Predicting Vibration Behaviour of Cross Laminated Timber Floors
https://www.semanticscholar.org/paper/Predicting-V... [Vibration/Acoustic Performance] [Journal Article] 2015
Ebenezer Ussher, I. Smith
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STUDY OF THE FIRE PERFORMANCE OF HYBRID STEEL-TIMBER CONNECTIONS WITH FULL-SCALE TESTS AND FINITE ELEMENT MODELLING
https://www.researchgate.net/publication/291186475... [Fire Performance] [Conference Paper] 2016
Aaron O. Akotuah, Sabah G. Ali, Jeffrey Erochko, Xia Zhang, George V. Hadjisophocleous
Connection design is critical in timber buildings since the connections tend to have lower strength than the structural members themselves and they tend to fail in a brittle manner. The effect of connection geometry on the fire performance of a hybrid steel-timber shear connection is investigated by full-scale testing. These tests were conducted by exposing the test specimens to the standard time-temperature curve defined by CAN/ULC-S101 (CAN/ULC-S101, 2007). Test results showed that the fire re...

Cyclic testing and simulation of Hold-Down connections in radiata pine CLT shear walls
https://www.researchgate.net/publication/321757610... [Connectors] [Conference Paper] 2016
Benedetti, Franco & Rosales, Víctor & Opazo-Vega, Alexander
Structures built with cross laminated timber (CLT) are an attractive alternative to traditional construction materials in terms of environmental performance and habitability, but its structural behavior is not well understood for each timber specie. This work provides a comprehensive study of the structural behavior of radiata pine CLT shear walls, by means of laboratory testing and numerical analysis of hold down connections. The observed test response of connections is replicated by calibratin...

Cross-Laminated Timber (CLT) - The Canadian Wood Council - CWC : The Canadian Wo
https://cwc.ca/how-to-build-with-wood/wood-product... [General Information] [Web Page] 2022
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...

(PDF) PARAMETRIC STUDY OF MODELLING STRUCTURAL TIMBER IN FIRE WITH DIFFERENT SOF
https://www.researchgate.net/publication/267840019... [Fire Performance] [Journal Article] 2012
Werther, Norman & Neill, & Spellman, Phillip & Abu, Anthony & Moss, P.J. & Buchanan, Andrew & Winter, Stefan
In a bid to accurately model structural behaviour of timber buildings in fire, a number of obstacles have been identified which must be fully understood before advanced computer modelling can accurately be used to represent physical behaviour. This paper discusses the obstacles, with suggestions on how to mitigate them, incorporating the challenges of using general purpose finite element software. The paper examines modelling with ANSYS, SAFIR and ABAQUS and the individual and collective challen...

Withdrawal stiffness of threaded rods embedded in timber elements
https://www.researchgate.net/publication/301955173... [Connectors] [Journal Article] 2016
Stamatopoulos, Haris & Malo, Kjell
In the present paper, the withdrawal stiffness of axially loaded threaded rods screwed into timber elements is investigated using theoretical, numerical and experimental methods. The theoretical approach is based on the application of classical Volkersen theory on axially loaded connectors. An experimental investigation of withdrawal of threaded rods from glulam elements is presented. The parameters of this investigation are the embedment length and the angle between the rod axis and the grain d...

Fire-Induced Delamination of Cross-Laminated Timber
https://www.researchgate.net/publication/308653056... [Fire Performance] [Conference Paper] 2015
Bartlett, Alastair & Gajewski, Kuba & Hadden, Rory & Butterworth, Neal & Bisby, Luke
Conference PaperPDF Available Fire-Induced Delamination of Cross-Laminated Timber October 2015 Conference: 1st European Workshop Fire Safety of Green Buildings At: Berlin, Germany Authors: Alastair Bartlett The University of Edinburgh Kuba Gajewski Kuba Gajewski This person is not on ResearchGate, or hasnt claimed this research yet. Bartlett Fire-Induced Delamination of Cross-Laminated Timber Alastair Bartlett1, Kuba Gajewski1, Rory Hadden1, Neal Butterworth2, Luke Bisby1 1 School of Engineerin...

