StructureCraft Facility - Think Wood
https://www.thinkwood.com/projects/structurecraft-... [Case Study/Projects] [Web Page] 2022
Think Wood
StructureCraft, structural engineers and builders of innovative timber structures, sets a new standard in industrial wood building design with their facility based in Abbotsford, British Columbia, Canada. Its prefabricated wall and roof panels showcase the variety of cutting-edge mass timber and engineered wood products that the facility itself produces for projects around the world. Prefabrication technologies cut construction time considerably and the building was assembled in about one week....

Lateral resistance of mass timber shear wall connected by withdrawal-type connectors
https://rd.springer.com/content/pdf/10.1186%2Fs100... [Connectors] [Journal Article] 2021
Sung-Jun Pang, Kyung-Sun Ahn, Seog Goo Kang, Jung-Kwon Oh
In this study, the lateral resistances of mass timber shear walls were investigated for seismic design. The lateral resistances were predicted by kinematic models with mechanical properties of connectors, and compared with experimental data. Four out of 7 shear wall specimens consisted of a single Ply-lam panel and withdrawal-type connectors. Three out of 7 shear wall specimens consisted of two panels made by dividing a single panel in half. The divided panels were connected by 2 or 4 connectors...

Effects of knot area ratio on the bending properties of cross-laminated timber made from Korean pine
https://rd.springer.com/content/pdf/10.1007%2Fs002... [Raw Materials] [Journal Article] 2021
Sung-Jun Pang, Kug-Bo Shim, Keon-Ho Kim
The effect of knot clusters on the bending properties of Korean pine (Pinus koraien-sis) cross-laminated timber (CLT) was analyzed to increase the utilization of low-quality lumber. The laminae used to manufacture the CLT were classified into five groups, four major layer groups, and one minor layer group, by mechanical grade and knot area ratio (KAR) of the lamina. Out-of-plane bending tests were conducted on CLT made from each layer group. The modulus of elasticity (MOE) of the manufactured CL...

Prediction of withdrawal resistance for a screw in hybrid cross-laminated timber
https://rd.springer.com/content/pdf/10.1186%2Fs100... [Connectors] [Journal Article] 2020
Sung-Jun Pang, Kyung-Sun Ahn, Seog Goo Kang, Jung-Kwon Oh
The aim of this study was to predict the withdrawal resistance of a screw in hybrid cross-laminated timber (CLT) composed of two types of lamina layers. A theoretical model to predict the withdrawal resistance was developed from the shear mechanism between a screw and the layers in hybrid CLT. The parameters for the developed model were the withdrawal stiffness and strength that occurs when a screw is withdrawn, and the penetration depth of a screw in layers of a wood material. The prediction mo...

Moment and shear capacity of Ply-lam composed with plywood and structural timber under out-of-plane bending
https://rd.springer.com/content/pdf/10.1186%2Fs100... [Mechanical Performance] [Journal Article] 2019
Sung-Jun Pang, Hyeon-Jeong Lee, Seung Min Yang, Seog Goo Kang, Jung-Kwon Oh
The aim of this study was to investigate the moment and shear capacity of Ply-lam which is composed with plywood and structural timber. The moment and shear capacity of Ply-lam were predicted by using prediction methodologies for typical cross-laminated timber (CLT). The predicted values by the methodologies were verified by comparison with measured capacities. Fifty-eight specimens of Ply-lam (five layers) were manufactured and half of the specimens were tested for bending (span-to-depth ratio ...

Long-term performance of post-tensioned cross-laminated timber (CLT) shear walls: hygro-mechanical model validation and parametric analysis
https://link.springer.com/content/pdf/10.1007/s434... [Moisture/Durability] [Journal Article] 2022
Xiuzhi Zheng, Minjuan He, Zheng Li, Qi Luo
Post-tensioned cross-laminated timber (CLT) shear wall structure is an innovative solution of earthquake resilient structures. The prestressing force of post-tensioned CLT shear walls remarkably affect the structural seismic performance. Due to the time-dependent elastic, creep, and environmental deformation of wood, the prestressing force will change over the service life of the structure. In this study, a hygro-mechanical numerical model for simulating the time-dependent performance of post-te...

