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10 records – page 1 of 1.

Experimental and Numerical Investigations of Fire Resistance of Novel Timber-Concrete-Composite Decks

https://research.thinkwood.com/en/permalink/catalogue891
Year of Publication
2013
Topic
Fire
Material
Timber-Concrete Composite
Application
Floors
Author
Meena, Rahul
Schollmayer, Martin
Tannert, Thomas
Publisher
American Society of Civil Engineers
Year of Publication
2013
Country of Publication
United States
Format
Journal Article
Material
Timber-Concrete Composite
Application
Floors
Topic
Fire
Keywords
Fire Resistance
Temperature
Language
English
Research Status
Complete
Series
Journal of Performance of Constructed Facilities
Summary
A wood-concrete composite deck is presented, where wooden beams are placed in the compression side and the concrete layer is in the tension side. The main motive for this unusual setup is the better fire resistance of the system. The composite system was investigated under fire conditions. Experimental investigations were conducted on a small section of the structure in order to analyze the behaviour of the system. The specimen was subjected to the ISO-834 standard temperature-time curve with the concrete slab exposed to fire. Subsequently, the experiment was modeled using a commercial software package, and a transient thermal analysis was performed with temperature dependent material properties. The temperature profiles for all the materials are adequately comparable from both the investigations, i.e. experimental and numerical. The validated numerical model allows modifying geometrical parameters and determining fire-resistance ratings of different system configurations.
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Experimental Research on Mechanical Properties of Laminated Poplar Wood Veneer/Plastic Sheet Composites

https://research.thinkwood.com/en/permalink/catalogue2500
Year of Publication
2019
Topic
Mechanical Properties
Design and Systems
Material
LVL (Laminated Veneer Lumber)
Other Materials
Application
Wood Building Systems

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

Experimental Investigation on the Fire Resistance of Glued-In Rod Timber Joints with Heat Resistant Modified Epoxy Resin

https://research.thinkwood.com/en/permalink/catalogue2665
Year of Publication
2020
Topic
Fire
Connections
Material
Glulam (Glue-Laminated Timber)
Author
Luo, Liquan
Shi, Benkai
Liu, Weiqing
Yang, Huifeng
Ling, Zhibin
Publisher
MDPI
Year of Publication
2020
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Topic
Fire
Connections
Keywords
Fire Resistance
Glued-In Rod Joint
Glued-In Rod Timber Joint
Pull-Out Test
Heat Resistant
Modified Epoxy Resin
Adhesive
Language
English
Research Status
Complete
Series
Materials
Summary
This paper presents an experimental evaluation of the fire resistance of glued-in rod timber joints using epoxy resin, with and without modification. A heat-resistant modified resin was designed by adding inorganic additives into the epoxy resin, aiming to improve the heat resistance. Joints that were made using the modified epoxy resin at room temperature showed a bearing capacity comparable to those with commercial epoxy resin. Twenty-one joint specimens with the modified epoxy resin and six with a commercial epoxy resin were tested in a fire furnace to evaluate the fire resistance. The main failure mode was the pull-out of the rod, which is typical in fire tests of this type of joints. As to the effects of the test parameters, this study considered the effects of adhesive types, sectional sizes, stress levels, and fireproof coatings. The test results showed that the fire resistance period of a joint can be evidently improved by modifying the resin and using the fireproof coating, as the improvements reached 73% and 35%, respectively, compared with the joint specimens with commercial epoxy resin. It was also found that, for all specimens, the fire resistance period decreased with an increase in the stress level and increased with an increase in the sectional sizes.
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Air-Coupled Ultrasound Propagation and Novel Non-Destructive Bonding Quality Assessment of Timber Composites