Opportunity Knocks…on Wood : Local project exhibits first-of-its-kind structureL
https://www.fpl.fs.fed.us/labnotes/?p=1522... [Markets] [Report] 2013
Rebecca Wallace
Research at FPL often works toward moving new or improved wood products into mainstream use. Cross-laminated timber (CLT) is one such product. CLT is a solid panel made of bonded layers of lumber intended for roof, floor, or wall applications. It is a highly “green” material made from an abundant renewable resource; it also sequesters carbon, has low embodied energy, and has excellent aesthetic, structural, and thermal properties....

Timber-concrete composite structures in fire conditions - Finite Element numerical modelling of tensile tests
https://www.researchgate.net/publication/328415167... [Fire Performance] [Conference Paper] 2018
Bedon, Chiara & Fragiacomo, Massimo
The structural behavior of Timber‐Concrete Composite (TCC) slabs, as known, is mainly governed by the load‐bearing capacity of the metal connection between timber and concrete components. There, a key role is assigned to possible changes in stiffness and strength, especially for TCC systems exposed to fire loading. While simplified formulae are available in the literature for the calculation of strength and stiffness properties of screwed connections, most of the influencing parameters for TCC s...

Moisture conditions of rain-exposed glue-laminated timber members: the effect of different detailing
https://www.semanticscholar.org/paper/Moisture-con... [Moisture/Durability] [Journal Article] 2018
J. Niklewski, T. Isaksson, E. Frühwald Hansson, S. Thelandersson
In performance-based durability design, relating the in-use conditions of wooden members to their moisture content is an important step. In the present study, the effects of detail design on the wood moisture content of glulam members are investigated experimentally. The moisture content of glulam members, designed with various connection details and structural protection, was monitored at 18 different measuring points (n = 3) by use of resistance-type moisture sensors for a period of a year. Th...

Fire protection of light and massive timber elements using gypsum plasterboards and wood based panels: A large-scale compartment fire test
http://clok.uclan.ac.uk/31939/1/31939%20Asimakopou... [Fire Performance] [Journal Article] 2014
Dionysios I Kolaitis, Eleni K Asimakopoulou, Maria A Founti
A full-scale compartment fire test was performed to assess gypsum plasterboards and wood based panels as cladding materials for the fire protection of light and massive timber elements. The test compartment was constructed using both the Timber Frame and the Cross Laminated Timber techniques; a wood crib was used to achieve realistic fire conditions. Temperature measurements and optical inspection evidence suggested that gypsum plasterboards offered adequate fire protection since they did not fa...

TIMBER CORE-WALLS FOR LATERAL LOAD RESISTANCE OF MULTI-STOREY TIMBER BUILDINGS
https://static.sched.com/hosted_files/wcte2014/36/... [Seismic Performance] [Conference Paper] 2014
Andrew Dunbar, Daniel Moroder, Stefano Pampanin, Andrew Buchanan
This paper describes the results of experimental tests on post-tensioned Cross-Laminated Timber (CLT) core-walls tested under bi-directional quasi-static seismic loading. The half-scale two-storey test specimens included a stair with half-flight landings. The use of CLT panels for multi-storey timber buildings is gaining popularity throughout the world, especially for residential construction. Post-tensioned timber core-walls for lift-shafts (elevator shafts) or stairwells can be used as tubular...

Brock Commons Design + Preconstruction Overview Case Study
https://www.naturallywood.com/resources/brock-comm... [Case Study/Projects] [Report] 2016
Naturally:wood
The University of British Columbia is located on a forested peninsula on the west side of Vancouver. It is a community of academic, residential, commercial, and agricultural functions and facilities, with a strong focus on sustainability and the integration of research, teaching, and operations. In order to provide more housing, reduce commuting, and nurture a more sustainable and vibrant community, the University is developing campus hubs. These mixed-use high-rise hubs consist of student housi...

Experimental Investigation of Cross-Laminated Timber Shear Wall Under Shear Force by Using Digital Image Correlation Method
http://link.springer.com/10.1007/978-3-319-91989-8... [Mechanical Performance] [Journal Article] 2018
Tzu-Yu Kuo, Wei-Chung Wang, Chih-Hsien Lin,Te-Hsin Yang
At the beginning of the 20th century, a new wood manufacturing technology, i.e. cross-laminated timber (CLT), was started. In Taiwan, the manufacturing technology of CLT has just started recently. For the sake of safety, the information of stiffness and strength of the shear wall of the CLT are essential for structural designs. In this paper, by following the method B (ISO 16670 Protocol) of ASTM standard E2126-11, shear test of a real-scale CLT shear wall was performed. The measured shear modul...

