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8 records – page 1 of 1.

Dynamic Performance of Timber and Timber-Concrete Composite Flooring Systems

https://research.thinkwood.com/en/permalink/catalogue229
Year of Publication
2013
Topic
Connections
Serviceability
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Floors
Author
Rijal, Rajendra
Organization
University of Technology Sydney
Year of Publication
2013
Country of Publication
Australia
Format
Thesis
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Floors
Topic
Connections
Serviceability
Keywords
Connections
Costs
Fasteners
Finite Element Model
Long Span
Multi-Storey
Sustainability
Vibrations
Small Scale
Static Load Tests
Damage Index (DI) Method
Loss of Composite Action Index (LCAI)
Language
English
Research Status
Complete
Summary
The work presented in this thesis deals with the investigation of the dynamic performance of timber only and TCC flooring systems, which is one of the sub-objectives of the research focus at UTS. In particular, the presented research assesses the dynamic performance of long-span timber and TCC flooring systems using different experimental und numerical test structures. For the experimental investigations, experimental modal testing and analysis is executed to determine the modal parameters (natural frequencies, damping ratios and mode shapes) of various flooring systems. For the numerical investigations, finite element models are calibrated against experimental results, and are utilised for parametric studies for flooring systems of different sizes. Span tables are generated for both timber and TCC flooring systems that can be used in the design of long-span flooring systems to satisfy the serviceability fundamental frequency requirement of 8 Hz or above. To predict the fundamental frequency of various TCC beams and timber floor modules (beams), five different analytical models are utilised and investigated. To predict the cross-sectional characteristics of TCC systems and to identify the effective flexural stiffness of partially composite beams, the “Gamma method” is utilised. [...] two novel methods are developed in this thesis that determines the degree of composite action of timber composite flooring systems using only measurements from non-destructive dynamic testing. The core of both methods is the use of an existing mode-shape-based damage detection technique, namely, the Damage Index (DI) method to derive the loss of composite action indices (LCAIs) named as LCAI1 and LCAI2. The DI method utilises modal strain energies derived from mode shape measurements of a flooring system before and after failure of shear connectors. The proposed methods are tested and validated on a numerical and experimental timber composite beam structure consisting of two LVL components (flange and web). To create different degrees of composite action, the beam is tested with different numbers of shear connectors to simulate the failure of connection screws. The results acquired from the proposed dynamic-based method are calibrated to make them comparable to traditional static-based composite action results. It is shown that the two proposed methods can successfully be used for timber composite structures to determine the composite action using only mode shapes measurements from dynamic testing.
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European Cross-Laminated Timber Market: Industry Trends, Share, Size, Growth, Opportunity and Forecast 2018-2023

https://research.thinkwood.com/en/permalink/catalogue1956
Year of Publication
2018
Topic
Market and Adoption
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Organization
IMARC Group
Publisher
IMARC Services Pvt. Ltd.
Year of Publication
2018
Country of Publication
United States
Format
Report
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Market and Adoption
Keywords
Europe
Market Potential
Market Share
Costs
Residential
Education
Government
Commercial
Language
English
Research Status
Complete
Summary
The report has segmented the European CLT market on the basis of application. Some of the key application areas of CLT include educational institutes, residential, commercial spaces, and government and public buildings. On a regional basis, the report has segmented the market into Austria, Germany, Italy, Switzerland, Czech Republic, Spain, Norway, Sweden, United Kingdom and Others. Amongst these, Austria represents the largest producer accounting for the majority of the total production. Apart from the application sector and region, the European CLT market has also been segment on the basis of product type, element type, raw material type, bonding method, panel layers, adhesive type, press type, storey class and application type. The report provides historical as well as forecast trends for each of the above market segmentations. The report has also analysed the competitive landscape of the market with some of the key players being Binderholz, Stora Enso, KLH Massivholz, Mayr Melnhof and Hasslacher. ...
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Influence of Micro Structured Surface on the Bond Quality of Hardwood

https://research.thinkwood.com/en/permalink/catalogue454
Year of Publication
2014
Topic
Connections
Cost
Material
Glulam (Glue-Laminated Timber)
Author
Lehmann, Martin
Volkmer, Thomas
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Topic
Connections
Cost
Keywords
Beech
Delamination
Hardwood
Melamine Urea Formaldehyde
Production Costs
Micro-structure
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The state of the art requires a closed waiting time of about one hour for the beech glulam production. This has a negative influence on the production costs. Micro structured surfaces showed good performance in combination with coatings. The authors have performed tension-shear and delaminating test in order to investigate the influence of micro structured surfaces on the bond quality of hardwoods. The results are very promising and show clearly improved delaminating resistance for all tested adhesive. No closed waiting time was needed to achieve satisfying results using MUF in combination with beech.
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Free
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Life Cycle Assessment of a Post-Tensioned Timber Frame in Comparison to a Reinforced Concrete Frame for Tall Buildings

