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46 records – page 1 of 5.

Adhesive-Bonded Timber-Concrete Composites - Experimental Investigation of Thermal-Hygric Effects

https://research.thinkwood.com/en/permalink/catalogue1519
Year of Publication
2016
Topic
Serviceability
Mechanical Properties
Material
Timber-Concrete Composite
Author
Seim, Werner
Eisenhut, Lars
Kühlborn, Sonja
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Timber-Concrete Composite
Topic
Serviceability
Mechanical Properties
Keywords
Climate
Long-term
Shear Strength
Deformation
Temperature
Moisture Content
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 597-605
Summary
The advantages of the two different building construction materials, timber and concrete, can be used effectively in adhesive-bonded timber-concrete composite constructions. The long-term behavior was investigated experimentally on small-scale shear and bond specimens under artificial, alternating climatic conditions and on fullscale specimens under natural climatic conditions for an application in construction practice. The development of the shear strength and the deformation behavior under permanent loads were studied, focusing on the different material behavior of wood and concrete regarding changes in temperature and moisture. The general applicability of adhesivebonded timber-concrete composites in construction practice was proved in the investigations.
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Adhesive Bonding of Timber and Glass in Load-Bearing Facades - Evaluation of the Ageing Behaviour

https://research.thinkwood.com/en/permalink/catalogue1742
Year of Publication
2016
Topic
Connections
Serviceability
Material
Timber-Glass Composite
Application
Hybrid Building Systems
Author
Nicklisch, Felix
Weller, Bernhard
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Timber-Glass Composite
Application
Hybrid Building Systems
Topic
Connections
Serviceability
Keywords
Adhesives
Façade
Load Bearing
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4913-4920
Summary
Wooden constructions are on the rise again – encouraged by a strong trend towards sustainable and resource efficient buildings. Load-bearing timber-glass composite elements – a novel concept to use the in-plane loadbearing potential of glass – could contribute to a more efficient use of materials in façades. The current study relates to...
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Ambient Vibration Testing and Modal Analysis of Multi-Storey Cross Laminated Timber Buildings

https://research.thinkwood.com/en/permalink/catalogue237
Year of Publication
2014
Topic
Acoustics and Vibration
Wind
Serviceability
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Reynolds, Thomas
Bolmsvik, Åsa
Vessby, Johan
Chang, Wen-Shao
Harris, Richard
Bawcombe, Jonathan
Bregulla, Julie
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Acoustics and Vibration
Wind
Serviceability
Keywords
Modal Properties
Multi-Storey
Damping
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The ambient movement of three modern multi-storey timber buildings has been measured and used to determine modal properties. This information, obtained by a simple, unobtrusive series of tests, can give insights into the structural performance of these forms of building, as well as providing information for the design of future, taller timber buildings for dynamic loads. For two of the buildings, the natural frequency has been related to the lateral stiffness of the structure, and compared with that given by a simple calculation. In future tall timber buildings, a new design criterion is expected to become important: deflection and vibration serviceability under wind load. For multi-storey timber buildings there is currently no empirical basis to estimate damping for calculation of wind-induced vibration, and there is little information for stiffness under wind load. This study therefore presents a method to address those gaps in knowledge.
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An Enhanced Beam Model for Glued Laminated Structures that takes Moisture, Mechano-sorption and Time Effects into Account

https://research.thinkwood.com/en/permalink/catalogue44
Year of Publication
2014
Topic
Moisture
Serviceability
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Ormarsson, Sigurdur
Steinnes, Jan
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Moisture
Serviceability
Keywords
Climate
Creep
Finite Element Model
Hygro-Mechanical
Long-term
Visco-Elastic
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
There is a need of more advanced analysis for studying how the long-term behaviour of glued laminated timber structures is affected by creep and by cyclic variations in climate. A beam theory is presented able to simulate the overall hygro-mechanical and visco-elastic behaviour of (inhomogeneous) glulam structures. Two frame structures subjected to both mechanical and cyclic environmental loading are analysed to illustrate the advantages the model involved can provide. The results indicate clearly both the (discontinuous) inhomogeneity of the glulam products and the variable moisture-load action that occurs to have a significant effect on deformations, section forces and stress distributions within the frame structures that were studied
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An Innovative Hybrid Timber Structure in Japan: Experiments on the Long Term Behavior in Beam

