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9 records – page 1 of 1.

Canadian Mass Timber Demonstration Projects Initiatives

https://research.thinkwood.com/en/permalink/catalogue2147
Year of Publication
2019
Topic
Market and Adoption
Application
Wood Building Systems
Author
Mohammad, Mohammad
Tourrilhes, Julie
Coxford, Richard
Williamson, Miranda
Year of Publication
2019
Country of Publication
Canada
Format
Conference Paper
Application
Wood Building Systems
Topic
Market and Adoption
Keywords
High-Rise
Non-Residential
Building Codes
Canada
Tall Wood
Language
English
Conference
Modular and Offsite Construction Summit
Research Status
Complete
Online Access
Free
Resource Link
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CLT Panels Subjected to Combined Out-of-Plane Bending and Compressive Axial Loads

https://research.thinkwood.com/en/permalink/catalogue1729
Year of Publication
2016
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Wang, Jasmine
Mohammad, Mohammad
Di Lenardo, Bruno
Sultan, Mohamed
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Out Of Plane
Bending
Compressive Axial Loads
Canada
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4738-4745
Summary
With the introduction of Cross Laminated Timber (CLT) into North America and gaining popularity it is of interest to the design and code development community to have codified provisions to facilitate the design of CLT structures. This paper addresses the design aspect of CLT panels subjected to combined bending and compressive axial...
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Free
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Design Equations for Dowel Embedment Strength and Withdrawal Resistance for Threaded Fasteners in CLT

https://research.thinkwood.com/en/permalink/catalogue226
Year of Publication
2014
Topic
Connections
Material
CLT (Cross-Laminated Timber)
Author
Kennedy, Shawn
Salenikovich, Alexander
Munoz, Williams
Mohammad, Mohammad
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Connections
Keywords
Embedment Strength
Threaded Fasteners
withdrawal resistance
Lag Screws
Self Drilling Screws
Canada
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The Canadian standard for engineering design in wood (CSA O86) adopted the European yield model for calculations of the lateral resistance of connections with dowel-type fasteners. This model takes into account the yielding resistance of the fastener, the assembly's geometry and the embedment strength of wood. The latter is considered a function of the relative density of wood and diameter of the fastener. The purpose of this study is to verify the significance of these variables as applied to the embedment strength for threaded dowel-type fasteners of diameters 6.4 mm and greater in Canadian glulam products. The importance of this research is justified by the growing interest in the use of large-diameter threaded fasteners in heavy timber and hybrid structures of high load-bearing capacity. Based on the results of 960 tests, a new design model for the embedment strength is proposed for potential implementation in CSA O86 standard and the impact of such a change is presented.
Online Access
Free
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Design Equations for Embedment Strength of Wood for Threaded Fasteners in the Canadian Timber Design Code

https://research.thinkwood.com/en/permalink/catalogue281
Year of Publication
2014
Topic
Connections
Material
Glulam (Glue-Laminated Timber)
Author
Kennedy, Shawn
Salenikovich, Alexander
Munoz, Williams
Mohammad, Mohammad
Sattler, Derek
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Topic
Connections
Keywords
Dowel Type Fastener
Lateral Resistance
Yielding Resistance
Embedment Strength
Canada
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The Canadian standard for engineering design in wood (CSA O86) adopted the European yield model for calculations of the lateral resistance of connections with dowel-type fasteners. This model takes into account the yielding resistance of the fastener, the assembly's geometry and the embedment strength of wood. The latter is considered a function of the relative density of wood and diameter of the fastener. The purpose of this study is to verify the significance of these variables as applied to the embedment strength for threaded dowel-type fasteners of diameters 6.4 mm and greater in Canadian glulam products. The importance of this research is justified by the growing interest in the use of large-diameter threaded fasteners in heavy timber and hybrid structures of high load-bearing capacity. Based on the results of 960 tests, a new design model for the embedment strength is proposed for potential implementation in CSA O86 standard and the impact of such a change is presented.
Online Access
Free
Resource Link
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Design Method for Controlling Vibrations of Wood-Concrete Composite Floors Systems

https://research.thinkwood.com/en/permalink/catalogue1689
Year of Publication
2016
Topic
Acoustics and Vibration
Design and Systems
Mechanical Properties
Material
Timber-Concrete Composite
Application
Floors
Author
Hu, Lin
Cuerrier-Auclair, Samuel
Chui, Ying Hei
Ramzi, Redouane
Gagnon, Sylvain
Mohammad, Mohammad
Ni, Chun
Popovski, Marjan
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Timber-Concrete Composite
Application
Floors
Topic
Acoustics and Vibration
Design and Systems
Mechanical Properties
Keywords
Natural Frequencies
Deflection
Bending Stiffness
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4237-4245
Summary
Wood-concrete composite slab floors provide a promising solution for achieving long spans and shallow wood-based floor systems for large and tall wood buildings. In comparison with conventional wood floor systems, such long span and heavy floors have a lower fundamental natural frequency, which challenges the floor vibration controlled design. A laboratory study, including subjective evaluation and measurement of the natural frequencies and one-kN static deflections, was conducted on wood-concrete composite floors. Method of calculation of the composite bending stiffness of the wood-concrete composite floor is proposed. The design criterion for human comfort was derived from the subjective evaluation results using the calculated fundamental natural frequency and 1 kN static deflection of one meter wide strip of the composite floor. The equation to directly determine the vibration controlled spans from the stiffness and mass was derived. Limited verification was performed. Further verification is needed when more field wood-concrete composite floors become available.
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Free
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Effect of Growth Ring Orientation on the Rolling Shear Properties of Wooden Cross Layer Under Two-Plate Shear Test