https://research.thinkwood.com/en/permalink/catalogue412
Year of Publication
2016
Topic
Environmental Impact
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Author
Cattarinussi, Laurent
Hofstetter, Kathrin
Ryffel, Rinaldo
Zumstein, K.
Ioannidou, Dimitra
Klippel, Michael
Year of Publication
2016
Country of Publication
Switzerland
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Topic
Environmental Impact
Keywords
Concrete
Sustainability
Life-Cycle Assessment
Post-Tensioned
Greenhouse Gases
Costs
Construction Time
Language
English
Conference
SBE Regional Conference
Research Status
Complete
Notes
June 15-17, 2016, Zurich, Switzerland
Summary
Consuming over 40% of total primary energy, the built environment is in the centre of worldwide strategies and measures towards a more sustainable future. To provide resilient solutions, a simple optimisation of individual technologies will not be sufficient. In contrast, whole system thinking reveals and exploits connections between parts. Each system interacts with others on different scales (materials, components, buildings, cities) and domains (ecology, economy and social). Whole-system designers optimize the performance of such systems by understanding interconnections and identifying synergies. The more complete the design integration, the better the result. In this book, the reader will find the proceedings of the 2016 Sustainable Built Environment (SBE) Regional Conference in Zurich. Papers have been written by academics and practitioners from all continents to bring forth the latest understanding on systems thinking in the built environment.
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North America Cross-Laminated Timber Market: Industry Trends, Share, Size, Growth, Opportunity and Forecast 2018-2023

https://research.thinkwood.com/en/permalink/catalogue1898
Year of Publication
2018
Topic
Market and Adoption
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Organization
IMARC Group
Year of Publication
2018
Country of Publication
United States
Format
Report
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Market and Adoption
Keywords
Market Share
Costs
Residential
Education
Government
Commercial
Market Potential
Language
English
Research Status
Complete
Summary
The report has segmented the market on the basis of application. Some of the key application areas of CLT include residential, educational institutes, government and public buildings, and commercial spaces. On a regional basis, the report has segmented the market into the US and Canada. The report has also analysed the competitive landscape of the market with some of the key players being Structurlam, Nordic Engineered Wood, SmartLam and Sterling Lumber. ...
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Passive Cross Laminated Timber Buildings

https://research.thinkwood.com/en/permalink/catalogue24
Year of Publication
2013
Topic
Energy Performance
Material
CLT (Cross-Laminated Timber)
Author
Helling, Håkan
Janols, Henrik
Brännström, Matias
Organization
Dalarna University
Year of Publication
2013
Country of Publication
Sweden
Format
Report
Material
CLT (Cross-Laminated Timber)
Topic
Energy Performance
Keywords
Climate
Concrete
Construction
Costs
Economic Analysis
Passive House
Language
English
Research Status
Complete
Summary
In this project, Stora Enso’s newly developed building system has been further developed to allow building to the Swedish passive house standard for the Swedish climate. The building system is based on a building framework of CLT (Cross laminated timber) boards. The concept has been tested on a small test building. The experience gained from this test building has also been used for planning a larger building (two storeys with the option of a third storey) with passive house standard with this building system.
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Potential for Tall Wood Buildings to Sequester Carbon, Support Forest Communities, and Create New Options for Forest Management

https://research.thinkwood.com/en/permalink/catalogue724
Topic
Environmental Impact
Market and Adoption
Cost
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Bergman, Richard
Kelley, Stephen
Organization
Forest Products Laboratory
Country of Publication
United States
Format
Report
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Environmental Impact
Market and Adoption
Cost
Keywords
Life Cycle Analysis
Carbon Sequestration
Financial Analysis
Life Cycle Costs
Economic Impact
Research Status
In Progress
Summary
The primary outcome of this work is to provide integrated analysis of the environmental, financial, and social benefits and costs of using CLT in tall wood buildings. Secondary outcomes will be (1) information, including a design team checkoff that can be used to inform the building community as they make decisions on specific, new building projects, and (2) an informational foundation for these stakeholders and others to begin to evaluate the complex tradeoffs between, and optimization of, environmental, financial, and social benefits and costs.
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Risk Minimization in RTS, with Application to FFTT Timber Construction

https://research.thinkwood.com/en/permalink/catalogue337
Year of Publication
2015
Topic
Design and Systems
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Hybrid Building Systems
Author
Larsen, Alfred
Organization
University of British Columbia
Year of Publication
2015
Country of Publication
Canada
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Hybrid Building Systems
Topic
Design and Systems
Seismic
Keywords
Costs
FFTT
Timber-Steel Hybrid
Analytical Model
Language
English
Research Status
Complete
Summary
The risk posed to a structure from an earthquake may be minimized by changing the design characteristics of the structure to determine the optimal design. A risk measure, the mean value of the cost functions in this thesis, can be determined using reliability methods to construct a loss curve. This formulation includes the effect of uncertainty in all aspects of the cost, including construction and repair given an event. This risk model also requires no prior information to determine the mean cost and does not define a discrete “failure,” instead using a continuum of possible outcomes in determining the mean of the cost functions. The optimization model allows for different search directions and step sizes in the search for the minimum cost, with steepest descent and BFGS search directions currently implemented. These analyses are performed using the Rts software, which has the capability of performing the optimization, risk, and reliability analyses on input structural models.
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Free
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8 records – page 1 of 1.