Axial – Shear interaction on CLT hold-down connections – Experimental investigation
https://www.sciencedirect.com/science/article/pii/... [Connectors] [Journal Article] 2018
Luca Pozza, Barbara Ferracuti, Milena Massari, Marco Savoia
Nowadays, the design of CLT wall connections is based on the hypothesis that hold-down connections are subjected only to tension and angle-brackets only to shear. Nevertheless, experimental investigations on CLT walls under seismic action highlighted that hold-downs may be subjected also to significant lateral displacement, and then to a tension-shear coupled action. The aim of this work is to experimentally investigate the axial-shear interaction in typical hold-down connections. To this purpos...

Structural performance of multi-story mass-timber buildings under tornado-like wind field
https://www.sciencedirect.com/science/article/pii/... [Other] [Journal Article] 2018
Matiyas A. Bezabeh, Anant Gairola, Girma T. Bitsuamlak, Marjan Popovski, Solomon Tesfamariam
Tall mass-timber buildings utilize engineered wood panels to form their main gravity and lateral load resisting systems, which makes them lighter and more flexible than buildings made from concrete, masonry or even steel. In general, drift sensitive components of tall mass-timber buildings could be susceptible to damages due to increased deflection when subjected to extreme wind storms like violent tornadoes. This paper assessed the structural performance of a multi-story mass-timber building, w...

Bending and compressive properties of cross-laminated timber (CLT) panels made from Canadian hemlock
https://www.sciencedirect.com/science/article/abs/... [Raw Materials] [Journal Article] 2018
Minjuan He, Xiaofeng Sun, Zheng Li
Cross-laminated timber (CLT) is an innovative engineering wood panel product made from gluing layers of solid-sawn lumber at perpendicular angles. Owing to the excellent structural rigidity in both orthogonal directions, CLT becomes a preferred construction material for shear walls, floor diaphragms, and roof assemblies. CLT is normally made of Spruce-pine-fir (SPF) lumber or Douglas fir-Larch lumber. Recently, attempts have been made to manufacture CLT with Canadian hemlock. This paper investig...

Feasibility of manufacturing cross-laminated timber using fast-grown small diameter eucalyptus lumbers
https://www.sciencedirect.com/science/article/abs/... [Raw Materials] [Journal Article] 2017
Yuchao Liao, Dengyun Tu, Jianhui Zhou, Haibin Zhou, Hong Yun, Jin Gu, Chuanshuang Hu
Eucalyptus is one of the most important plantation species in South China. Alternate applications of plantation grown hardwood such as eucalyptus need to be developed due to decreased demands of fibers for pulp and paper industry. The feasibility of manufacturing three-layer cross-laminated timber (CLT) using fast-grown small diameter eucalyptus wood (Eucalyptus urophylla × Eucalyptus grandis) was evaluated in this study. L9 (33) orthogonal tests with three factors and three levels were adopted ...

Evaluation of the mechanical properties of cross laminated timber with elementary beam theories
https://www.sciencedirect.com/science/article/abs/... [Mechanical Performance] [Journal Article] 2016
I.P. Christovasilis, M. Brunetti, M. Follesa, M. Nocetti, D. Vassallo
This paper presents a study on the assessment of the mechanical properties of cross laminated timber (CLT) panels based on four-point bending tests. The most recent or well-established analytical theories have been implemented to estimate stiffness and strength properties under loads perpendicular or parallel to the principal plane of CLT panels from laboratory tests. The main objectives were to evaluate each proposed theory in predicting the associated deformation and failure mechanisms and to ...

Seismic behaviour of Cross-Laminated Timber structures: A state-of-the-art review
https://www.sciencedirect.com/science/article/pii/... [Seismic Performance] [Journal Article] 2018
MatteoIzzi, Daniele Casagrande, Stefano Bezzi, Dag Pasca, Maurizio Follesa, Roberto Tomasic
Cross-Laminated Timber (CLT) structures exhibit satisfactory performance under seismic conditions. This is possible because of the high strength-to-weight ratio and in-plane stiffness of the CLT panels, and the capacity of connections to resist the loads with ductile deformations and limited impairment of strength. This study summarises a part of the activities conducted by the Working Group 2 of COST Action FP1402, by presenting an in-depth review of the research works that have analysed the se...

