Mode Cross-Over and Ductility of Dowelled LVL and CLT Connections under Monotoni
https://www.researchgate.net/publication/324954180... [Connectors] [Journal Article] 2018
Lisa-Mareike Ottenhaus, Minghao Li, Tobias Smith, Pierre Quenneville
Accept Cookies top See all › 3 Citations See all › 15 References Download citation Share Facebook Twitter LinkedIn Reddit Request full-text Mode Cross-Over and Ductility of Dowelled LVL and CLT Connections under Monotonic and Cyclic Loading Article in Journal of Structural Engineering 144(7):04018074-1 · July 2018 with 169 Reads DOI: 10.1061/(ASCE)ST.1943-541X.0002074 Cite this publication Lisa Ottenhaus 8.09 University of Canterbury Minghao Li 20.17 University of Canterbury Tobias Smith Pierre...

Picture frame and diagonal compression testing of cross-laminated timber
https://link.springer.com/article/10.1617/s11527-0... [Mechanical Performance] [Journal Article] 2019
Jonas Turesson, Anders Björnfot, Sven Berg, Mats Ekevad, Roberto Tomasi
Currently, no appropriate standard exists that describes how to determine the in-plane shear stiffness for cross-laminated timber (CLT) panels, meaning that, there is a lack of appropriate and reliable test methods. In this paper, two gross shear test methods are evaluated: a picture frame test and a diagonal compression test, which are intended to measure the shear stiffness of a whole CLT panel. This evaluation aimed to compare the shear modulus, the amount of compression/tension in the diagon...

Timber buildings with enhanced energy and seismic performance for the Mediterranean region
https://www.researchgate.net/publication/307108558... [Seismic Performance] [Conference Paper] 2016
Julia Ratajczak, Daniel Garcia, Andrea Polastri, Giovanni Pernigotto, lessandro Prada, Marco Baratieri, Andrea Gasparella, Cristina Benedetti
Timber buildings are characterized by a thermal inertia lower than other technological solutions in construction. For this reason, some configurations may lead to higher cooling demand and poorer energy performance in hot climates, such as the Mediterranean ones. Possible improvement interventions often regard additional thermal mass but, if not accurately designed, they can worse significantly structural and seismic perfo rmance of timber buildings - which is of primary importance in many Itali...

Glued-in rods in cross laminated timber -Numerical simulations and parametric studies
https://www.researchgate.net/publication/332522971... [Connectors] [Journal Article] 2019
Boris Azinović, Henrik Danielsson, Erik Serrano, Miha Kramar
Numerical simulations and parametric studies of glued-in rods in cross-laminated timber have been performed. The simulations were based on 3D finite element analysis, using a cohesive surface model for the bond-lines between the laminations and the bond-line along the rod. The parametric studies investigated the influence of the glued-in length, the rod diameter, and the rod-to-grain angle on the load-bearing capacity and stiffness of the connection. The analyses showed that the load-bearing cap...

Cheat Lake House
http://www.lignaterra.com/work/cheat_lake_house/... [Case Study/Projects] [Web Page] 2018
LignaTerra
Private residence situated in the West Virginia countryside boasts an efficiency masterpiece by LignaTerra. Emphasizing a conscientious approach to development, the showcase home implemented an airtight Cross Laminated Timber envelope, low U-value European windows and doors, high-efficiency HVAC with heat recovery and air exchange systems, and full-system automation to control and promote the responsible construction technology available today....

Structural Connections for Massive Timber Plate Elements in Hybrid Structures
https://www.researchgate.net/publication/233635250... [Connectors] [Journal Article] 2008
Andi Asiz, Ian Smith
Discussion centres on connections between massive Cross-Laminated-Timber (XLam) floor slabs and steel skeletons of hybrid structures. Using the example of a 24-storey building, it is shown that such connections can be made using simple fasteners like large screws to enforce composite action in the critical case of XLam slabs acting as diaphragms during seismic or wind loading events....

Systematic experimental investigation to support the development of seismic performance factors for cross laminated timber shear wall systems
https://www.researchgate.net/publication/327058422... [Seismic Performance] [Journal Article] 2018
M. Omar Amini, John W. van de Lindt, Douglas Rammer, Shiling Pei, Philip Line, Marjan Popovski
In the US, codified seismic design procedure requires the use of seismic performance factors which are currently not available for CLT shear wall systems. The study presented herein focuses on the determination of seismic design factors for CLT shear walls in platform type construction using the FEMA P-695 process. Results from the study will be proposed for implementation in the seismic design codes in the US. The project approach is outlined and selected results of full-scale shear wall testin...

