
Free
Resource Link
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Alternative Load Path Analyses for Mid-Rise Post and Beam Mass Timber Building

https://research.thinkwood.com/en/permalink/catalogue2448
Year of Publication
2020
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Columns
Beams

Analyse de Performance Acoustique et de Résistance au Feu

https://research.thinkwood.com/en/permalink/catalogue2752
Year of Publication
2018
Topic
Acoustics and Vibration
Fire
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Organization
Société en commandite NEB
Year of Publication
2018
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Topic
Acoustics and Vibration
Fire
Keywords
Origine
Fire Resistance
Acoustic Performance
Tall Timber
Multi-Storey
Language
French
Research Status
Complete
Summary
Le présent rapport décrit une partie des activités de recherche et développement (R&D) en lien avec la démonstration de la résistance au feu ainsi que les études sur la performance acoustique effectuées dans le cadre de la construction du bâtiment Origine. Ce bâtiment est la tour résidentielle en bois massif la plus haute au Québec. Sa réalisation a débuté en 2015 à la suite des analyses préliminaires de faisabilité technique-économique qui se sont étalées pendant toute l’année 2014. La construction et l’installation se sont finalisées vers la fin de 2017. En premier lieu, le rapport présente les démarches liées à la réalisation d’un exercice de démonstration d’incendie pour une cage d’escaliers/ascenseur avec une chambre d’habitation adjacente, l’analyse de résultats et les principales conclusions en lien avec la pertinence de l’utilisation du bois massif pour des édifices de grande hauteur. En ce qui concerne la performance acoustique, le rapport présente la méthodologie d’étude et d’analyse des résultats des tests acoustiques pour des assemblages de mur et de plancher utilisés dans le projet Origine. De plus, ce rapport facilite la compréhension des activités réalisées et permet de montrer objectivement la capacité des produits en bois massif à offrir un environnement sécuritaire et confortable aux occupants de bâtiments multi-étagés. Les principaux résultats indiquent que les cages d’escaliers/ascenseur faites en bois massif, conçues pour une résistance au feu équivalente à celle faites en béton, peuvent offrir une excellente performance et servent d’alternatives adéquates pour les bâtiments multi-étagés. En ce qui concerne le développement d’assemblages acoustiques pour les murs et les planchers en bois massif, il a été prouvé qu’une approche multicritère permet d’offrir des solutions performantes à des coûts raisonnables. Finalement, il est clair que ce projet constitue un jalon très important dans le chemin d’acceptation des bâtiments multi-étagés en bois massif au Québec et au Canada. Sa construction, faite presque entièrement en bois, a nécessité de nombreux efforts économiques, de R&D, de conception et d’installation. De plus, les activités réalisées pour l’acceptation de ce type de construction ont permis de mettre en place de nouvelles technologies et des techniques de conception qui faciliteront la réplication de ce type de projet partout en Amérique du Nord.
Online Access
Free
Resource Link
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Analysis of Cross-Laminated Timber Charring Rates Upon Exposure to Non-Standard Heating Conditions

