Skip header and navigation

10 records – page 1 of 1.

Buildings Made of Dowel-Laminated Timber: Joint and Shear Wall Properties

https://research.thinkwood.com/en/permalink/catalogue1718
Year of Publication
2016
Topic
Mechanical Properties
Seismic
Connections
Material
DLT (Dowel Laminated Timber)
Application
Shear Walls
Author
Sandhaas, Carmen
Year of Publication
2016
Format
Conference Paper
Material
DLT (Dowel Laminated Timber)
Application
Shear Walls
Topic
Mechanical Properties
Seismic
Connections
Keywords
Joints
Load Carrying Capacity
Cyclic Tests
Energy Dissipation
Behaviour Factors
Numerical Models
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4589-4596
Summary
Dowel-laminated timber (DLT) elements consist of lamellae arranged side-by-side that are connected with beech dowels. Due to the glue-free DLT element layup, joints and shear walls potentially suffer from considerable reduction of stiffness and load carrying capacity as metal fasteners inserted perpendicular to the element plane may be placed in gaps between the single lamellae. Tests on typical joints showed that, depending on the fastener diameter, the remaining load carrying capacity of joints in DLT in comparison to joints in solid wood may be only 25%. Tests on DLT shear walls with different sheeting proved that the use of DLT structures as shear walls is only possible if at least one-sided sheeting is used. Cyclic tests on DLT shear walls demonstrated that the DLT construction typology has energy dissipation properties similar to traditional timber frame construction. Analogously, preliminary behaviour factors for DLT buildings evaluated with numerical models were also similar to those for timber frame buildings.
Online Access
Free
Resource Link
Less detail

Capacity and Reliability of LVL Beams Manufactured from Juvenile Hardwood Plantation Logs

https://research.thinkwood.com/en/permalink/catalogue2023
Year of Publication
2018
Topic
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)
Application
Beams
Author
Gilbert, Benoit
Bailleres, Henri
Zhang, Hao
McGavin, Robert
Organization
Griffith University
The University of Sydney
Year of Publication
2018
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Application
Beams
Topic
Mechanical Properties
Keywords
Plantation
Hardwood
Bending Strength
Numerical Models
Capacity
Juvenile Wood
Conference
World Conference on Timber Engineering
Research Status
Complete
Summary
This paper summarises parts of the research outcomes of a university-government collaborative project aiming at determining the capacity and reliability of veneer-based structural products manufactured from early to midrotation (juvenile) hardwood plantations logs. Two species planted for solid timber end-products (Eucalyptus cloeziana and Corymbia citriodora) and one species traditionally grown for pulpwood (Eucalyptus globulus) were studied for the manufacture of the new products. Focus of this paper is on LVL beams. To cost-effectively determine the nominal design bending strengths of the new beams, a numerical model was developed. The model was found to accurately predict the strength of LVL beams with an average predicted to experimental ratio of 1.00 with a low coefficient of variation of 0.10. Using an established probabilistic database of the material properties of the veneered resources as model input, Monte-Carlo simulations were then performed. The design strength of the new LVL beams was established and found to be comparable to, and in some cases up to 2.5 times higher than, the ones of commercially available softwood products. Recommendations are also made in the paper on the appropriate capacity factors to be used for various service categories of structures. The proposed capacity factors were found to be 5% to 12% lower than the ones currently used in Australia for beams manufactured from mature softwood logs
Online Access
Free
Resource Link
Less detail

Capacity Prediction for Glued-In FRP Joints

https://research.thinkwood.com/en/permalink/catalogue2022
Year of Publication
2018
Topic
Connections
Material
Glulam (Glue-Laminated Timber)
Author
Vallée, Till
Kaufmann, Marvin
Alter, Benjamin
Tannert, Thomas
Year of Publication
2018
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Topic
Connections
Keywords
Glued-In Rods
GFRP
Numerical Models
Capacity
Conference
World Conference on Timber Engineering
Research Status
Complete
Summary
Glued-in-rods (GiR) represent a class of joints being used in timber engineering that are mostly used to transfer axial loads in structural members with Glass Fibre Reinforced Polymers (G-FRP) increasingly being considered as rod material. The primary objective of the research presented herein was to apply a probabilistic capacity prediction method to timber joints with G-FRP GiR. The experimental campaign was specific in two ways: firstly, G-FRP rods were bonded into both ends of the timber block with both ends being tested to failure; and secondly, as opposed to most previous studies exhibiting stiff adhesives, a ductile Polyurethane with markedly non-linear behaviour was used. All material characterisation was performed with methods that can be reproduced by any standard laboratory equipment, to provide parameters for the subsequent numerical analyses. Based thereupon, a probabilistic method was used and provided reasonably accurate predictions of the joint capacities of 25 different geometrical GiR configurations. The probabilistic method was extended for realistic estimations of the experimental capacity scattering in form of upper and lower quantiles.
Online Access
Free
Resource Link
Less detail

CLT Buildings Laterally Braced with Core and Perimeter Walls

https://research.thinkwood.com/en/permalink/catalogue1663
Year of Publication
2016
Topic
Connections
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Author
Polastri, Andrea
Loss, Cristiano
Pozza, Luca
Smith, Ian
Year of Publication
2016
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Topic
Connections
Seismic
Keywords
Multi-Storey
Numerical Models
X-RAD
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 3706-3715
Summary
In this work the behaviour of hybrid multi-storey buildings braced with Cross-Laminated-Timber (CLT) cores and shear-walls is studied based on numerical analyses. Two procedures for calibrating numerical models are adopted and compared to test data and application of provisions in current design codes. The paper presents calibration of parameters characterising connections used to interconnect adjacent CLT panels and building cores, and attach shear-walls to foundations or floors that act as eleveted diaphragms. Different case studies are analysed comparing the structural responses of buildings assembled with „standard" fastening systems (e.g. hold-downs and angle-brackets), or using a special X-RAD connection system. The aim is to characterize behaviours of connections in ways that reflect how they perform as parts of completed multi-storey superstructure systems, rather than when isolated from such systems or their substructures. Results from various analyses are presented in terms of principal elastic periods, base shear forces, and uplift forces in buildings. Discussion addresses key issues associated with engineering analysis and design of buildings having around five or more storeys.
Online Access
Free
Resource Link
Less detail