Capacity design of traditional and innovative ductile connections for earthquake-resistant CLT structures
https://link.springer.com/article/10.1007/s10518-0... [Connectors] [Journal Article] 2019
Davide Trutalli, Luca Marchi, Roberto Scotta, Luca Pozza
Traditional connections in earthquake-resistant cross-laminated timber buildings are susceptible of brittle failures, even when buildings are designed and supposed to be ductile. This is mainly due to the large underestimation of the actual strength of the ductile components, with consequent increased strength demand for the brittle parts, which may fail if designed with insufficient overstrength. Recent studies demonstrate that the use of steel connections characterized by a well-defined mechan...

Behaviour and modelling of cross-laminated timber panels with boundary connections subjected to blast loads
https://www.sciencedirect.com/science/article/pii/... [Other] [Journal Article] 2019
ChristianViau, Ghasan Doudak
This paper presents the experimental findings from a research program investigating the blast performance of cross-laminated timber (CLT) panels with idealized and realistic boundary conditions. A total of twenty-seven static and simulated blast tests were undertaken on 5-ply CLT panels with the aim to quantify the high strain-rate effects in the connections. Two types of CLT end connections were tested, namely a relatively thin off-the-shelf angle and a thicker in-house manufactured angle, both...

umerical simulation of fire integrity resistance of full-scale gypsum-faced cross-laminated timber wall
https://www.researchgate.net/publication/325780649... [Fire Performance] [Journal Article] 2018
Van Diem Thi, Mourad Khelifa, Marc Oudjene, Mohammed El Ganaoui, Yann Rogaume
Fire design requires three fire resistance criteria, namely integrity, insulation and load-bearing. In particular, repartition wall systems used in residential and commercial buildings are required to provide certification of insulation and integrity fire resistance and have to be analysed in the context of the characteristic time scales of a fire. This paper presents a numerical methodology to simulate the fire integrity resistance of full-scale timberbased wall systems exposed to fire. The mai...

Estudo do Dimensionamento das Lajes do Material Composto: Madeira Laminada Cruzada e Concreto
https://www.researchgate.net/publication/326957223... [Alternative/Hybrid Configurations] [Conference Paper] 2018
Silvia Teixeira, Gabriel De Oliveira Ribeiro Ribeiro, Vanesa Baño
Cross laminated timber panels (CLT) are formed by large-sized orthogonally arranged wood layers bonded with structural adhesive under high pressure. The cross arrangement sistem provides dimensional stability to the panel that works as a self-supporting structural element and are used as plates or closing walls in multi-floor constructions. The CLT slabs when combined with a top concrete layer on the upper surface have their structural behavior optimized for flexural stiffness, structure dynamic...

Multi-Storey Residential Timber Construction: Current Developments in Europe
https://www.researchgate.net/publication/275939415... [Tall Buildings] [Journal Article] 2007
Frank Lattke, Steffen Lehmann
This is a research paper with a focus on technical aspects of timber and on recent case studies, discussing the use of timber as multi-frame for multi-level residential buildings in Europe. The authors see this as a relevant topic within the context of the current environmental debate and the use of sustainable materials and construction methods. The conclusion suggests that timber is a high performance construction material adequate for multi-storey residential buildings, even in an urban conte...

Overstrength of dowelled CLT connections under monotonic and cyclic loading
https://rd.springer.com/content/pdf/10.1007%2Fs105... [Connectors] [Journal Article]
Lisa-Mareike Ottenhaus, Minghao Li, Tobias Smith, Pierre Quenneville
This paper presents an evaluation of overstrength based on an experimental study on dowelled connections in Cross Laminated Timber (CLT). Connection over-strength needs to be well understood in order to ensure that ductile system behaviour and energy dissipation can be achieved under seismic loading. Overstrength is defined as the difference between the code-based strength, using characteristic material strengths, and the 95th percentile of the true strength distribution. Many aspects contribute...

Finite Element Modelling of Heat and Moisture Transfer through Cross Laminated Timber Panels
https://ojs.cnr.ncsu.edu/index.php/BioRes/article/... [Moisture/Durability] [Journal Article] 2019
Jaya Tripathi, Robert William Rice
The primary objective of this research was to assess and to model the hygrothermal properties of CLT panels made from three distinct combinations of spruce lumber and laminated strand lumber (LSL). The hygrothermal performance of these materials both individually and in conjunction in CLT has not been investigated before and is an important indicator of CLT building wall performance. CLT panels consisting of spruce as a face layer absorbed moisture more rapidly when that face layer was exposed t...

