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A review of modular cross laminated timber construction: Implications for temporary housing in seismic areas
https://www.sciencedirect.com/science/article/abs/... [Seismic Performance] [Journal Article] 2022 Sujit Bhandari, Mariapaola Riggio, Sina Jahedi, Erica C. Fischer, Lech Muszynski, Zhixin Luo Modular construction has multiple advantages over conventional alternatives, including accelerated build schedules, greater certainty on build costs, times, and quality, and less waste during construction. Prefabricated engineered wood panels, such as Cross Laminated Timber (CLT) are well-suited for modular structures. This paper evaluates the features of modular CLT construction completed between 2009 and 2021, focusing on architectural and engineering design, manufacturing, and logistics.... |
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Lateral Performance Simulation of Conventional CLT Shear Wall and Structure by Equivalent Decomposed Wall Model
https://ascelibrary.org/doi/full/10.1061/JSENDH.ST... [Connectors] [Journal Article] 2022 Yunxiang Ma, Qingli Dai The study aims to simulate the lateral responses of the conventional cross laminated timber (CLT) shear wall by establishing the equivalent decomposed wall models and providing lateral performance evaluation of walls with varied connections and walls in mass timber structures. First, the connection hysteresis model was built by calibrating the corresponding test results from references. Then, a detailed wall model, assembled with the calibrated connection models and shell elements, was calibrate... |
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Impact of built-in moisture on the design of hygrothermally safe cross-laminated timber external walls: A stochastic approach
https://www.sciencedirect.com/science/article/abs/... [Moisture/Durability] [Journal Article] 2022 Villu Kukk, Jaan Kers, Targo Kalamees, Lin Wang, Hua Ge In terms of hygrothermal performance, solid wood panels composed of cross-laminated timber (CLT) are sensitive to moisture. However, to the best of our knowledge, no clear indications of critical initial moisture conditions for CLT envelopes regarding the dry-out of built-in moisture have been provided. Therefore, our main objective was to set critical limit values for CLT external wall design in terms of their initial moisture content (built-in moisture) and dry-out capacity (vapour resistance ... |
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Arrangement of reinforcement in variable density timber slab systems for multi-story construction
https://journals.sagepub.com/doi/full/10.1177/1478... [Design/Architectural aspects] [Journal Article] 2022 Luis Orozco, Anna Krtschil, Lior Skoury, Jan Knippers, Achim Menges The arrangement of columns and their spacing in multi-story timber construction is restricted to rectangular grids by the production and shipping sizes of floor assemblies. This is particularly true for hollow box floor systems, for which the punctual supports must be placed at the reinforced edges of the hollow boxes. The arrangement of the columns and their spacing is thereby restricted by the production and shipping sizes of the box ceilings to rectangular grids. To overcome these design limi... |
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Hybrid timber-based structures: A state of the art review
https://www.sciencedirect.com/science/article/abs/... [Alternative/Hybrid Configurations] [Journal Article] 2022 Sofia Pastori, Enrico Sergio Mazzucchelli, Marita Wallhagen The construction of timber buildings has increased in recent years, thanks to the excellent properties of the material. To achieve improved behavior in terms of mechanical properties, energy and acoustic performance, fire resistance and durability, timber structures are sometimes integrated with other materials, such as concrete and steel, resulting in hybrid timber-based structures. ... |
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Bio-based Building Material Solutions for Environmental Benefits over Conventional Construction Products - Life Cycle Assessment of Regenerative Design Strategies (1/2)
https://assets.researchsquare.com/files/rs-2199019... [Markets] [Journal Article] 2022 Lise Mouton, Karen Allacker, Martin Röck The focus in reducing environmental impacts of buildings is shifting from the operational stage to the full life cycle, with particular attention to embodied greenhouse gas (GHG) emissions of construction materials. The application of bio-based construction materials is promoted for potentially reducing material-related embodied GHG and even enabling carbon xation. In part one of this study (1/2), we apply life cycle assessment (LCA) to critically examine regenerative design strategies, starting... |
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Finite Element Analysis of Dynamic Characteristics and Bending Stiffness for Cross Laminated Timber Floor Panels with and without Openings
https://pdfs.semanticscholar.org/5f23/286522fc5677... [Mechanical Performance] [Journal Article] 2021 Ljiljana Kozarić, Smilja Bursać, Martina Vojnić Purčar, Miroslav Bešević, Žikica Tekić The aim of this paper is to present numerical investigations of dynamic characteristics and bending stiffness for cross laminated timber floor panels with and without service openings. Five-layer panels with the outer layers oriented in the longitudinal direction of the panel have been analyzed. In order to explore the full potential of this floor system using a limited number of measurements and structural tests, models based on the finite element method have been proposed, validated against ex... |
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Effect of modelling the air in rooms on the prediction of vibration transmission in cross-laminated timber buildings
https://www.taylorfrancis.com/chapters/edit/10.120... [Vibration/Acoustic Performance] [Book/Book Section] 2022 O. Flodén, A. Peplow, P. Persson, L. Mangliár, L.V. Andersen In this paper, the necessity of modelling the enclosed air in room volumes of buildings made of cross-laminated timber, with respect to the prediction of vibration transmission, is investigated. Coupled structural-acoustic finite element analysis is employed for an example building structure. It is found that modelling the air in the receiver room, i.e. in the room where the vibration response is evaluated, has a marked effect on the vibration transmission between panels. ... |
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Depot Treatment
https://cwc.ca/why-build-with-wood/strong/durabili... [Moisture/Durability] [Web Page] Since depot treatment is localized, it is critical that it be placed in the right location, which requires an understanding of how moisture may get into the structure. Depot treatments are an excellent choice for a few common design applications such as partially exposed beams. ... |
