Innovative timber building systems: comparative testing and modelling of earthqu
https://link.springer.com/article/10.1007%2Fs10518... [Connectors] [Journal Article] 2018
C. Sandhaas, P. Schädle, Ario Ceccotti
Several innovative timber building systems were developed in the past few years, among which dowel-laminated timber, CLT with interspaces and prefabricated timber wall elements, whose design requires also verification of the lateral load-carrying system. Therefore, shear wall tests on these three building systems were carried out. Timber frame shear walls were also tested to compare load–displacement behaviour, failure modes and energy dissipation capacity. The four investigated systems exhibit ...

Katerra acquires Michael Green Architecture as it expands into the timber market
https://archpaper.com/2018/05/katerra-picks-up-mic... [Markets] [Magazine/Newspaper Article] 2018
Jonathan Hilburg
Unicorn design/build company Katerra is continuing its impressive expansion from start-up to $3 billion tech-and-construction giant with the recent acquisition of Vancouver’s Michael Green Architecture (MGA). The Canadian architecture studio is known for pushing the boundaries of timber construction (including some of the largest mass timber buildings in the U.S.), and Katerra reportedly wants to use their expertise to bring down construction costs as well as better understand the material....

Numerical Optimisation of Novel Connection for Mass-Timber Buildings
https://www.researchgate.net/publication/326981381... [Connectors] [Conference Paper] 2018
Hercend Mpidi Bita, Thomas Tannert
Learn more Conference: World Conference on Timber Engineering, At Seoul, South Korea Cite this publication Hercend Mpidi Bita 10.97 University of British Columbia - Vancouver Thomas Tannert 31.32 University of Northern British Columbia - Prince George Abstract This paper presents Finite Element Analyses (FEA) with the goal to optimise a novel hold-down connection, suitable for mid-rise mass-timber buildings, for a target yield force. The approach based on capacity-based design first estimates t...

Equivalent stiffness of timber used in CLT: closed-form estimates and numerical validation
https://link.springer.com/article/10.1007/s00107-0... [Mechanical Performance] [Journal Article] 2019
Olivier Perret, Arthur Arthur Lebée, Cyril Douthe, Karam Karam Sab
In this paper, a closed-form approach is presented to estimate rapidly the equivalent stiffness of boards used in cross laminated timber (CLT) panels from local orthotropic behavior at ring scale for varying sawing patterns. It is first assumed that narrow edges are glued. In this case, closed-form Reuss and Voigt bounds are derived for the equivalent layer behavior of CLT. An application to Norway spruce boards is presented and reveals that the cross-layer (rolling) shear behavior lies between ...

It’s Time We Treat Some Forests Like Crops
https://www.outsideonline.com/2402318/gen-z-climat... [Environmental Performance] [Magazine/Newspaper Article] 2019
Marc Peruzzi
Believers in Mass Timber say smaller trees are the ultimate renewable construction material, but only if we learn to be smarter farmers and builders...

Cyclic behaviour of glulam shear walls with bolted connections
https://rd.springer.com/content/pdf/10.1007%2Fs001... [Connectors] [Journal Article] 2016
Daniela Wrzesniak, Massimo Fragiacomo
Dowels and bolts are well established types of fasteners for timber connections. They are fast and easy to assemble which made them become a common solution for joining heavy timber elements. This study investigates the feasibility of bolted connections as a possible anchoring solution for heavy shear walls under seismic loads. Fully reversed cyclic tests were performed on glued laminated (glulam) timber shear walls with un-reinforced and reinforced bolted connections. This study builds up on a ...

Catalyst rising: Cross-laminated timber structure takes shape in U-District
http://www.spokesman.com/stories/2019/sep/06/catal... [Markets] [Magazine/Newspaper Article] 2019
Nicholas Deshais
Work on the Catalyst campus at the south landing of the University District GatewayBridge has moved quickly, and the two buildings under construction are on pace to becomplete early next year. The Catalyst campus is beingdeveloped jointly by Avista and McKinstry, a Seattle-based company that specializes inenergy-efficient buildings. Also unlike steel, there’s not a lot of “give” in CLT,the so-called panels have to fit perfectly, like a LEGO set, Roberts said. Boeckman said the project will be “...