https://research.thinkwood.com/en/permalink/catalogue1767
Year of Publication
2016
Topic
Serviceability
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Uchimura, Kohei
Shioya, Shinichi
Hira, Tomoka
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Serviceability
Keywords
Long-term
Mechanosorption
Creep
Steel Bars
Epoxy
Japan
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 5234-5241
Summary
Hybrid composite glulam timber reinforced using deformed steel bars and epoxy resin adhesive (RGTSB), was significantly developed in Kagoshima University. A long term laboratory investigation on a 4.5-meter-span hybrid timber beam and a non-hybrid timber beam was started from August 2011. The beam was made of RGTSB and another was of conventional glulam timber...
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Design and Performance of High-Rise Structure using Ultra-Lightweight Cross Laminated Timber Floor System

https://research.thinkwood.com/en/permalink/catalogue2698
Year of Publication
2020
Topic
Mechanical Properties
Serviceability
Material
CLT (Cross-Laminated Timber)
Application
Floors
Author
Ahmed, Danish
Ayadat, Tahar
Asiz, Andi
Publisher
ISEC Press
Year of Publication
2020
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Floors
Topic
Mechanical Properties
Serviceability
Keywords
Tall Timber Buildings
Lateral Load
Lateral Deflections
Floor Diaphragm
Language
English
Conference
International Structural Engineering and Construction Conference
Research Status
Complete
Series
Proceedings of International Structural Engineering and Construction
Summary
The main objective of this paper is to study the structural performance of a high-rise structure when alternative lightweight material known as cross-laminated timber was used as a slab in floor system in lieu of conventional reinforced concrete slab. A numerical case study was conducted using a highly irregular RC frame building with its two 60-story towers joined at the top. Three major analyses were considered. First, modeling and analyzing the building with an RC slab was conducted to determine the design reference. Second, substituting the RC slab with the CLT slab was performed using the same building skeleton. Third, redesigning and optimizing the building skeleton with that CLT to observe skeleton material saving obtained using the same structural performance criteria. Major lateral loads applicable in the Eastern Province of Saudi Arabia were inputted. Strengths and serviceability requirements for floor diaphragm and lateral load resisting system were checked first before performing a comparative analysis between traditional RC and CLT slabs as floor diaphragm. The structural performance criteria to be used for comparative study between RC and CLT slabs included total drift, inter-story drift due to lateral loads, and base reactions. Structural periods and acceleration responses for each floor were investigated and contrasted with the existing building code. The foundation demand was also investigated based on the structural weight and reactions generated from the RC and CLT floor systems.
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Development of Steel-Wood Hybrid Systems for Buildings Under Dynamic Loads

https://research.thinkwood.com/en/permalink/catalogue845
Year of Publication
2012
Topic
Seismic
Design and Systems
Serviceability
Application
Hybrid Building Systems
Author
Stiemer, Siegfried
Tesfamariam, Solomon
Karacabeyli, Erol
Popovski, Marjan
Year of Publication
2012
Country of Publication
Chile
Format
Conference Paper
Application
Hybrid Building Systems
Topic
Seismic
Design and Systems
Serviceability
Keywords
Dynamic Loads
Timber-Steel Hybrid
Strength
Language
English
Conference
International Specialty Conference on Behaviour of Steel Structures in Seismic Areas
Research Status
Complete
Notes
January 9-11, 2012, Santiago, Chile
Summary
A steel-wood hybrid system furnishes not only aesthetically pleasing and sustainable hybrid structures but is superior in seismic applications due to the light weight, high resistance, and adjustable ductility. Such hybrid structural systems are not covered by any material and structural design standards that hinder the general implementation. For light structures, a builder’s guide to hybrid wood and steel connection details already exists in North America. Despite the obvious advantages, however, today’s applications of steel-wood hybrid structures have been limited. Rare hybrid buildings with a concentrically braced frame used for lateral load resistance with a glulam timber floor slab have been built as prototypes. The use of glulam floor slab led to a substantially reduced self-weight, compared with the reinforced concrete slab option. The lighter structure behaves superior in seismic events and has made wind loads the governing design case. The next generation steel-wood hybrid structures should optimally utilize each material. This paper describes a research program of the next generation wood-steel hybrid structures should optimally utilize each material. In detail the following development issues will be addressed: innovative hybrid steel-wood building systems, technical tools to predict structural responses of hybrid systems, design principles underpinning the definition of key code provisions related to strength and serviceability performance of hybrid buildings. It will be highlighted that potential structural problems at the design stage result from material incompatibilities. The constitutive properties of each material, hybrid-material, and joint properties reported in the literature will be used, or supplemented by findings from experimental work.
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Durability of Cross Laminated Timber Against Termite Damage

