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Advanced wood-based solutions for mid-rise and high-rise construction: analytical models for balloon-type CLT shear walls

https://library.fpinnovations.ca/en/permalink/fpipub52680
Author
Chen, Zhiyong
Cuerrier-Auclair, Samuel
Popovski, Marjan
Date
July 2018
Material Type
Research report
Field
Sustainable Construction
: Performance of Platform and Balloon Types of CLT Buildings ACKNOWLEDGEMENTS This project
Author
Chen, Zhiyong
Cuerrier-Auclair, Samuel
Popovski, Marjan
Contributor
Natural Resources Canada. Canadian Forest Service
Date
July 2018
Material Type
Research report
Physical Description
83 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Cross Laminated Timber
Performance
Building construction
Building materials
Energy
Language
English
Abstract
Lack of research and design information for the seismic performance of balloon-type CLT shear walls prevents CLT from being used as an acceptable solution to resist seismic loads in balloon-type mass-timber buildings. To quantify the performance of balloon-type CLT structures subjected to lateral loads and create the research background for future code implementation of balloon-type CLT systems in CSA O86 and NBCC, FPInnovations initiated a project to determine the behaviour of balloon-type CLT construction. A series of tests on balloon-type CLT walls and connections used in these walls were conducted. Analytical models were developed based on engineering principles and basic mechanics to predict the deflection and resistance of the balloon-type CLT shear walls. This report covers the work related to development of the analytical models and the tests on balloon-type CLT walls that the models were verified against.
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Advanced wood-based solutions for mid-rise and high-rise construction: modelling of timber connections under force and fire

https://library.fpinnovations.ca/en/permalink/fpipub49851
Author
Chen, Zhiyong
Ni, Chun
Dagenais, Christian
Date
March 2018
Material Type
Research report
Field
Sustainable Construction
of computer models for use in performance-based design for wood buildings, in particular, seismic and fire
Author
Chen, Zhiyong
Ni, Chun
Dagenais, Christian
Contributor
Natural Resources Canada. Canadian Forest Service
Date
March 2018
Material Type
Research report
Physical Description
85 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Cross Laminated Timber
Fire
Performance
Timber
Language
English
Abstract
FPInnovations carried out a survey with consultants and researchers on the use of analytical models and software packages related to the analysis and design of mass timber buildings. The responses confirmed that a lack of suitable models and related information for material properties of timber connections, in particular under combination of various types of loads and fire, was creating an impediment to the design and construction of this type of buildings. Furthermore, there is currently a lack of computer models for use in performance-based design for wood buildings, in particular, seismic and fire performance-based design. In this study, a sophisticated constitutive model for wood-based composite material under stress and temperature was developed. This constitutive model was programmed into a user-subroutine and can be added to most general-purpose finite element software. The developed model was used to model the structural performance of a laminated veneer lumber (LVL) beam and a glulam bolted connection under force and/or fire. Compared with the test results, it shows that the developed model was capable of simulating the mechanical behaviour of LVL beam and glulam connection under load and/or fire with fairly good correlation. With this model, it will allow structural designers to obtain the load-displacement curve of timber connections under force, fire or combination of the two. With this, key design parameters such as capacity, stiffness, displacement and ductility, which are required for seismic or fire design, can be obtained. It is recommended that further verification and calibration of the model be conducted on various types of wood products, such as CLT, glulam, SCL and NLT, and fasteners, e.g. screw and rivet. Moreover, a database of the thermal and structural properties of the wood members and fasteners that are commonly used in timber constructions need to be developed to support and facilitate the application of the model.
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Advanced Wood-based Solutions for Mid-rise and High-rise Construction: Structural Performance of Post-Tensioned CLT Shear Walls with Energy Dissipators