Seismic shear and acceleration demands in multi-storey cross-laminated timber buildings
https://id.elsevier.com/as/authorization.oauth2?pl... [Seismic Performance] [Journal Article] 2019
Cagatay Demirci, Christian Málaga-Chuquitaype, Lorenzo Macorini
A realistic estimation of seismic shear demands is essential for the design and assessment of multi-storey buildings and for ensuring the activation of ductile failure modes during strong ground-motion. Likewise, the evaluation of seismic floor accelerations is fundamental to the appraisal of damage to non-structural elements and building contents. Given the relative novelty of tall timber buildings and their increasing popularity, a rigorous evaluation of their shear and acceleration demands is...

Retrofit techniques for Cross-Laminated Timber (CLT) elements subjected to blast loads
https://id.elsevier.com/as/authorization.oauth2?pl... [Other] [Journal Article] 2019
A. Lopez-Molina, G. Doudak
This paper presents an experimental program that examined the behaviour of seventeen full-scale reinforced cross-laminated timber (CLT) slabs subjected to simulated blast loading using a shock tube. The CLT slabs were retrofitted with steel straps and glass fibre-reinforced polymers (GFRP). The results from the experimental program show that reinforcing the panels with steel straps had minimal effect on the ultimate strength, but significantly affected the post-peak resistance and ductility. Th...

An innovative shear-tension angle bracket for Cross-Laminated Timber structures: Experimental tests and numerical modelling
https://id.elsevier.com/as/authorization.oauth2?pl... [Connectors] [Journal Article] 2019
Giuseppe D'Arenzo, Giovanni Rinaldin, Marinella Fossetti, Massimo Fragiacomo
An experimental testing programme on an innovative metal angle bracket for Cross-Laminated Timber structures is presented in this paper. The main novelty of the angle bracket is the use of fully-threaded screws to improve mechanical properties in tension direction. Monotonic tests to evaluate mechanical properties of the wall-to-floor connection in tension and shear directions are presented and discussed. A detailed three-dimensional finite element model, implemented in ABAQUS, which considers t...

Selection of the most effective pavement surfacing strategy for the Glenwood cross laminated timber parking garage
https://id.elsevier.com/as/authorization.oauth2?pl... [Markets] [Journal Article] 2019
Matthew Haynes, Erdem Coleri, Mostafa Estaji
The use of cross-laminated timber (CLT) is becoming increasingly common in large scale construction projects as a sustainable alternative. This study assesses the effectiveness of several overlay surfaces which are to be installed on top of floor slabs in a proposed CLT parking garage structure. Overlay surfaces are necessary to protect the CLT from moisture and vehicle loadings within the parking garage. First, finite element modeling was performed to determine stress, strain, and deformation d...

Experimental verification of shear analogy approach to predict bending stiffness for softwood and hardwood cross-laminated timber panels
https://id.elsevier.com/as/authorization.oauth2?pl... [Raw Materials] [Journal Article] 2019
Paul Crovella, William Smith, Jacek Bartczak
Lower grade material of three previously untested species (Eastern White Pine, Red Maple, and White Ash) were fabricated in Cross Laminated Timber (CLT) panels and tested to determine their mechanical properties. The results were compared to the ANSI/APA PRG-320 production standard for CLT. Both of the hardwood species met requirements for the V2 species group, but the softwood species did not. Next, the bending stiffness results were compared to bending stiffness predictions from the Shear Anal...

Energy and hygrothermal performance of cross laminated timber single-family homes subjected to constant and variable electric rates
https://id.elsevier.com/as/authorization.oauth2?pl... [Moisture/Durability] [Journal Article] 2019
Lewis Setter, Eric Smoorenburg, Sajith Wijesuriya, Paulo Cesar Tabares-Velasco
Cross Laminated Timber (CLT) is a panelized mass timber product suitable for sustainable building construction that can reduce building energy use and cooling electricity peak demand. Previous studies have shown that CLT has a market in the US for tall commercial buildings. However, most of the current CLT literature has not consider application in residential construction. Residential building energy use is highly susceptible to weather. Thus, it has the potential to benefit from using CLT as t...

