Behavior of Cross-Laminated Timber Diaphragm Panel-to-Panel Connections with Self-Tapping Screws
https://ir.library.oregonstate.edu/concern/graduat... [Connectors] [Thesis/Dissertation] 2017
Kyle Sullivan
The goal of this project is to contribute to the development of design values for cross-laminated timber (CLT) diaphragms in the seismic load-resisting system for buildings. Monotonic and cyclic tests to determine strength and stiffness characteristics of 2.44 m (8 ft) long shear connections with common self-tapping screws were performed. Understanding and quantifying the behavior of these shear connections will aid in developing design provisions in the National Design Specification for Wood Co...

Cross-Laminated Timber in the U.S.: Potential Adopter Perceptions
http://www.forestprod.org/knowledge_base/demo2.0/M... [Markets] [Journal Article] 2016
Maria Fernanda Laguarda Mallo, Omar Espinoza
Cross-laminated timber (CLT) is an innovative structural system based on the use of large-format, multi-layered panels made from solid wood boards glued together alternating the direction of their fibers. This crosslaminated configuration improves rigidity, dimensional stability, and mechanical properties of the panels, which can be used for many applications such as walls, floors, and roofs....

CLT Handbook - US Edition
https://www.thinkwood.com/products-and-systems/clt... [General Information] [Book/Book Section] 2013
Binational Softwood Lumber Council, FPInnovations
The US edition of the CLT Handbook is a 572 page guide and is the definitive handbook on cross-laminated timber (CLT) and covers manufacturing, structural design, connections, fire and environmental performance, and the lifting and handling of CLT elements....

Framework - An Urban + Rural Ecology - Acoustic Testing and Wood Supply
https://research.thinkwood.com/en/permalink/catalo... [Vibration/Acoustic Performance] [Report] 2017
ARUP, StructureCraft, InterTek
3/8/2019 Acoustic Testing and Wood Supply for Framework Office Building in Portland, OR | Research Library | Think Woodhttps://research.thinkwood.com/en/permalink/catalogue1830 1/2(/en) YOUR SELECTIONS: 0 ITEMS (/EN/SELECTIONS? BACK=%2FEN%2FPERMALINK%2FCATALOGUE1830)research library (/en) (/en/print? q=id:catalogue1830&p=1&ps=1&action=list) (/en/pdf? q=id:catalogue1830&p=1&ps=1&action=list) Acoustic Testing and Wood Supply for Framework OfficeBuilding in Portland, ORYear of Publication: 201...

Fire Safety Challenges of Tall Wood Buildings - Phase 2: Task 5 – Experimental Study of Delamination of Cross Laminated Timber (CLT) in Fire
https://www.nfpa.org/News-and-Research/Data-resear... [Fire Performance] [Report] 2018
Daniel Brandon, Christian Dagenais
Recent architectural trends include the design and construction of tall buildings with visible structural members comprised of mass timber. Cross-laminated timber (CLT) is such a material and is increasingly used for tall buildings because of a combination of advantages regarding its structural performance, low environmental impact and more. As timber is a combustible material, CLT can become involved in the fire at locations where it is not protected against the fire. In that case, the CLT cont...

Bending Behavior of Regularly Spaced CLT Panels
https://www.researchgate.net/publication/303707003... [Mechanical Performance] [Conference Paper] 2016
Lorenzo Franzoni, Arthur Lebée, Florent Lyon, Gilles Forêt
Cross Laminated Timber (CLT) floors or roofs have well-established advantages which lead to an increasing application in massive timber construction. With the recent development of high-rise timber buildings, CLT panels having spaced voids can lead to lighter and more acoustically efficient floors. However, such voids can decrease the bending performance and increase shear effects. In the present paper, results from an experimental campaign at the structure and material scales are first presente...

Effects of Component Ratio of the Face and Core Laminae on Static Bending Strenght Performance of Three-Ply Cross-Laminated Wood Panels with Sugi (Cryptomeria Japonica)
https://wfs.swst.org/index.php/wfs/article/view/16... [Raw Materials] [Journal Article] 2006
Han-Min Park, Masami Fushitani
In order to improve the bending strength performance of three-ply laminated wood panels and use them as construction-grade panel materials, twelve types of three-ply cross-laminated wood panels whose percentages of core lamina thickness versus total lamina thickness were 33%, 50%, and 80% were made with sugi (Japanese cedar), and the effect of component ratio of the face and core laminae on their static bending strength performance was investigated. The moduli of elasticity (MOE), proportional l...