https://library.fpinnovations.ca/en/permalink/fpipub49859
Author
Chen, Zhiyong
Popovski, Marjan
Symons, Paul D.
Date
May 2018
Material Type
Research report
Field
Sustainable Construction
Advanced Wood-based Solutions for Mid-rise and High-rise Construction: Structural Performance
Author
Chen, Zhiyong
Popovski, Marjan
Symons, Paul D.
Contributor
Natural Resources Canada. Canadian Forest Service
Date
May 2018
Material Type
Research report
Physical Description
117 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Cross Laminated Timber
Performance
Building construction
Building materials
Energy
Language
English
Abstract
The latest developments in seismic design philosophy have been geared towards developing of so called "resilient" or "low damage" innovative structural systems that can reduce damage to the structure while offering the same or higher levels of safety to occupants. One such innovative structural system is the Pres-Lam system that is a wood-hybrid system that utilizes post-tensioned (PT) mass timber components in both rigid-frame and wall-based buildings along with various types of energy disspators. To help implement the Pres-Lam system in Canada and the US, information about the system performance made with North American engineered wood products is needed. That information can later be used to develop design guidelines for the designers for wider acceptance of the system by the design community. Several components influence the performance of the Pres-Lam systems: the load-deformation properties of the engineered wood products under compression, load-deformation and energy dissipation properties of the dissipators used, placement of the dissiaptors in the system, and the level of post-tensioning force. The influence of all these components on the performance of Pres-Lam wall systems under gravity and lateral loads was investigated in this research project. The research project consisted on two main parts: material tests and system tests. In the material tests part of the program, a total of 110 compression tests were conducted to determine the load-deformation properties of four different engineered wood products (LVL, LSL, Glulam and CLT) in various directions. The LVL, LSL and Glulam specimens tested under compression parallel to grain had similar linear elastic behaviour with limited ductility. The CLT specimens tested under compression in the major-axis direction had linear elastic behaviour with moderate plasticity. Depending on the type of engineered wood product, typical failure modes included crushing, shear, wedge split and splitting. The compressive strength of the products tested ranged from 42.1 to 53.5 MPa, the global MOE (of the entire specimen under compression) varied between 6390 and 9554 MPa, the local (near the crushing surface) MOE parallel to grain was in the range of 2211 to 5090 MPa, while the local to global MOE ratio ranged from 29.2 to 58.0%, and was higher with the increase in the oven-dry density. The specimens of the four different engineered wood products tested under compression perpendicular to grain or in the minor-axis direction had elastic-plastic behaviour with a clearly defined plastic plateau. Crushing (densification) of the fibres perpendicular to grain was the main failure mode for all specimens, and was in some cases followed by in-plane shear failure or cracking perpendicular to grain. Compression parallel to grain in the middle layer that was followed by its delamination and buckling was a unique failure mode for CLT specimens tested under compression in the minor strength direction. The compressive strength of the engineered wood products tested were in the range of 4.8 to 27.8 MPa, while the global and local MOE perpendicular to grain were in the range of 244 to 2555 MPa, and 320 to 1726 MPa, respectively. The compressive strength and global MOE perpendicular to grain increased with an increase in the oven-dry density. The results show no well-defined trend for the local MOE perpendicular to grain. The specimens loaded in the centre perpendicular to grain had higher strength, global and local MOE than those loaded at the end. A convenient and timesaving design for the axial energy dissipators (fuses) was developed by replacing the epoxy in the original design with two half-tubes. Compared to the original design of fuses with epoxy, the new design with two half-tubes had similar necking failure mode and a longer failure displacment, thus providing user-friendly fuses that performed similar or even better than the original design. In the system tests part of the program, a total of 17 different PT and Pres-Lam CLT walls with six different configurations were tested under monotonic and reversed cyclic loading. The studied parameters included the level of PT force, the position of the fuses, and the number of UFPs. CLT shear walls subjected only to post-tensioning, had non-linear elastic behaviour. The behaviour of the PT walls with and without energy dissipators was relatively similar under monotonic and cyclic loading. The strength degradation observed during the cyclic tests was low in all wall configurations suggesting that very little damage was inflicted upon the structure during the first cycles at any deformation level. Four major failure modes, including yielding and buckling of fuse, crushing and splitting of wood at the end of wall, and buckling of lumber in the exterior-layer of CLT wall, were observed in the tests. The yielding in fuses occurred at the early stage of loading as designed and the other failure modes happened when the lateral drift reached or beyond 2.5%. The initial stiffness of the single-panel PT CLT walls tested ranged from 1.80 to 2.31 kN/mm, the load at the decompression point and 2.5% drift were in the range of 4.2 to 14.9 kN and 32.7 to 45.9 kN, respectively. The initial stiffness of the single-panel Pres-Lam CLT walls tested ranged from 1.69 to 2.44 kN/mm, the load at the decompression point and 2.5% drift were in the range of 21.0 to 30.2 kN and 59.6 to 69.8 kN, respectively. All the mechanical properties increased with an increase in the PT force. The average initial stiffness and the load at 2.5% drift of the coupled-panel Pres-Lam CLT walls tested were 4.59 kN/mm and 151.3 kN, respectively, while the load at the decompression point increased from 58.4 to 69.7 kN by increasing the number of UFP. The test results show that the behaviour of the Pre-Lam CLT shear walls can be de-coupled and a “superposition rule” can be applied to obtain the stiffness and resistance of such system. The test results gave a valuable insight into the structural behaviour of the PT and Pres-Lam CLT shear wall under in-plane lateral loads. The data from the testing will be used in the future for development of numerical computer models. They will also be used for development of design guidelines for this system. All tests conducted in this study and the analyses in the future modelling research will form the basis for developing future design guidelines for PT and Pres-Lam mass timber systems.
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Analyse des coûts de possession et de fonctionnement de camions grumiers équipés de systèmes CTI ou TPCS