Experimental and numerical evaluation of hold-down connections on radiata pine Cross-Laminated-Timber shear walls: a case study in Chile
https://link.springer.com/article/10.1007/s00107-0... [Raw Materials] [Journal Article] 2018
F. Benedetti, V. Rosales, A. Opazo-Vega, J. Norambuena-Contreras, A. Jara-Cisterna
Cross-Laminated-Timber (CLT) structures have gained popularity in the field of medium-rise buildings due to the quick fabrication and assembly of the panels. However, connections in radiata pine CLT shear walls and the behavior of CLT structures under lateral loads is still not well understood. In this context, this paper studies the structural behavior of hold-down connections on radiata pine CLT walls by means of experimental tests and numerical simulations under static and dynamic conditions....

Numerical study on the elastic buckling of cross-laminated timber walls subject to compression
https://www.sciencedirect.com/science/article/abs/... [Mechanical Performance] [Journal Article] 2019
Juan Carlos Pina, Erick I. Saavedra Flores, Karin Saavedra
The recent trend towards the use of Cross-Laminated Timber (CLT) as a novel construction material in mid- and high-rise buildings has steered the research efforts into this subject over the last few years. Despite the considerable progress made on the structural response of CLT, there are still several unresolved issues related to the analysis and design of CLT. This is of great interest for engineers and designers working on the mass timber construction sector. In particular, the buckling behav...

Measurement of Rolling Shear Modulus and Strength of Cross-Laminated Timber Using Bending and Two-Plate Shear Tests
https://wfs.swst.org/index.php/wfs/article/view/16... [Mechanical Performance] [Journal Article] 2014
Q. Y. Zhou, M. Gong, Y. H. Chui, M. Mohammad
Rolling shear properties of cross-laminated timber (CLT) are very low because of the configuration of the cross layer. In some applications, they are the key properties that govern the design and application of CLT. To explore an appropriate method for assessing the rolling shear properties of CLT, variable span bending tests and two-plate shear tests were conducted. Three types of down-scaled black spruce (Picea mariana) specimens, including wooden cross layer (WCL), steel-wood-steel (SWS), and...

Static Bending Strength Performances of Cross-Laminated Wood Panels Made with Six Species
https://wfs.swst.org/index.php/wfs/article/view/22... [Mechanical Performance] [Journal Article] 2016
Han-Min Park, Masami Fushitani, Hee-Seop Byeon, Jae-Kyung Yang
In this study, with the view to using effectively Korean small and medium diameter woods as structural materials, the cross-laminated wood panels were manufactured by using six species of Korean softwoods and hardwoods, and static bending strength performances were investigated for each species. The static bending strength performances of parallel- and cross-laminated wood panels increased in proportion to the density of species on the whole. The static bending strength performances perpendicula...

Cross-Laminated Timber | Products and Systems
https://www.thinkwood.com/mass-timber-webform/cros... [Markets] [Web Page] 2019
Think Wood
Cross-laminated timber (CLT) is a wood panel system that is gaining in popularity in the U.S. after being widely adopted in Europe. CLT is the basis of the tall wood movement, as the material’s high strength, dimensional stability and rigidity allow it to be used in mid- and high-rise construction....

Building solutions - Technical Brochure CLT | Stora Enso
http://www.clt.info/en/media-downloads/brochures/... [Commercial/Company Information] [Web Page] 2019
Stora Enso
The most important technical information - such as building physics, statics or technical details about CLT – are explained short and clear in this brochure...

Experimental and Numerical Assessment of the Seismic Behaviour of Log and Cross Laminated Timber Systems
https://www.researchgate.net/publication/323812277... [Seismic Performance] [Thesis/Dissertation] 2016
Chrysl Assumpta Aranha
This thesis focuses on the study of the seismic behaviour of two engineered timber construction systems, the first of which, is the log house system - one of the earliest forms of timber construction that is in use even till date, albeit with significant improvements. The second construction system is one of the most recent entrants into the building industry, the cross-laminated timber (CLT) system. The thesis aims at assessing the seismic resistance of the aforementioned systems based on a com...