https://research.thinkwood.com/en/permalink/catalogue13
Year of Publication
2012
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Author
Martín, Sergio
Organization
ETH Zurich
Year of Publication
2012
Country of Publication
Switzerland
Format
Thesis
Material
Glulam (Glue-Laminated Timber)
Topic
Mechanical Properties
Keywords
Adhesives
Bonding
Delamination
Failure
Non-Destructive Testing
Air-coupled Ultrasound (ACU)
Finite-Difference Time-Domain (FDTD) model
Language
English
Research Status
Complete
Summary
Glued laminated timber (glulam) is manufactured by gluing and stacking timber lamellas, which are sawn and finger-jointed parallel to the wood grain direction. This results in a sustainable and competitive construction material in terms of dimensional versatility and load-carrying capacity. With the proliferation of glued timber constructions, there is an increasing concern about safety problems related to adhesive bonding. Delaminations are caused by manufacturing errors and in service climate variations simultaneously combined with long-sustained loads (snow, wind and gravel filling on flat roofs). Several recent building collapses were related to bonding failure, which should be prevented in the future with a timely defect detection. As an outlook, the feasibility of air-coupled ultrasound tomography was demonstrated with numerical tests and preliminary experiments on glulam. The FDTD wave propagation model was excited by the difference of the time-reversed sound fields transmitted through a test and a reference (defect-free) glulam cross-section. Both datasets were obtained with the same SLT setup. Wave convergences then provided a map of bonding defects along the height and width of the inspected glulam cross-sections. Further research is envisaged in this direction
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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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Thermo-Mechanical Behavior of Timber in Shear: An Experimental Study

https://research.thinkwood.com/en/permalink/catalogue505
Year of Publication
2014
Topic
Fire
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Author
Audebert, Maxime
Dhima, Dhionis
Bouchaïr, Abdelhamid
Racher, Patrick
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Topic
Fire
Mechanical Properties
Keywords
Shear Strength
Temperature
Reduction Factors
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The advanced calculation methods for wood structural elements in fire situations proposed by EN1995-1-2 provide reduction factors of wood strength according to the temperature. The values of these reduction factors given for compression and tension strength are relatively well documented. However, the reduction factors of wood shear strength with temperature were not studied. This study concerns experimental investigations conducted to characterize the evolution with temperature of the shear strength of wood. The tests are realized using a specific original specimen specially developed for this study. The experimental results allow evaluating the values given in EN1995-1-2.
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Experimental Testing of Wood-Steel-Wood Moment-Resisting Bolted Connections

https://research.thinkwood.com/en/permalink/catalogue1735
Year of Publication
2016
Topic
Connections
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Author
Salem, Sam
Petrycki, Adam
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Topic
Connections
Mechanical Properties
Keywords
Moment-Resisting
Bending
T-Stub
Moment Capacity
Bolts
Brittle
Failure Modes
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4793-4800
Summary
The outcomes of an experimental study aimed to investigate the structural behaviour of wood-steel-wood glulam frame moment-resisting connections that were subjected to static bending are presented in this paper. Each frame test assembly was consisted of two glulam beams simply supported at their far ends and were connected to an inversely-loaded...
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Fire Resistance of Large-Scale Cross-Laminated Timber Panels

https://research.thinkwood.com/en/permalink/catalogue2219
Year of Publication
2017
Topic
Fire
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Walls
Wood Building Systems
Author
Henek, Vladan
Venkrbec, Václav
Novotný, Miloslav
Publisher
IOP Publishing Ltd
Year of Publication
2017
Country of Publication
Czech Republic
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Walls
Wood Building Systems
Topic
Fire
Mechanical Properties
Keywords
Fire Resistance
European Standards
Language
English
Conference
World Multidisciplinary Earth Sciences Symposium
Research Status
Complete
Online Access
Free
Resource Link
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Fire Performances of Timber-Cold Formed Thin Steel Plate Composite Beam

https://research.thinkwood.com/en/permalink/catalogue1707
Year of Publication
2016
Topic
Fire
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Steel-Timber Composite
Application
Beams
Author
Izumi, Bunji
Tani, Atsuko
Toba, Nobuaki
Nakashima, Koichiro
Koshihara, Mikio
Yamanashi, Tomohiko
Kohno, Mamoru
Winter, Wolfgang
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Steel-Timber Composite
Application
Beams
Topic
Fire
Mechanical Properties
Keywords
Steel Plates
Combustion Tests
Numerical Simulation
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4454-4461
Summary
The concept of combining folded thin steel plates and glued laminated timber in the beam element to gain increased structural and fire performances was developed at the Institute of Structural Design and Timber Engineering (ITI) in Vienna University of Technology...
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10 records – page 1 of 1.