Structural performance analysis of cross-laminated timber-bamboo (CLTB)
https://bioresources.cnr.ncsu.edu/resources/struct... [Raw Materials] [Journal Article] 2019
Maria I. M. Barreto, Victor De Araujo, Juliana Cortez-Barbosa, André L. Christoforo, Jorge D. M. Moura
Construction systems based on cross-laminated timber (CLT) have versatility in material development and are an interesting alternative for construction. This study evaluated the structural performance of cross-laminated timber-bamboo produced from wood (Pinus spp.) and bamboo (Dendrocalamus giganteus). Panels were produced by strips (wood and bamboo) assorted, under non-destructive structural grading, to support a better panel configuration. Small-length pine pieces were also included in the stu...

Evaluation of rolling shear modulus and strength of Japanese cedar cross-laminated timber (CLT) laminae
https://jwoodscience.springeropen.com/track/pdf/10... [Raw Materials] [Journal Article] 2019
Seiichiro Ukyo, Kenta Shindo, Atsushi Miyatake
Cross-laminated timber (CLT) panels are fabricated with their layers stacked crosswise. Owing to the low shear modulus and strength in the rolling shear direction, the shear properties of cross-layers infuence the overall defection and shear capacities of CLT panels. The aim of the present study is to determine the rolling shear properties of Japanese cedar and investigate how annual ring patterns and lamina geometry infuence shear properties. Using a test confguration similar to the standard sh...

Effect of Knots and Related Grain Deviation on the Rolling Shear in Dimension Lumber Used in Cross-Laminated Timber Transverse Core Layers
https://pinnacle-secure.allenpress.com/action/getS... [Mechanical Performance] [Journal Article] 2019
Thibault Grandvuinet,Lech Muszyński
Cross-laminated timber (CLT) technology has the potential for utilization of lower grades and underused species of lumber, because the core layers perpendicular to the principal loading direction transfer loads through shear, which is not correlated to the grade of lumber. Currently the product standard specifies the minimum grade requirements for all lumber to be used as CLT laminations. In this study, the effect of the presence of knots in the transverse core layer of CLT billets was examined ...

Life cycle assessment of a residential building with cross-laminated timber structure in Granada-Spain
http://informesdelaconstruccion.revistas.csic.es/i... [Environmental Performance] [Journal Article] 2019
R. Vidal, N. Sánchez-Pantoja, G. Martínez
A residential building with cross-laminated timber structure in Granada (Spain) was analyzed using the life cycle assessment methodology, life cycle energy analysis and sensitivity analysis to changes in efficiency of operating energy, materials database, transport distances and different scenarios for C&DW. The environmental impacts of the materials and construction production and embedded energy were relatively significant. The global warming impact category was very low due to the CO2 sequest...

BIM-Based Code Compliance Checking for Fire Safety in Timber Buildings: A Comparison of Existing Tools
http://amz.xcdsystem.com/A464D029-DBD8-FB0C-B034B8... [Fire Performance] [Conference Paper] 2019
Kristina Kincelova, Conrad Boton, Pierre Blanchet, Christian Dagenais
The nature and the complexity of building codes, including the fire regulations, result in mainly manual verification and, therefore, in subjective potential interpretations or errors. In the case of timber construction, the fire safety regulations are moreover a challenge due to the combustibility of the material. Further integration of fire safety is needed during the design process in order to increase the reliability of the designs in terms of fire safety. Building information modelling (BIM...

Evaluation of bending performance for cross laminated timber (CLT) made out of poplar (Populus alba)
http://www.ijwp.ir/article_21834_en.html... [Raw Materials] [Journal Article] 2017
Akbar Rostampour Haftkhani, Mohammad Layeghi, Ghanbar Ebrahimi, Kambiz Pourtahmasi
Bending strength is a critical property of cross laminated timber (CLT) in structural applications, especially in floor of multi-story buildings. Therefore, this study was targeted to evaluate bending strength of CLT made out of poplar (populous alba). Polyurethane adhesive was used for constructing of CLT (300 g/m2). The thickness of planks was used in this study was 16 mm. The results have indicated that modulus of rupture (MOR) and modulus of elasticity (MOE) of CLT with 45o alternating trans...