https://research.thinkwood.com/en/permalink/catalogue1967
Year of Publication
2018
Topic
Serviceability
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
França, Tamara S.F.A.
Stokes, C. Elizabeth
Tang, Juliet
Year of Publication
2018
Country of Publication
Japan
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Serviceability
Keywords
Subterranean Termites
Mass Loss
Visual Rating
Language
English
Conference
International Convention of Society of Wood Science and Technology
Research Status
Complete
Summary
Mass timber is a category of framing components that can be built with a variety of materials. Engineered wood products have become the backbone of the mass timber movement. Some of the most common mass timber structural elements used in buildings are glue-laminated beams (glulam), laminated veneer lumber (LVL) and cross laminated timber (CLT). However, wood is a natural material which is susceptible to decay and termite attack...
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Durability of Structural Laminated Veneer Lumber in Outdoor Use

https://research.thinkwood.com/en/permalink/catalogue1567
Year of Publication
2016
Topic
Serviceability
Material
LVL (Laminated Veneer Lumber)
Author
Furuta, Naoyuki
Hirabayashi, Yasushi
Miyauchi, Teruhisa
Narita, Toshiki
Lee, Wonwoo
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Topic
Serviceability
Keywords
Outdoor Exposure
Modulus of Rupture
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 1638-1645
Summary
This study aimed to investigate the durability of structural laminated veneer lumber (LVL) during outdoor use. We subjected LVL to outdoor exposure tests for 48 months; the tests were designed under the assumption of outdoor use such as temporary enclosure plates used in the construction field. The surfaces of the LVL specimens were painted, or preservatives were mixed with the adhesive in the glue line. Very slight changes were observed in the color of the specimens painted with solvent-born coatings. Modulus of rupture (MOR) in the flatwise direction after 48 months exposure was deteriorated to 60–80% of the initial value. The MOR in the edgewise direction was higher than that in the flatwise direction. The MOR values of the painted specimens were higher than those of the control specimens before 24 months of outdoor exposure, whereas after 36 months of exposure, the values of the painted specimens were almost equal to those of the control specimens. Shear strength retention was greater than MOR retention. We found that the face veneers of the specimens were deteriorated by outdoor exposure, whereas their inner layers were relatively sound.
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Dynamic Characteristics of Glulam Beam and Deck-Element Floors

https://research.thinkwood.com/en/permalink/catalogue1717
Year of Publication
2016
Topic
Acoustics and Vibration
Serviceability
Material
Glulam (Glue-Laminated Timber)
Application
Floors
Author
Mehdi Ebadi, Mohammad
Doudak, Ghasan
Smith, Ian
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Floors
Topic
Acoustics and Vibration
Serviceability
Keywords
Vibration Response
One-Way
Finite Element Model
Experimental
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4547-4554
Summary
Low amplitude cyclic vertical motions of flat floors that humans find unacceptable are commonly caused by impacts resulting from their own activities or those of other people. It is therefore a goal of engineering design to identify and avoid construction methods prone to creation of motions that make floors unserviceable for an intended type of building occupancy. In some instances use of engineered wood products as construction materials results in floors having unacceptable vibration performances. Usually this is because floors exhibit modal frequencies and mode shapes that cause human perceptory organs to resonate or accelerate. This paper addresses vibration response characteristics of one-way spanning floors constructed using widely spaced glulam beams and transverse glulam deck elements. The vehicles for gaining understanding of such systems are experiments and finite element models.
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46 records – page 1 of 5.