Building with Wood = Proactive climate protection
https://awc.org/docs/default-source/default-docume... [Environmental Performance] [Report] 2015
Dovetail Partners, Inc
Forests play a critical role in filtering and renewing our air. Trees absorb carbon dioxide (CO2) and water (H2O), and release oxygen (O2). The carbon absorbed is stored until the trees die and decay orare burned in a wildfire, at which point the carbon is released back into the atmosphere. Some of the carbon absorbed by trees is stored for a long period of time within the forest....

When designing cross-laminated timber (CLT) panels for gravity load applications such as floor or roof panels, should I use the CLT layups defined in the ANSI/PRG 320 standard as the basis of design?
https://www.woodworks.org/experttip/designing-cros... [Markets] [Web Page] 2019
Woodworks
Cross-laminated timber is an engineered wood component manufactured from dimension lumber or structural composite lumber to create large, flat panels of solid wood. It is a member of a new class of massive (or “mass”) timber products—i.e., large-dimension engineered structural wood components that complement the dimension sawn lumber, solid sawn timbers, and structural composite lumber products frequently used in building framing. Other forms of mass timber construction include nail-laminated ti...

German ‘built on demand’ wooden skyscraper stacks prefab living cubes up to 200 metres high
https://www.architectureanddesign.com.au/news/germ... [Tall Buildings] [Magazine/Newspaper Article] 2019
Nathan Johnson
Germany’s Weingartner Architects have released a concept design for a wooden residential skyscraper system dubbed elastic_WOODSCRAPER II that offers an alternative to traditional construction methods and ways of living....

Transition strategies: Accelerating social acceptance and removing the barriers to prefabricated multi-storey timber urban infill developments in Australia using CLT construction systems
https://www.fwpa.com.au/resources/reports/market-a... [Markets] [Report] 2012
Steffen Lehmann, Amanda Reinschmidt, Lauren Mustillo
This report reviewed and formulated strategies for increasing the uptake of and social acceptance of living in multi-storey cross-laminated timber(CLT)-constructed buildings in infill developments. Factors affecting the construction of engineered wood product buildings include: lack of data on the cost of design, construction, operations and maintenance of prefabricated engineered wood buildings; building code standards addressing acoustics, durability and fire, quality control, planning rules a...

CLT Stands Up - A Look at Cross-laminated Timber Wall Design (DES442)
https://awc.org/pdf/education/des/AWC-DES442-CLTWa... [Design/Architectural aspects] [Presentation] 2019
Lori Koch, Michelle Kam-Biron
Even before cross-laminated timber (CLT) was recognized in the 2015 IBC, there was growing interest to use it in the US by designers seeking a sustainable construction product, with a reduced on-site construction time, all while exploiting the natural beauty of wood to provide a pleasing environment to occupants. Not only does CLT meet all of these attributes, but it also provides excellent thermal separation and can be designed to provide up to two hours of fire resistance and even more when pr...

Bending and Shear Stiffness of Cross-Laminated Timber Using a Variable Span Bending Test
https://www.researchgate.net/publication/327251416... [Mechanical Performance] [Journal Article] 2019
Daniel P. Hindman, John C. Bouldin
Accept Cookies top See all › 1 Citations Download citation Share Facebook Twitter LinkedIn Reddit Request full-text Bending and Shear Stiffness of Cross-Laminated Timber Using a Variable Span Bending Test Article in Journal of Testing and Evaluation 47(4):20160147 · July 2019 with 36 Reads DOI: 10.1520/JTE20160147 Cite this publication Daniel Hindman 22.32 Virginia Polytechnic Institute and State University John C. Bouldin Do you want to read the rest of this article?Request full-text Citations...

Biomaterials for Building Skins
https://link.springer.com/content/pdf/10.1007%2F97... [Moisture/Durability] [Book/Book Section] 2019
Anna Sandak, Jakub Sandak, Marcin Brzezicki, Andreja Kutnar
Bio-based materials are considered a promising resource for buildings in the twenty-first century due to their sustainability and versatility. They can be produced locally, with minimum transportation costs and in an ecological manner. This chapter describes the potential of biomaterials for use in façades. It presents several examples of natural resources, including innovative alternative materials that are suitable for implementation as a building skin. Novel products resulting from material m...