Experimental and Numerical Analyses of New Massive Wooden Shear-Wall Systems
https://pdfs.semanticscholar.org/ba10/139e9c5b871f... [Mechanical Performance] [Journal Article] 2014
Luca Pozza, Roberto Scotta, Davide Trutalli, Mario Pinna, Andrea Polastri, Paolo Bertoni
Three innovative massive wooden shear-wall systems (Cross-Laminated-Glued Wall, Cross-Laminated-Stapled Wall, Layered Wall with dovetail inserts) were tested and their structural behaviour under seismic action was assessed with numerical simulations. The wall specimens differ mainly in the method used to assemble the layers of timber boards composing them. Quasi-static cyclic loading tests were carried out and then reproduced with a non-linear numerical model calibrated on the test results to es...

Dowel-Laminated Timber (DLT) | Wood Strength & Application
https://www.thinkwood.com/products-and-systems/mas... [Alternative/Hybrid Configurations] [Web Page] 2020
Think Wood
Dowel-laminated timber (DLT) is common in Europe and is gaining traction in the U.S. for its ease of use with computer-controlled (CNC) machinery—such as lathes, routers and mills—and its all-wood composition. DLT is similar to nail-laminated timber (NLT). Instead of nails or screws, however, DLT uses wood dowels to join laminations....

CLT Knowledge Database - University of Minnesota
https://masstimberdatabase.umn.edu... [General Information] [Web Page] 2020
Espinoza, O.; Thomas, E.; Buehlmann, U.
Welcome to the CLT database. This library contains links to information related to Cross Laminated Timber, including peer-reviewed journal articles, conference papers and presentations, standards, reports, news notes, projects, manufacturers, suppliers, and much more. This database is targeted to anyone interested in learning about or adopting CLT, including architects, engineers, contractors, developers, industry, government, and the public in general. We strive to maintain this database curren...

Tie-force procedure for disproportionate collapse prevention of CLT platform-type construction
https://www.researchgate.net/publication/332107678... [Seismic Performance] [Journal Article] 2019
Hercend Mpidi Bita, Thomas Tannert
Accept Cookies Article Tie-force procedure for disproportionate collapse prevention of CLT platform-type construction March 2019 Engineering Structures 189(2019):195-205 DOI: 10.1016/j.engstruct.2019.03.074 Project: Disproportionate collapse for CLT buildings Authors: Hercend Mpidi Bita 12.1 Katerra Thomas Tannert 31.8 University of Northern British Columbia - Prince George Request the article directly from the authors on ResearchGate. Citations (5) Abstract The existing tie-force requirements ...

An experimental and numerical study on CLT panels used as infill shear walls for RC buildings retrofit
https://www.researchgate.net/publication/332249324... [Seismic Performance] [Journal Article] 2019
Francesca Stazi, Michele Serpilli, Gianluca Maracchini, A. Pavone
Cross Laminated Timber (CLT) has been gaining more and more attention in research and professional fields as a sustainable and promising construction system for mid- and high-rise structures. The need of buildings higher than those usually built with CLT has pushed the research towards the development of innovative hybrid techniques in which steel framed structures incorporate CLT shear walls. This concept may be potentially extended to existing RC framed buildings, where CLT infill shear walls ...

Influence of orientation and number of layers on the elastic response and failure modes on CLT floors: modeling and parameter studies
https://link.springer.com/content/pdf/10.1007/s001... [Mechanical Performance] [Journal Article] 2016
Lorenzo Franzoni, Arthur Lebée, Florent Lyon, Gilles Forêt
In the present paper, the bending behavior of Cross Laminated Timber panels is investigated by means of the linear elastic exact solution from Pagano (1970, 1969). The resulting stresses are the input for a wood failure criterion, which can point out the first-crack load and the respective dominant failure mode. Heterogeneous layers are modeled as equivalent and homogeneous layers. This simplified and deterministic modeling gives results in good agreement with a reference experimental test. A co...