Analytical Approach to Establishing the Elastic Behavior of Multipanel CLT Shear Walls Subjected to Lateral Loads
https://www.researchgate.net/publication/322194596... [Seismic Performance] [Journal Article] 2018
Daniele Casagrande, Ghasan Doudak, Luigi Mauro, Andrea Polastri
Structures assembled with cross-laminated timber (CLT) panels, and designed to resist gravity and lateral loads, are being considered as viable options for low-rise to mid-rise buildings. In this paper, an analytical approach based on the minimum total potential energy principle has been developed in order to determine the mechanical behavior of 1-story multipanel CLT walls. Expressions for determination of the elastic stiffness and capacity are proposed that take into account the geometry of th...

Feasibility Study of Mass-Timber Cores for the UBC Tall Wood Building
https://www.researchgate.net/publication/326758494... [Tall Buildings] [Journal Article] 2018
Thomas Connolly, Cristiano Loss, Asif Iqbal, Thomas Tannert
The UBC Brock Commons building in Vancouver, which comprises of 18 stories and stands 53 m in height, was at the time of completion in 2016 the world’s tallest hybrid wood-based building. The building’s 17 stories of mass-timber superstructure, carrying all gravity loads, rest on a concrete podium with two concrete cores that act as both the wind and seismic lateral load-resisting systems. Whereas the construction of the concrete cores took fourteen weeks in time, the mass-timber superstructure ...

Mass Timber Archives | Think Wood
https://www.thinkwood.com/news/tag/mass-timber/pag... [Markets] [Web Page] 2019
Think Wood
Research Library News & Events About Opportunities for Wood Marketplace Design Trends Project Efficiencies Economic Growth Building Better Health & Well Being High Performance Taller Buildings Sustainability Products and Systems Light-Frame Construction Nail-Laminated Timber (NLT) NLT Design + Construction Guide Download Cross-Laminated Timber (CLT) CLT Handbook Download Dowel-Laminated Timber (DLT) Glue-Laminated Timber (Glulam) Design Tools Performance Fire Safety and Protection Durability Se...

Experimentally based q-factor estimation of cross-laminated timber walls
https://www.researchgate.net/publication/305147888... [Seismic Performance] [Journal Article] 2016
Luca Pozza, Roberto Scotta, Davide Trutalli, Andrea Polastri, Ian Smith
Behaviour factor values applicable to cross-laminated timber (CLT) buildings are determined and several variables influencing construction are examined. The necessary experimental tests and analytical interpretation for estimating the behaviour factors for CLT wall systems, characterised as they are by several types of layout, were performed. The information given in this paper may be used to estimate the behaviour factor of whole CLT buildings. The results show that the proposed q-factors confi...

Numerical modelling of steel-to-timber joints and connectors for CLT structures
https://www.researchgate.net/publication/308295482... [Connectors] [Conference Paper] 2016
Matteo Izzi, Giovanni Rinaldin, Massimo Fragiacomo, Andrea Polastri
The mechanical behaviour of steel-to-timber joints with annular-ringed shank nails is investigated using numerical modelling and a component approach. These joints are used in Cross-Laminated Timber (CLT) buildings to anchor metal connectors such as hold-downs and angle brackets to the timber panels. At first, a general hysteresis model is introduced, where a single fastener joint is schematized as an elasto-plastic beam embedded in a non-linear medium with a compression-only behaviour. A second...

Structural Design, Approval, and Monitoring of a UBC Tall
https://www.researchgate.net/publication/315868555... [Moisture/Durability] [Conference Paper] 2017
Thomas Tannert, M. Moudgil
In this paper, we discuss the structural design of one of the tallest timber-based hybrid buildings in the world: the 18 storey, 53 meter tall student residence on the campus of the University of British Columbia in Vancouver. The building is of hybrid construction: 17 storeys of mass wood construction on top of one storey of concrete construction. Two concrete cores containing vertical circulation provide the required lateral resistance. The timber system is comprised of cross-laminated timber ...

Crosslamtimber Building Systems Products
https://crosslamtimber.com.au/Products... [Commercial/Company Information] [Web Page] 2019
Sustainable Building Resources
Sustainable Building Resources Pty Ltd works in collaboration with some of the biggest European suppliers of cross-laminated timber, as well as the world leading independent mass timber engineers to offer you the best options at any given time. The cross-laminated panels all have DE/EN/EU technical approval. With a large range of products available, our specialist engineers and designers will help you find the most appropriate solutions for your project....