https://research.thinkwood.com/en/permalink/catalogue635
Year of Publication
2014
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Zhou, Qinyi
Gong, Meng
Chui, Ying Hei
Mohammad, Mohammad
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Growth Ring Orientation
Rolling Shear Modulus
Rolling Shear Strength
Spruce
Two-plate shear test
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The design and application of cross laminated timber (CLT) is s trongly influenced by rolling shear properties of cross layers. Hence, predicting the mechanical behaviour of CLT requires accurate information about its rolling shear properties. In this study, black spruce wood laminates with three different growth ring orientations (flat sawn, in-between, quarter sawn) were edge glued to produce wooden cross layer (WCL). Two-plate shear tests were carried out on WCL to investigate the influence of growth ring orientation on the rolling shear properties. The experimental results showed that the growth ring orientation had a significant effect on rolling shear modulus of WCL, however, almost no effect on the rolling shear strength. The WCL of in-between end grain had the maximum rolling shear modulus of 89MPa and rolling sh ear strength of 2.13 MPa.
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Free
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Evaluation of the In-Plane Shear Strength of CLT

https://research.thinkwood.com/en/permalink/catalogue637
Year of Publication
2014
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Beams
Author
Gagnon, Sylvain
Mohammad, Mohammad
Munoz, Williams
Popovski, Marjan
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Beams
Topic
Mechanical Properties
Keywords
Canada
In-Plane Shear Strength
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
Several analytical and empirical methods have been developed and adopted in Europe for the determination of shear and bending properties of Cross-laminated Timber (CLT) elements loaded out-of-plane and in-plane. However, proposed evaluation methods for determining in-plane shear strength in CLT elements acting as deep beam or lintels need to be verified on Canadian CLT products. This paper presents results from recent testing program following established ASTM standard methods for evaluating the in-plane shear strength of CLT elements for beam applications. Results indicate that the existing test method applicable to Structural Composite Lumber (SCL) may be suitable for the evaluation of in-plane shear strength of CLT elements.
Online Access
Free
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Failure Modes in CLT Connections

https://research.thinkwood.com/en/permalink/catalogue495
Year of Publication
2014
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Mohammad, Mohammad
Quenneville, Pierre
Salenikovich, Alexander
Zarnani, Pouyan
Munoz, Williams
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Connections
Mechanical Properties
Keywords
Failure Modes
Brittle Behaviour
Canada
New Zealand
Dowels
Bolts
Rivets
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
Information on ductile and brittle failure modes is critical for proper design of timber connections in Crosslaminated Timber (CLT). While considerable research has been conducted in Europe and Canada on the ductile performance of connections in CLT, little is known about the brittle behaviour. This paper presents new information from testing programs and analysis performed in Canada and in New Zealand on the brittle performance of dowel-type fasteners in CLT. The testing programs have been designed to trigger brittle failure modes based on minimum end distances and fasteners spacings specified in the Canadian timber design standard. Timber rivets and bolts/dowels are covered under this study. At the time of writing of this abstract, the testing program is advancing and results will be available at the time of paper submission.
Online Access
Free
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Introduction to Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue705
Year of Publication
2012
Topic
General Information
Market and Adoption
Material
CLT (Cross-Laminated Timber)
Author
Mohammad, Mohammad
Gagnon, Sylvain
Douglas, Bradford
Podesto, Lisa
Publisher
Forest Products Society
Year of Publication
2012
Country of Publication
United States
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
General Information
Market and Adoption
Keywords
North America
Language
English
Research Status
Complete
Series
Wood Design Focus
Summary
Cross-laminated timber (CLT), a new generation of engineered wood product developed initially in Europe, has been gaining popularity in residential and non-residential applications in several countries. Numerous impressive low- and mid-rise buildings built around the world using CLT showcase the many advantages that this product can offer to the construction sector. This article provides basic information on the various attributes of CLT as a product and as structural system in general, and examples of buildings made of CLT panels. A road map for codes and standards implementation of CLT in North America is included, along with an indication of some of the obstacles that can be expected.
Online Access
Free
Resource Link
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9 records – page 1 of 1.