SOFIE project – 3D shaking table test on a seven‐storey full‐scale cross‐laminated timber building
https://doi.org/10.1002%2Feqe.2309... [Seismic Performance] [Journal Article] 2013
Ario Ceccotti, Carmen Sandhaas, Minoru Okabe, Motoi Yasumura, Chikahiro Minowa, Naohito Kawai
Multi‐storey buildings made of cross‐laminated timber panels (X‐lam) are becoming a stronger and economically valid alternative in Europe compared with traditional masonry or concrete buildings. During the design process of these multi‐storey buildings, also their earthquake behaviour has to be addressed, especially in seismic‐prone areas such as Italy. However, limited knowledge on the seismic performance is available for this innovative massive timber product. On the basis of extensive testin...

Cross Laminated Timber – Forestry Connect
https://forestryconnect.com/tag/cross-laminated-ti... [Markets] [Web Page] 2020
Forestry Connect
Empowering the Forest Industry Home Jobs Latest Industry News Events Services Quick IMS Webforestry Intell About Contact Advertise Sign Up To our Newsletter cross laminated timber Home Posts Tagged cross laminated timber (Page 3) High Rises Made of Wood? Lofty wood buildings are popping up in... Sir Bob Jones to build one of world’s tallest laminated timber buildings in Wellington One of the world’s tallest wooden buildings is being built in Wellington next year, says the man behind the project...

Cross-Laminated Timber (CLT)
https://cwc.ca/how-to-build-with-wood/wood-product... [General Information] [Others] 2020
The Canadian Wood Council
Cross-laminated timber (CLT) is a proprietary engineered wood product that is prefabricated using several layers of kiln-dried lumber, laid flat-wise, and glued together on their wide faces. Panels typically consist of three, five, seven or nine alternating layers of dimension lumber. The alternating directions of the CLT laminations provide it with high dimensional stability. CLT also has a high strength to weight ratio, along with exhibiting advantages for structural, fire, thermal and acousti...

Mass Timber Conference Recap: Testing and Research | Think Wood
https://www.thinkwood.com/news/mass-timber-confere... [General Information] [Others] 2018
Think Wood
Testing and research different products and systems is integral to informing modern building codes. Here is some of the leading-edge research currently underway on the topic, building the evidence for wood’s safety and performance capabilities across a range of applications....

Ductility Based Force Reduction Factors for Symmetrical Cross-Laminated Timber Structures
https://www.researchgate.net/publication/274959160... [Seismic Performance] [Journal Article] 2015
Marjan Popovski, Shiling Pei, John W. van de Lindt, Erol Karacabeyli
Cross-laminated timber (CLT) as a structural system has not been fully introduced in European or North American building codes. One of the most important issues for designers of CLT structures in earthquake prone regions when equivalent static design procedure is used, are the values for the force modification factors (R-factors) for this structural system. Consequently, the objective of this study was to derive suitable ductility-based force modification factors (Rd-factors) for seismic design ...

Guide for On-site Moisture Management of Wood Construction
https://www.bchousing.org/publications/Wood-Constr... [Moisture/Durability] [Report] 2016
Jieying Wang
This is a principles-based document that provides guidelines and relevant information about on-site moisture management practices that can be adapted to suit a range of wood construction projects. The document aims to help designers and construction companies/builders assess the potential for moisture-related issues arising during the construction phase of a wood building project and identify the appropriate actions to mitigate such risk. Wetting is the primary concern in most climates but an ex...

Can cross-laminated timber (CLT) be pressure-treated? - WoodWorks
https://www.woodworks.org/experttip/2019-nov/... [Moisture/Durability] [Others] 2020
WoodWorks
This is a question we receive frequently and, while the short answer is no, CLT cannot be pressure-treated as the panel sizes are too large for current manufacturing equipment, other wood options can often be used for the desired application....

Ensaios experimentais de painéis de madeira de Pinus pinaster (Pinho bravo)
https://pdfs.semanticscholar.org/2526/1ee006a00919... [Raw Materials] [Journal Article] 2016
Pedro Gil Girão Dos Santos, Alfredo Manuel Pereira Geraldes Dias, Telmo Filipe Marques Morgado, Carlos Eduardo De Jesus Martins
The present work describes an experimental exploratory study with the aim of production of wooden panels of Pinho bravo (Pinus pinaster) for constructive purposes. The analyzed product was obtained by bonding layers composed of processed wood pieces with rectangular cross section, orthogonally to each other, to produce panels. The product in question is similar to cross laminated timber, but the bond between layers was made in a linear way and not over the entire surface. The modulus of elastici...