Development of Adhesive Free Engineered Wood Products - Towards Adhesive Free Timber Buildings

https://research.thinkwood.com/en/permalink/catalogue2029
Year of Publication
2018
Topic
Connections
Design and Systems
Environmental Impact
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Author
Guan, Zhongwei
Sotayo, Adeayo
Oudjene, Marc
el Houjeyri, Imane
Harte, Annette
Mehra, Sameer
Haller, Peer
Namari, Siavash
Makradi, Ahmed
Belouettar, Salim
Deneufbourg, Franscois
Year of Publication
2018
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Topic
Connections
Design and Systems
Environmental Impact
Mechanical Properties
Keywords
Adhesives
Manufacturing
Compressed Wood
Four Point Bending Test
Numerical Models
Conference
World Conference on Timber Engineering
Research Status
Complete
Summary
Over 5 million m 3 of engineered wood products (EWPs) are produced in the EU annually and the market is rising. However, EWPs have a high degree of petrochemical use in their manufacturing. In addition, throughout the life span of these EWP products from manufacture to disposal, they emit formaldehyde and other volatile organic compounds (VOCs), which makes recycling very difficult. In this paper, preliminary experimental work on Adhesive Free Engineered Wood Products (AFEWPs) is presented, which covers (1) manufacture of compressed wood (CW) dowels, (2) fabrication of adhesive free laminated beams and connections, (3) structural testing of AFEWPs. Also, the finite element models are being developed to assist designing of AFEWPs in terms of size of compressed wood dowel and dowel patterns in order to maximise their stiffness and load carrying capacities.
Online Access
Free
Resource Link
Less detail

Fire Resistance of Laminated Veneer Lumber (LVL) and Cross-Laminated Timber (XLAM) Elements

https://research.thinkwood.com/en/permalink/catalogue97
Year of Publication
2012
Topic
Fire
Material
CLT (Cross-Laminated Timber)
LVL (Laminated Veneer Lumber)
Author
Menis, Agnese
Organization
University of Cagliari
Year of Publication
2012
Format
Thesis
Material
CLT (Cross-Laminated Timber)
LVL (Laminated Veneer Lumber)
Topic
Fire
Keywords
Numerical models
Finite element (FE) model
Abaqus
Testing
Research Status
Complete
Summary
This research investigates the fire behaviour of laminated veneer lumber elements and cross-laminated timber panels. The study focused on some research questions regarding the fire resistance of unprotected and protected timber structural elements, the possibility to predict accurately the fire behaviour of timber elements through numerical modelling, and the accuracy of analytical estimations of fire resistance using simplified design methods. Experimental tests of small and large specimens exposed to fire on one or more sides and subjected to different types and levels of load were performed. The results highlight the good performance of timber structural elements in fire conditions. The collected data were used to validate two- and three-dimensional models implemented in the general purpose finite element code Abaqus. Thermal and mechanical analyses were carried out to estimate the temperature distribution within unprotected and protected cross-sections of different sizes, the fire resistance and the displacement of timber elements loaded inplane and out-of-plane
Online Access
Free
Resource Link
Less detail

Fire Resistance Tests on Cross-Laminated Timber Floor Panels: An Experimental and Numerical Analysis

https://research.thinkwood.com/en/permalink/catalogue153
Year of Publication
2013
Topic
Fire
Material
CLT (Cross-Laminated Timber)
Application
Floors

Glued Timber-Concrete Beams – Analytical and Numerical Models for Assessment of Composite Action

https://research.thinkwood.com/en/permalink/catalogue154
Year of Publication
2013
Topic
Design and Systems
Serviceability
Material
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Beams
Author
Skec, Leo
Bjelanovic, Adriana
Jelenic, Gordan
Publisher
HRCAK
Year of Publication
2013
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Beams
Topic
Design and Systems
Serviceability
Keywords
Finite Element Model
Load Carrying Capacity
Loading
Numerical models
Short-term
Research Status
Complete
Series
Engineering Review
Summary
An analysis of glued composite timber-concrete systems is presented. Experimental data obtained from laboratory tests under short-term loading are compared with the analytical calculation and the design procedure for fully composite beams given in the EN 1995-1-1 standard. Numerical linear 2D finite element modelling and an analytical solution assuming linear elastic behaviour of glue and the interlayer slip are also conducted and validated. The effect of composite action in the three mentioned approaches is assessed by comparison of midspan deflections. In this way, a parametric study of the glue-line properties and the interlayer slip stiffness on load-carrying capacity and serviceability of glued composite beams exposed to short-time loading is easily performed.
Online Access
Free
Resource Link
Less detail

Structural Analysis of In-Plane Loaded CLT Beam with Holes: FE-Analyses and Parameter Studies

https://research.thinkwood.com/en/permalink/catalogue2236
Year of Publication
2016
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Beams

Structural Design and Modelling Method for the Post-Tensioned CLT Shear Wall Structures

https://research.thinkwood.com/en/permalink/catalogue2149
Year of Publication
2019
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Walls

10 records – page 1 of 1.