EFFICIENCY OF INTENSITY MEASURES FOR SEISMIC RESPONSE PREDICTION IN CLT BUILDINGS VIA DATA SCIENCE METHODS
https://www.researchgate.net/publication/354930941... [Seismic Performance] [Conference Paper] 2021
Aedo-Maluje, Sebastian & Málaga-Chuquitaype, Christian & Macedo, Jorge & Soleimani, Farahnaz
This paper investigates the influence of different ground-motion intensity measures on the seismic response of cross-laminated timber (CLT) buildings using advanced data science methods. To this end, 9 CLT buildings with different structural arrangements, such as the number of storeys and behaviour factors, are modelled and subjected to 1654 acceleration records through nonlinear response-history analysis. From these analyses, inter-storey drifts, floor accelerations, and storey shears are deter...

Long-term performance of post-tensioned cross-laminated timber (CLT) shear walls: hygro-mechanical model validation and parametric analysis
https://link.springer.com/article/10.1007/s43452-0... [Moisture/Durability] [Journal Article] 2022
Xiuzhi Zheng, Minjuan He, Zheng Li & Qi Luo
Post-tensioned cross-laminated timber (CLT) shear wall structure is an innovative solution of earthquake resilient structures. The prestressing force of post-tensioned CLT shear walls remarkably affect the structural seismic performance. Due to the time-dependent elastic, creep, and environmental deformation of wood, the prestressing force will change over the service life of the structure. In this study, a hygro-mechanical numerical model for simulating the time-dependent performance of post-te...

Innovative timber building systems: comparative testing and modelling of earthquake behaviour
http://link.springer.com/10.1007/s10518-017-0264-x... [Seismic Performance] [Journal Article] 2017
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 ...

Monotonic and Cyclic Behavior of CLT Diaphragms
https://ascelibrary.org/doi/full/10.1061/%28ASCE%2... [Seismic Performance] [Journal Article] 2022
Cody Beairsto; Rakesh Gupta, Ph.D.; and Thomas H. Miller, Ph.D., P.E., M.ASCE
Mass timber is emerging in new markets for wood buildings, requiring more design knowledge to compete with other structural materials. Large, in-plane tests on cross-laminated timber (CLT) diaphragms (4,570 ×4,570  mm) were used to quantify ductility through the diaphragm force reduction factor (Rs) and m-factors from ASCE standards, and validate common design methods. Tests demonstrated that CLT can function well as a diaphragm with a mean Rs value of 1.19, comparable with precast concrete havi...

Built-in moisture in cross-laminated timber roofs – a field study
https://iopscience.iop.org/article/10.1088/1742-65... [Moisture/Durability] [Journal Article] 2021
J E Gaarder and T D Pettersen
ross-Laminated Timber (CLT) elements have had a growing popularity in recent years due to i.e. low carbon footprint, low weight and efficient construction time. However, the elements are sensitive to moisture and prone to organic growth if not treated properly or if used incorrectly. Roof slabs are particularly exposed, as they have a large area of exposure and the horizontal orientation doesn't allow rainwater run-off. The efforts made to protect CLT-roofing elements by Norwegian contractors va...

Perforated steel structural fuses in mass timber lateral load resisting systems
https://www.sciencedirect.com/science/article/pii/... [Seismic Performance] [Journal Article] 2022
Hossein Daneshvar, Jan Niederwestberg, Carla Dickof, Robert Jackson, Ying Hei Chui
Attention towards high-rise timber buildings has been increasing in recent years as part of the global trend of designing sustainable structural systems. Cross-laminated timber (CLT) shear walls and mass timber braced frames (TBF) are two feasible and sustainable options that can be employed as lateral load resisting systems (LLRS) to stabilise buildings against wind and earthquake loads while reducing the environmental footprints of conventional structures. Tall timber buildings using such syst...

Performance-based design of tall-coupled cross-laminated timber wall building
https://onlinelibrary.wiley.com/doi/full/10.1002/e... [Tall Buildings] [Journal Article] 2022
Biniam Tekle Teweldebrhan,Solomon Tesfamariam
...

Using wood as a new generation building material in the context of sustainable development
https://scindeks-clanci.ceon.rs/data/pdf/0351-9465... [Markets] [Journal Article] 2022
Muhammed Ernur Akiner, İlknur Akiner, Nurdan Akiner, Valentina Zileska Pancovska
Wood is a natural resource that is renewable, easily recoverable and stores carbon dioxide, making wood constructions a feasible alternative to attaining significant sustainability targets. In the '90s, technological attendees invented the laminated wood beams, and it begins to apply the ingenious truss solved principle to the building structures of laminated and plywood. A new generation hybrid construction method dubbed the Urban Timber (UT) System was designed to support the timber buildings ...