https://research.thinkwood.com/en/permalink/catalogue136
Year of Publication
2015
Topic
Fire
Material
CLT (Cross-Laminated Timber)
Author
Bartlett, Alastair
Hadden, Rory
Bisby, Luke
Law, Angus
Organization
Fire and Materials
Year of Publication
2015
Country of Publication
United States
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Fire
Keywords
Charring Rate
Heat Release Rate
Fire Resistance
Language
English
Conference
Fire and Materials 2015
Research Status
Complete
Notes
February 2-4, 2015, San Francisco, United States
Summary
The use of engineered timber products such as cross-laminated timber (CLT) is of increasing interest to architects and designers due to their desirable aesthetic, environmental, and structural properties. A key factor preventing widespread uptake of these materials is the uncertainty regarding their performance in fire. Currently, the predominant approach to quantifying the structural fire resistance of timber elements is the charring rate, which allows estimation of residual cross-section and hence strength. The charring rate is usually determined by testing timber specimens in a furnace by exposure to a ‘standard fire’. However, it is recognized that the resulting charring rates are not necessarily appropriate for non-standard fire exposures or for characterizing the structural response in a real timber building. The effect of heating rate on the charring rate of CLT samples is investigated. The charring rate resulting from three heating scenarios (constant, simulated ‘standard fire’ and quadratically increasing) was calculated using interpolation of in-depth temperature measurements during exposure to heating from a mobile array of radiant panels, or in a Fire Propagation Apparatus (FPA). Charring rate is shown to vary both spatially and temporally, and as a function of heating rate within the range 0.36–0.79 mm/min. The charring rate for tests carried out under simulated ‘standard fire’ exposures were shown to agree with the available literature, thus partially verifying the new testing approach; however under other heating scenarios the Eurocode charring rate guidance was found to be unconservative for some of the heat flux exposures in this study. A novel charring rate model is presented based on the experimental results. The potential implications of this study for structural fire resistance analysis and design of timber structures are discussed. The analysis demonstrates that heating rate, sample size and orientation, and test setup have significant effects on charring rate and the overall pyrolysis, and thus need to be further evaluated to further facilitate the use of structural timber in design.
Online Access
Free
Resource Link
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Analysis of Full-Scale Fire-Resistance Tests of Structural Composite Lumber Beams

https://research.thinkwood.com/en/permalink/catalogue366
Year of Publication
2014
Topic
Fire
Material
LSL (Laminated Strand Lumber)
LVL (Laminated Veneer Lumber)
PSL (Parallel Strand Lumber)
Application
Beams
Author
Dagenais, Christian
Organization
FPInnovations
Year of Publication
2014
Country of Publication
Canada
Format
Report
Material
LSL (Laminated Strand Lumber)
LVL (Laminated Veneer Lumber)
PSL (Parallel Strand Lumber)
Application
Beams
Topic
Fire
Keywords
Encapsulation
Type X Gypsum Board
Fire Resistance
Full Scale
Language
English
Research Status
Complete
Summary
The key objective of this study is to analyze full-scale fire-resistance tests conducted on structural composite lumber (SCL), namely laminated veneer lumber (LVL), parallel strand lumber (PSL) and laminated strand lumber (LSL). A sub-objective is to evaluate the encapsulation performance of Type X gypsum board directly applied to SCL beams and its contribution to fire-resistance of wood elements. The test data is being used to further support the applicability of the newly developed Canadian calculation method for mass timber elements, recently implemented as Annex B of CSA O86-14.
Online Access
Free
Resource Link
Less detail

Assessing the Fire Integrity Performance of Cross-Laminated Timber Floor Panel-To-Panel Joints

https://research.thinkwood.com/en/permalink/catalogue185
Year of Publication
2016
Topic
Connections
Fire
Material
CLT (Cross-Laminated Timber)
Application
Floors
Author
Dagenais, Christian
Organization
Carleton University
Year of Publication
2016
Country of Publication
Canada
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Floors
Topic
Connections
Fire
Keywords
Finite Element Model
Thickness
Codes
Panel-to-Panel
Joints
Canada
US
Fire Resistance
Language
English
Research Status
Complete
Summary
During the past few years, a relatively new technology has emerged in North America and changed the way professionals design and build wood structures: Cross-laminated Timber (CLT). CLT panels are manufactured in width ranging from 600 mm to 3 m. As such, fastening them together along their major strength axis is required in order to form a singular structural assembly resisting to in-plane and out-of-plane loading. Typical panel-to-panel joint details of CLT assemblies may consist of internal spline(s), single or double surface splines or half-lapped joints. These tightly fitted joint profiles should provide sufficient fire-resistance, but have yet to be properly evaluated for fire-resistance in CLT assemblies. The experimental portion of the study consisted at conducting ten (10) intermediate-scale fire-resistance tests of CLT floor assemblies with four (4) types of panel-to-panel joints and three (3) CLT thicknesses. The data generated from the intermediate-scale fire tests were used to validate a finite element heat transfer model, a coupled thermal-structural model and a simplified design model. The latter is an easy-to-use design procedure for evaluating the fire integrity resistance of the four commonly-used CLT floor assemblies and could potentially be implemented into building codes and design standards. Based on the test data and models developed in this study, joint coefficient values were derived for the four (4) types of CLT panel-to-panel joint details. Joint coefficients are required when assessing the fire integrity of joints using simple design models, such as the one presented herein and inspired from Eurocode 5: Part 1-2. The contribution of this study is to increase the knowledge of CLT exposed to fire and to facilitate its use in Canada and US by complementing current fire-resistance design methodologies of CLT assemblies, namely with respect to the fire integrity criterion. Being used as floor and wall assemblies, designers should be capable to accurately verify both the load-bearing and separating functions of CLT assemblies in accordance with fire-related provisions of the building codes, which are now feasible based on the findings of this study.
Online Access
Free
Resource Link
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Basis of Design - Performance-Based Design and Structural CD Drawings for Framework Office Building in Portland, OR