Experimental tests on a Hybrid Timber-Frame wall system
https://www.researchgate.net/publication/320057434... [Alternative/Hybrid Configurations] [Journal Article] 2017
Izzi, Matteo; Casagrande, Daniele; Sinito, Ester; Pasetto, Gaia; Polastri, Andrea
This paper presents an innovative lateral load-resisting wall system, which is an evolution of the light-timber frame (LTF) shear walls currently available on the market. In comparison to traditional LTF walls, the novelty aspect is the use of cross-laminated timber (CLT) beams and studs instead of solid timber elements. Thanks to this 'hybrid' approach, this new system combines some peculiar aspects of LTF structures (such as the limited weight and the high dissipative behaviour) with the poten...

Effects of the width and lay-up of sugi cross-laminated timber (CLT) on its dynamic and static elastic moduli, and tensile strength
https://www.semanticscholar.org/paper/Effects-of-t... [Raw Materials] [Journal Article] 2015
Hirofumi Ido, Hirofumi Nagao, Masaki Harada, Hideo Kato, Junko Ogiso, Atushi Miyatake
Cross-laminated timber (CLT) has recently emerged as a new wood product that utilizes a large quantity of domestic lumber. This study aims to analyze the effects of width and lay-ups on the tensile strength of CLT. To this end, the elastic modulus of sugi CLT with different lay-ups was measured by dynamic and static methods. Moreover, tensile tests were conducted for different widths and lay-ups of CLT. Results indicate that the apparent bending Young’s modulus, as calculated using the dynamic m...

Mass Timber Conference Recap: The Economics of Mass Timber | Think Wood
https://www.thinkwood.com/news/mass-timber-confere... [Markets] [Others] 2018
Think Wood
Determining the true cost of a building material requires evaluating the product over its life cycle and taking into account environmental as well as monetary costs. By these measures, wood frequently offers significant overall efficiencies over comparable materials such as concrete and steel. From the Mass Timber Conference here is what some of the industry leaders are saying when it comes to the economics of mass timber. ...

Prototyping a Passively Self-Centering Cross-Laminated Timber Rocking Wall System: Analytical and Experimental Investigation
https://pdfs.semanticscholar.org/cc11/56478e8d9ec9... [Seismic Performance] [Journal Article] 2018
Marco Lo Ricco, Al Ghorbanpoor, Shiling Pei, Doug Rammer, Marshall Begel, James Bridwell, Reid B. Zimmerman
Cross-Laminated Timber (CLT) garners international interest with increasingly taller wood structures built of robust, rigid panels. For seismic resilience of multistory platform construction, this study prototypes a CLT rocking wall system with an elliptical boundary profile. Curvilinear cuts to the load-bearing edges of a rectangular CLT panel produce smoother lateral response to earthquakes, with gravity-driven passive re-centering ability and reduced crushing damage at wall corners. Stiffness...

Bonding quality of industrially produced cross-laminated timber (CLT) as determined in delamination tests
https://www.researchgate.net/publication/311897459... [Bonding/Adhesives] [Journal Article] 2017
Markus Knorz, Stefan Torno, Jan-Willem van de Kuilen
The resistance to delamination of cross-laminated timber (CLT) made from spruce has been investigated. The main goal was to examine if delamination results are influenced by the shape of test specimens as both square and round specimens may be evaluated according to the CLT standard EN 16351. Furthermore, the influence of the production parameters number of layers, layer thickness and bonding pressure on delamination behavior were investigated. The results show that specimen shape and number of ...

The Influence of Panel Lay-Up on the Characteristic Bending and Rolling Shear Strength of CLT
https://www.semanticscholar.org/paper/The-Influenc... [Mechanical Performance] [Journal Article] 2018
Conan O'Ceallaigh, Karol Sikora, Annette M. Harte
The objective of this study was to characterise the behaviour of cross laminated timber (CLT) panels and the influence of the panel lay-up on the failure strength. Three different panel configurations of thickness, 60 mm, 100 mm, and 120 mm, were loaded in the out-of-plane direction. The 60 mm and 120 mm panel configuration comprised three layers of equal thickness, and the intermediate 100 mm thick panel comprised five layers of equal thickness. The mean and characteristic bending and rolling s...