Design Equations for Dowel Embedment Strength and Withdrawal Resistance for Threaded Fasteners in CLT
https://www.researchgate.net/publication/269710908... [Connectors] [Conference Paper] 2014
Shawn Kennedy, Alexander Salenikovich, Williams Munoz, Mohammad Mohammad
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 assemblys 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 th...

Mechanical Properties of Cross-Laminated Timber of Different Species
http://www.cnki.com.cn/Article/CJFDTOTAL-ZNLB20141... [Raw Materials] [Journal Article] 2014
Zhiqiang Wang, Hongmei Fu, Xiaohan Dai
The use of Douglas fir, radiata pine and poplar wood, the poplar wood is placed in the core layer, Douglas fir or radiata pine is placed on the surface layer, and the single-tree and mixed tree species are cross-laminated timber (CLT). The material was tested for the anti-bending, anti-scratch and cross-grain shear properties of the material. The test shows that the performance of mixed CLT of Douglas fir and poplar is increased by 35% compared with the pure poplar CLT with the lowest flexural m...

Performance of Cross-Laminated Timber Shear Walls for Platform Construction Under Lateral Loading
https://open.library.ubc.ca/cIRcle/collections/ubc... [Seismic Performance] [Thesis/Dissertation] 2018
Md Shahnewaz
Cross-laminated timber (CLT) is gaining popularity in residential and non-residential applications in the North American construction market. CLT is very effective in resisting lateral forces resulting from wind and seismic loads. This research investigated the in-plane performance of CLT shear wall for platform-type buildings under lateral loading. Analytical models were proposed to estimate the in-plane stiffness of CLT wall panels with openings based on experimental and numerical investigatio...

Energy Based Seismic Design of a Multi-Storey Hybrid Building: Timber-Steel Core Walls
https://open.library.ubc.ca/cIRcle/collections/ubc... [Seismic Performance] [Thesis/Dissertation] 2016
Caleb Goertz
This thesis discusses a novel timber-steel core wall system for use in multi-storey buildings in high seismic regions. This hybrid system combines Cross Laminated Timber (CLT) panels with steel plates and connections to provide the required strength and ductility to core walled buildings. The system is first derived from first principles and validated in SAP2000. In order to assess the feasibility of the system it is implemented in the design of a 7-storey building based off an already built con...

Numerical Study of Pin-Supported Cross-Laminated Timber (CLT) Shear Wall System Equipped with Low-Yield Steel Dampers
https://open.library.ubc.ca/cIRcle/collections/ubc... [Seismic Performance] [Thesis/Dissertation] 2016
Siyao Ma
This thesis presents a numerical study of a novel rocking cross-laminated timber (CLT) shear wall system for low- to mid-rise constructions. The system takes advantage of the high in-plane stiffness of CLT coupled with low-yield steel dampers to control the rocking motion of the CLT shear walls during earthquakes. The low-yield steel dampers connected between two rigid CLT wall panels provide the mechanism needed to dissipate the earthquake energy. This concentrates the damage in the dampers, al...

Investigating the Performance of the Construction Process of an 18-storey Mass Timber Hybrid Building
https://open.library.ubc.ca/cIRcle/collections/ubc... [Tall Buildings] [Thesis/Dissertation] 2017
Mohamed Kasbar
The use of mass timber in high rise construction is an innovation. Mass timber construction has influential benefits including a lower overall construction time, a lower environmental impact, the use of renewable resource and an improved aesthetics. Despite the mentioned benefits, mass timber is not the traditional material for low to mid-rise commercial, institutional and residential construction in Canada. This is partially due to the need to explore the efficiency of mass timber construction ...

Improving the Sound Absorption of Cross-Laminated Timber Panels Using Resonant Absorbent Layer
https://open.library.ubc.ca/cIRcle/collections/ubc... [Vibration/Acoustic Performance] [Thesis/Dissertation] 2017
Banda Logawa
Developed in the mid-1990s in Austria and Germany, Cross Laminated Timber (CLT) is an innovative wood product known for its strength in both orthogonal directions, and its dimensional stability, making it a sustainable alternative to concrete slabs. CLT is created through the cross-lamination process, which glues together odd number of layers of wood planks placed in orthogonally alternating directions. With the growing interest in the application of CLT in North America, numerous studies has be...