https://research.thinkwood.com/en/permalink/catalogue1827
Year of Publication
2017
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Organization
KPFF Consulting Engineers
Year of Publication
2017
Country of Publication
United States
Format
Report
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Keywords
Structural
Wind Load
Sustainability
Reliability
Seismic
Earthquake Resistance
Serviceability
Design
Language
English
Research Status
Complete
Series
Framework: An Urban + Rural Design
Notes
Document includes 100% CD construction drawings
Summary
This document outlines the basis of design for the performance-based design and nonlinear response history analysis of the Framework Project in Portland, OR. Performance-based design is pursued for this project because the proposed lateral force-resisting system, consisting of post-tensioned rocking cross-laminated timber (CLT) walls is not included in ASCE/SEI 7-10 Table 12.2-1.
Online Access
Free
Resource Link
Less detail

Bending Beams Made of Cross Laminated Timber with Load in Board Plane

https://research.thinkwood.com/en/permalink/catalogue1143
Year of Publication
2013
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Beams
Author
Flaig, Marcus
Organization
Karlsruher Institut für Technologie
Year of Publication
2013
Country of Publication
Germany
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Beams
Topic
Mechanical Properties
Keywords
bending resistance
Shear Load Capacity
Deformations
Language
German
Research Status
Complete
Summary
In der vorliegenden Arbeit wurden die Anwendungsmöglichkeiten von Biegeträgern aus Brettsperrholz bei Beanspruchung in Plattenebene untersucht. Mit Hilfe numerischer und analytischer Methoden wurden die für die Bemessung von Brettsperrholzträgern erforderlichen Ansätze für den Nachweis der Biege- und der Schubtragfähigkeit sowie zur Berechnung der Verformungen entwickelt und hergeleitet.
Online Access
Free
Resource Link
Less detail

Bending Resistance and Deformation Capacity of Fibre Reinforced Glulam Beams

https://research.thinkwood.com/en/permalink/catalogue2208
Year of Publication
2018
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Blank, Lukas
Organization
ETH Zurich
Year of Publication
2018
Country of Publication
Switzerland
Format
Report
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Mechanical Properties
Keywords
Bending Resistance
Deformation Capacity
Ultimate Load
Fibre Reinforcement
Language
English
Research Status
Complete
Series
IBK Bericht
Online Access
Free
Resource Link
Less detail

Butt-Joint Bonding of Timber as a Key Technology for Point-Supported, Biaxial Load Bearing Flat Slabs Made of Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue2466
Year of Publication
2019
Topic
Mechanical Properties
Connections
Material
CLT (Cross-Laminated Timber)
Author
Zöllig, Stefan
Muster, Marcel
Themessl, Adam
Publisher
IOP Publishing Ltd
Year of Publication
2019
Country of Publication
United Kingdom
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Connections
Keywords
Butt-Joint
Bending Strength
Shear Resistance
Language
English
Research Status
Complete
Series
IOP Conference Series: Earth and Environmental Science
Online Access
Free
Resource Link
Less detail

119 records – page 1 of 12.