Using wood as a new generation building material in the context of sustainable development
https://scindeks.ceon.rs/Article.aspx?artid=0351-9... [Environmental Performance] [Journal Article] 2022
Ernur Akiner Muhammed, Akiner İlknur, Akiner Nurdan, Zileska-Pancovska Valentina
Wood is a natural resource that is renewable, easily recoverable and stores carbon dioxide, making wood constructions a feasible alternative to attaining significant sustainability targets. In the '90s, technological attendees invented the laminated wood beams, and it begins to apply the ingenious truss solved principle to the building structures of laminated and plywood. A new generation hybrid construction method dubbed the Urban Timber (UT) System was designed to support the timber buildings ...

Modern Wood Architecture Examples - Think Wood
https://www.thinkwood.com/projects... [Case Study/Projects] [Web Page]
Think Wood
Select project types that apply and we’ll cross reference our library to show you what we have....

An aqueous polyisocyanate adhesive with excellent bond durability for engineered wood composites enhanced by polyamidoamine-epichlorohydrin co-crosslinking and montmorillonite hybridization
https://www.sciencedirect.com/science/article/pii/... [Bonding/Adhesives] [Journal Article] 2022
Bo Fan, Haofeng Kan, Yufei Kan, Yumei Bai, Guangping Han, Long Bai, Shifeng Zhang, Zhenhua Gao
Recent trends toward mass-timber buildings and tall timber structures necessitate more stringent requirements for the bond durability of adhesives for engineered wood composites. In this work, a cost-effective strategy for manufacturing a novel aqueous polyisocyanate adhesive with excellent hygrothermal resistance for engineered wood composites was produced via co-crosslinking with polyamidoamine-epichlorohydrin (PAE) resin followed by organic–inorganic hybridization with montmorillonite clay (M...

Time-to-Functionality Fragilities for Performance Assessment of Buildings
https://ascelibrary.org/doi/full/10.1061/%28ASCE%2... [Mechanical Performance] [Journal Article] 2021
Jace Furley, S.M.ASCE; John W. van de Lindt, F.ASCE; Shiling Pei, M.ASCE; Sarah Wichman, S.M.ASCE; Hamed Hasani, A.M.ASCE; Jeffrey W. Berman, A.M.ASCE; Keri Ryan, A.M.ASCE; J. Daniel Dolan, F.ASCE; Reid B. Zimmerman, M.ASCE; and Eric McDonnell, M.ASCE
This paper presents a new stochastic methodology for evaluating and quantifying the downtime of a structure in terms of a family of fragilities that represent the probability of exceeding prescribed times to return to functionality. This methodology integrates several existing concepts, namely, Federal Emergency Management Agency P-58 and Resilience-based Earthquake Design Initiative (REDi), to build a family of system (building) level fragility curves corresponding to the time needed to achieve...

EFFECT OF EXPOSURE TO ELEVATED TEMPERATURE ON DOWEL BEARING STRENGTH OF MASS PLYWOOD PANELS
https://wfs.swst.org/index.php/wfs/article/view/31... [Fire Performance] [Journal Article] 2021
Alexander Dillard, Tu X Ho, Aaryan Indra, Arijit Sinha
Design of connections in mass timber are critical. Mass plywood panels (MPP) are a relatively new mass timber product, therefore, only a few studies characterizing their mechanical and connection properties exist. Dowel bearing strength is a critical parameter required in connection design regardless of the complexity of the connection. This study investigated the dowel bearing strength of MPP under the effect of exposure to elevated temperature. Thirty-two exposure duration-temperature combinat...

ASSESSMENT OF SELECTED TYPES OF THE STRUCTURAL ENGINEERED WOOD PRODUCTION FROM THE ENVIRONMENTAL POINT OF VIEW
https://df.tuzvo.sk/sites/default/files/10-02-21_0... [Environmental Performance] [Journal Article] 2021
Acta Facultatis, Xylologiae Zvolen
According to recent findings, the construction industry contributes to almost 40% of global CO2 emissions. Life Cycle Assessment is one of the methods assessing the anthropogenic impact on the environment. This paper compares the production of selected types of structural wood-glued laminated timber (glulam), plywood and three-layer solid wood panel (SWP) in terms of their environmental impact. The results of this analysis are important especially for designers and architects, who can reduce the...