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Test Method for Determining the In-Plane Shear Strength and Stiffness of CLT
https://research.thinkwood.com/en/permalink/catalo... [Raw Materials] [Conference Paper] 2016 Nygård, A., Björnfot, A., Tsalkatidis, T., Tomasi, R. The scope of this study is to evaluate the existing test methods for deciding the in-plane shear strength and stiffness of cross laminated timber (CLT) panels, and suggest a new test method. ... |
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Disproportionate collapse prevention analysis for a mid-rise flat-plate cross-laminated timber building
https://www.semanticscholar.org/paper/Disproportio... [Connectors] [Journal Article] 2019 Hercend Mpidi Bita, Thomas Tannert This research evaluated the probability of disproportionate collapse for a nine-storey mass timber building with a flat-plate Cross-laminated Timber floor system and Glued-laminated Timber columns. The alternate load-path analysis, a threat-independent method, was performed to quantify the damage-to-performance correlation. ... |
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Possibilities of Useful Use of Glued Wooden Construction Residues
https://pdfs.semanticscholar.org/bf22/ad4ef6cd8975... [Bonding/Adhesives] [Journal Article] 2021 Peteris Resnais, Aldis Grekis, Matiss Keivs, Baiba Gaujena, Tomasz Sadowski, Sérgio Manuel, Rodrigues Lopes Citation: Resnais, P.; Grekis, A.; Keivs, M.; Gaujena, B. Possibilities of Useful Use of Glued Wooden Construction Residues. Materials... |
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Seismic Behavior of Cross laminated Timber (CLT) Structural Systems: from Traditional Steel Connections to Low-Damage Solutions
https://www.semanticscholar.org/paper/d4281e410e25... [Seismic Performance] [Thesis/Dissertation] 2017 Milena Massari The first part of this study presents results from an extensive experimental campaign conducted on traditional connections for CLT buildings using a specific setup that allowed to impose prescribed levels of displacements in secondary direction, varying at the same time the main direction displacement in a cyclic and monotonic manner. A total of fifteen specimens, for each connection type, are presented and critically discussed in terms of load-displacement curves, strength, stiffness, energy di... |
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Cyclic performance of connections used in hybrid CLT
http://ir.library.oregonstate.edu/concern/graduate... [Connectors] [Thesis/Dissertation] 2017 Vahid Mahdavifar The main objective of this work is to characterize the performance of connection systems for hybrid CLT. This is achieved through testing and modeling of single fastener connections and then testing and modeling of the typical connection systems. So, the specific objectives are: (1) evaluate the single fasteners performance to account for density variation and compare the results to a proposed modified model, (2) perform an experimental program to test different connection systems with different... |
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Investigating the comprehensive toe of post-tensioned CLT core-walls using particle tracking theory
https://www.semanticscholar.org/paper/a66748520859... [Seismic Performance] [Journal Article] 2020 J. Brown, M. Li, R. Nokes, A. Palermo, S. Pampanin, F. Sarti Engineering Post-tensioned timber technology was originally developed and researched at the University of Canterbury (UC) in New Zealand in 2005. It can provide a low-damage seismic design solution for multi-storey mass timber buildings. Since mass timber products, such as cross-laminated timber (CLT), have high in-plane stiffness, a post-tensioned timber shear wall will deform mainly in a rocking mechanism.... |
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Behaviour factor for innovative massive timber shear walls
https://link.springer.com/content/pdf/10.1007/s105... [Mechanical Performance] [Journal Article] 2015 Luca Pozza, Roberto Scotta, Davide Trutalli, Andrea Polastri Four massive wooden shear walls were analysed via experimental tests and numerical simulations. The specimens differ mainly in the method used to assemble the layers of timber boards: two of them are the well-known Cross-Laminated-Timber panels with glued interfaces, the other two are innovative massive timber panels adopting steel staples or wooden dovetail inserts to connect the layers. Quasi-static cyclic-loading tests were performed for each wall and main results are presented and analysed. ... |
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What Is Cross-Laminated Timber (CLT)? | naturally:wood
http://www.naturallywood.com/products/cross-lamina... [General Information] [Web Page] 2022 naturally:wood Supplier Directory About Blog Events Careers Get Support Learning Centre Menu Sustainability Carbon + climate Forest management Forest certification Species Products Wood Performance Acoustic Durability Fire Health Resilience Thermal Value + versatility Design + Construction Hybrid-timber Light-frame Mass timber Prefabrication Projects Cross-laminated timber (CLT) The fabrication, uses, performance and sustainability of cross-laminated timber (CLT). Similar to other mass timber products, CLT pa... |
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Properties of axially loaded self-tapping screws with focus on application in hardwood
https://www.semanticscholar.org/paper/Properties-o... [Connectors] [Journal Article] 2019 R. Bradner The raising stock of hardwood and the increasing popularity to build with timber are strong drivers to use hardwood as structural material on a regular basis. Despite its outstanding mechanical properties, economic boundary conditions in producing structural hardwood products consequence, however, rather a niche application. Efficient fastener and joint solutions which are optimised for hardwood are one possible solution to increase the share of hardwood in structural applications. Within this c... |
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Strategies for structural modelling of CLT panels under cyclic loading condition
https://www.semanticscholar.org/paper/ffff4b6db053... [Seismic Performance] [Journal Article] 2019 Luca Franco, Luca Pozza, Anna Saetta, Marco Savoia, Diego Talledo Cross Laminated Timber (CLT) is an extensively used technology to build medium- and high-rise buildings, especially thanks to the rapidity of execution, environmental sustainability, and good mechanical performances. Since this material is presently employed also in seismic-prone areas, the assessment of numerical modelling strategies to reproduce the cyclic behavior of CLT-wall systems has become a relevant research topic within the structural engineering field. Two different modelling approach... |
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