Feasibility Study of Using Cross-Laminated Timber Core for the UBC Tall Wood Building
https://open.library.ubc.ca/cIRcle/collections/ubc... [Tall Buildings] [Thesis/Dissertation] 2017
Manu Moudgil
Mass-timber is a suitable material for construction of tall buildings, owing to its aesthetic, environmental and structural benefits over conventional materials. Cross Laminated Timber (CLT) is formed by gluing three or more lumber layers crosswise. Brock Commons at the University of British Columbia is currently the tallest timber hybrid building in the world. The building utilizes a concrete ground floor to resist vertical loads from the mass-timber superstructure and two concrete elevator cor...

Displacement-Based Design of Reinforced Concrete Moment Resisting Frame Incorporating Cross Laminated Timber Infill and Metallic Damper Connector
https://open.library.ubc.ca/cIRcle/collections/ubc... [Connectors] [Thesis/Dissertation] 2018
Jayanthan Madheswaran
Timber based hybrid structures are becoming popular in Canada. These structures are constructed by combining mass timber called Cross Laminated Timber (CLT) and with reinforced concrete or steel structural systems. During the seismic event, these hybrid structures performance can be increased by using proper energy dissipative connections, for example, dampers. By considering the above, this thesis developed a new reinforced concrete hybrid structure by incorporating CLT and metallic dampers....

Conventional and Novel Timber Steel Hybrid Connections: Testing, Performance and Assessment
https://open.library.ubc.ca/cIRcle/collections/ubc... [Connectors] [Thesis/Dissertation] 2015
Johannes Schneider
The combination of timber and steel for residential hybrid buildings is an unconventional approach to date. The challenge of a hybrid structure is the link between the individual materials. The focus of this research is the connection between steel frame and the infill wall. Over 100 conventional bracket-type connections with various combinations of bracket and fasteners with cross-laminated timber were tested, investigated and assessed for damage under seismic loading protocols for a hybrid app...

Failure Mechanism of Rolling Shear Failure in Cross-Laminated Timber
https://open.library.ubc.ca/cIRcle/collections/ubc... [Mechanical Performance] [Thesis/Dissertation] 2015
Xin Nie
Wood as building material is gaining more and more attention in the 21st century due to its positive attributes such as light weight, renewability, low carbon footprint and fast construction period. Cross-laminated timber (CLT), as one of the new engineered wood products, requires more research emphasis since its mechanical performance can allow CLT to be utilized in massive timber structures. This thesis focuses on revealing one of the key failure mechanisms of CLT, which is usually referred to...

Mitigating Torsional Irregularity using Cross Laminated Timber-Reinforced Concrete Hybrid System
https://open.library.ubc.ca/cIRcle/collections/ubc... [Alternative/Hybrid Configurations] [Thesis/Dissertation] 2016
Mahdi Yazdinezhad
Seismic torsional responses in buildings is a result of eccentricity in mass and stiffness distribution. Torsional irregularity is one of the major causes of severe damage and collapse of structures during an earthquake. In this study, effect of torsion on the structures is reviewed, the definition of torsional irregularity and the characteristic of the structure that leads to this type of irregularity is elaborated. The evolution of the methods to consider the effect of torsion in the National ...

Force Based Design Guideline for Timber-Steel Hybrid Structures: Steel Moment Resisting Frames with CLT Infill Walls
https://open.library.ubc.ca/cIRcle/collections/fac... [Fire Performance] [Report] 2015
Solomon Tesfamariam, Siegfried Stiemer, Matiyas Bezabeh, Caleb Goertz, Marjan Popovski, Katsuichiro Goda
Provincial code changes have been made to allow construction of light wood-frame buildings up to 6 storeys in order to satisfy the urban housing demand in western Canadian cities. It started in 2009 when the BC Building Code was amended to increase the height limit for wood-frame structures from four to six. Recently, provinces of Quebec, Ontario and Alberta followed suit. While wood-frame construction is limited to six storeys, some innovative wood-hybrid systems can go to greater heights. In t...