https://library.fpinnovations.ca/en/permalink/fpipub3622
Author
Jokai, Rob
Bradley, Allan
Date
March 2001
Edition
40333
Material Type
Research report
Field
Fibre Supply
Author
Jokai, Rob
Bradley, Allan
Date
March 2001
Edition
40333
Material Type
Research report
Physical Description
17 p
Sector
Forest Operations
Field
Fibre Supply
Research Area
Transportation & Infrastructure
Subject
Tires
Systems
Pressure
Performance
Trucks
Advantage
Series Number
Avantage ; Vol. 1, No. 30
Language
French
Abstract
Camions grumiers
Systèmes de gonflage central des pneus
Système de contrôle de la pression des pneus (TPCS)
Coûts
Performance
Abstract
Les systèmes de contrôle de pression (TPCS) ou de gonflement central des pneus (CTI) deviennent de plus en plus populaires dans les opérations forestières canadiennnes comme moyen d'accroître la mobilité des camions grumiers et de prolonger la saison de transport. Cependant, il existe très peu d'information quant à leurs coûts de possession et de fonctionnement. FERIC a observé les systèmes TPCS Redline-Eltek et TPCS Eaton durant une période de trois ans. L'étude portait sur 24 camions grumiers de configurations variées, localisés dans six endroits différents de l'ouest du Canada. Le rapport présente les coûts de possession et de fonctionnement des systèms TPCS pour ces 24 camions et décrit comment le taux d'utilisation du camion affecte les coûts de possession du TPCS et du camion.
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Assessing the flammability of mass timber components, a review

https://library.fpinnovations.ca/en/permalink/fpipub53026
Author
Mehaffey, J.R. (Jim)
Dagenais, Christian
Date
February 2014
Material Type
Research report
Field
Sustainable Construction
and Fire Performance FPInnovations February 2014 Assessing
Author
Mehaffey, J.R. (Jim)
Dagenais, Christian
Date
February 2014
Material Type
Research report
Physical Description
27 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Building code
Fire
Performance
Design
Timber
Language
English
Abstract
The report concludes with the recommendation that it would be useful to run an extensive set of cone calorimeter tests on SCL, glue-laminated timber and CLT products. The fundamental data could be most useful for validating models for predicting flame spread ratings of massive timber products and useful as input to comprehensive computer fire models that predict the course of fire in buildings. It is also argued that the cone calorimeter would be a useful tool in assessing fire performance during product development and for quality control purposes.
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Canadian waferboard symposium: 1982

https://library.fpinnovations.ca/en/permalink/fpipub1690
Contributor
Forintek Canada Corp.
Date
January 1984
Edition
38204
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Contributor
Forintek Canada Corp.
Date
January 1984
Edition
38204
Material Type
Research report
Physical Description
273 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Waferboards
Performance
Canada
Series Number
Special Publication SP-508E
E-705
Location
Ottawa, Ontario
Language
English
ISBN
ISBN-0-86488-508-1
Abstract
Proceedings of the Canadian waferboard symposium. Waferboard can be regarded as a successful structural panel in the recent history of wood products. To recognize this, the Waferboard symposium series concept was first initiated in 1980. The second Waferboeard symposium - held from June 1- 3 1982 - based its program on a critical review of the first meeting. The sessions covered the following subjects: Process and manufacture; Product standard and markets; Adhesive technology; Product performance; Resource potential; Equipment up-date.
Waferboard - Congresses
Composite Board
Waferboard - Manufacture
Waferboard - Structural Performance
Forintek Canada Corp. - Publications
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Les Chapes de béton et l'humidité emprisonnée dans le bois lamellé-croisé pendant la construction