Dynamic Characterization of Timber Floor Subassemblies: Sensitivity Analysis and Modeling Issues
https://ascelibrary.org/doi/full/10.1061/%28ASCE%2... [Vibration/Acoustic Performance] [Journal Article] 2021
Dag Pasquale Pasca, Angelo Aloisio, Massimo Fragiacomo, Roberto Tomasi
Timber floors are prone to exhibit vibration levels, which can cause discomfort to the occupants. In the last 20  years, ambient vibration tests have become very popular due to the many advantages they have over traditional forced vibration tests when dealing with civil engineering structures. Furthermore, sensitivity analyses and black-box” optimization algorithms can support the development of refined finite-element models that accurately predict the structures’ responses based on the experime...

Determination of the dispersion relation in cross-laminated timber plates: Benchmarking of time- and frequency-domain methods
https://www.sciencedirect.com/science/article/pii/... [Vibration/Acoustic Performance] [Journal Article] 2021
F. Morandia, A. Santoni, P. Fausti, M. Garai
The availability of a reliable estimate of the dispersion relation of plates is of great importance for acoustic modelling. Several experimental methods for the extraction of wavenumber and wave velocity information are discussed in the literature. They differ, among other factors, by the sensitivity to noise and multiple reflections, frequency range of application and implementation of the processing algorithm. While for homogeneous thick or thin plates well-established analytical solutions are...

Mechanical properties of connections between glued-laminated and cross-laminated timber elements with inclined self-tapping screws
https://ntnuopen.ntnu.no/ntnu-xmlui/handle/11250/2... [Connectors] [Thesis/Dissertation] 2020
Huus-Hansen, Hallvard; Tenold Fridtun, Sigurd
This thesis aims to investigate and assess the mechanical properties of connections between Cross-Laminated Timber (CLT) panels and glued laminated timber (glulam) elements with self-tapping inclined screws as fasteners. This was achieved through experimental tests, numerical simulations and analytical estimations. The study was conducted in context of the research project Woodsol, which aims to develop a structural system entirely from timber components, based on moment resisting frames and com...

Additive Timber Manufacturing: A Novel, Wood-Based Filament and Its Additive Robotic Fabrication Techniques for Large-Scale, Material-Efficient Construction
https://www.liebertpub.com/doi/full/10.1089/3dp.20... [Other] [Journal Article] 2021
Philipp Eversmann, Julian Ochs, Jannis Heise, Zuardin Akbar, Stefan Böhm
Additive manufacturing (AM), as resource-efficient fabrication processes, could also be used in the dimensions of the construction industry, as a variety of experimental projects using concrete and steel demonstrate. In timber construction, currently few additive technologies have been developed having the potential to be used in large scale. Currently known AM processes use wood in pulverized form, losing its inherent structural and mechanical properties. This research proposes a new material t...

Seismic Analysis and Design Of A 12-Storey Hybrid Timber Structure Combining LVL Frames, CLT Rocking Walls And Brb And SMA Steel Braces
https://www.researchgate.net/publication/353830931... [Alternative/Hybrid Configurations] [Conference Paper] 2021
Ricardo Rubio, Patricio Quintana Gallo, David Marc Carradine
This paper presents the seismic design and analysis of a 12-storey seismic-resistant hybrid timber structure comprising of a mix of Laminated Veneer Lumber (LVL) frames braced with Buckling Restrained Braces (BRB) and steel braces equipped with Shape Memory Alloy (SMA) devices, and Cross Laminated Timber (CLT) post-tensioned walls. The prototype structures are analysed and designed according to the Chilean seismic standard NCh433. It was found that despite using a rather small reduction factor f...

Experimental investigation and analytical model of cross-laminated timber wall with coupled U-shaped flexural plate connectors
https://www.sciencedirect.com/science/article/abs/... [Connectors] [Journal Article] 2021
Binhui Lu, Weidong Lu, Mingming Zhong, Weiqiang Wu, Peng Zhou
The hold-downs and angle brackets are always used for cross-laminated timber (CLT) wall system, owing to its easy installation. However, if the nails or screws used to connect hold-downs and CLT walls generated a certain plastic deformation though the whole CLT wall system did not collapse after small or moderate earthquake, such connectors can not be replaced easily, which lead to the unsafety of the whole CLT structure building. To achieve the requirements of energy dissipation, easy installat...