https://library.fpinnovations.ca/en/permalink/fpipub7796
Author
Wang, Jieying
Date
Octobre 2020
Material Type
Research report
Field
Sustainable Construction
. Vancouver, Canada. Wang, J.Y. 2018. Wetting and drying performance related to on-site moisture management
Author
Wang, Jieying
Contributor
Natural Resources Canada. Canadian Forest Service
Forestry Innovation Investment
Date
Octobre 2020
Material Type
Research report
Physical Description
3 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Building systems
Subject
Concrete
Construction
Cross-Laminated Timber (CLT)
Moisture
Drying
Performance
Water repellents
Series Number
InfoNote 2020 n.9
Language
French
Abstract
FPInnovations a effectué un essai en laboratoire afin d’étudier la teneur en humidité (TH) du bois lamellé-croisé (CLT) découlant du coulage de chapes de béton, et l’efficacité avec laquelle un enduit imperméabilisant et une membrane permettent de de prévenir cette humidification.
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InfoNote2020N9F.pdf

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Comparaison de la performance de dispositifs d'aide à la traction pour trains routiers de type B

https://library.fpinnovations.ca/en/permalink/fpipub40762
Author
Williams, W.A.
Date
May 1995
Material Type
Research report
Field
Fibre Supply
Author
Williams, W.A.
Date
May 1995
Material Type
Research report
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Transportation & Infrastructure
Subject
Tires
Training
Systems
Trailers
Performance
Trucks
Series Number
Communiqué technique ; Chargement & camionnage-CT-000039
Language
French
Abstract
Ensembles camion-remorque, TRAINS ROUTIERS DE TYPE B, SYSTEMES D'AIDE A LA TRACTION, Performance, PIVOTS D'ATTELAGE
SELLETTE D'ATTELAGE
ESSIEUX RELEVABLES
DISPOSITIFS D'AIDE A LA TRACTION
SYSTÉME CENTRAL DE CONTROLE DU GONFLEMENT DES PNEUS
DIFFÉRENTIELS AUTOBLOQUANTS
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Concrete topping and construction moisture on cross-laminated timber

https://library.fpinnovations.ca/en/permalink/fpipub7795
Author
Wang, Jieying
Date
October 2020
Material Type
Research report
Field
Sustainable Construction
. Wang, J.Y. 2018. Wetting and drying performance related to on-site moisture management of cross
Author
Wang, Jieying
Contributor
Natural Resources Canada. Canadian Forest Service
Forestry Innovation Investment
Date
October 2020
Material Type
Research report
Physical Description
2 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Building systems
Subject
Concrete
Construction
Cross-Laminated Timber (CLT)
Moisture
Drying
Performance
Water repellents
Series Number
InfoNote 2020 n.9
Language
English
Abstract
FPInnovations conducted a laboratory test to investigate the potential wetting of cross-laminated timber (CLT) from the pouring of concrete topping, and the effectiveness of a water repellent coating and membrane in preventing such wetting.
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InfoNote2020N9E.pdf

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Construction moisture management, cross laminated timber

https://library.fpinnovations.ca/en/permalink/fpipub53068
Author
Wang, Jieying
Date
September 2020
Material Type
Research report
Field
Sustainable Construction
, apply in the factory an end sealer with proven performance on edges and pre-made cuts to reduce water
Author
Wang, Jieying
Contributor
Natural Resources Canada. Canadian Forest Service
Forestry Innovation Investment
Date
September 2020
Material Type
Research report
Physical Description
5 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Building systems
Subject
Wetting
Drying
Performance
Water repellents
Series Number
InfoNote 2020 n.8
Language
English
Abstract
Cross-Laminated Timber (CLT) is an engineered mass timber product manufactured by laminating dimension lumber in layers with alternating orientation using structural adhesives. It is intended for use under dry service conditions and is commonly used to build floors, roofs, and walls. Because prolonged wetting of wood may cause staining, mould, excessive dimensional change (sometimes enough to fail connectors), and even result in decay and loss of strength, construction moisture is an important consideration when building with CLT. This document aims to provide technical information to help architects, engineers, and builders assess the potential for wetting of CLT during building construction and identify appropriate actions to mitigate the risk.
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InfoNote2020N8E.pdf

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115 records – page 1 of 12.