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10 records – page 1 of 1.

Comparison of Glulam Post-To-Beam Connections Reinforced by two Different Dowel-Type Fasteners

https://research.thinkwood.com/en/permalink/catalogue55
Year of Publication
2015
Topic
Connections
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
He, Minjuan
Liu, Hui-Fen
Publisher
ScienceDirect
Year of Publication
2015
Country of Publication
Netherlands
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Connections
Mechanical Properties
Keywords
Reinforcement
Rods
Seismic
Self-Tapping Screws
Moment Resistance
Language
English
Research Status
Complete
Series
Construction and Building Materials
Summary
In this paper, the performance improvement of glulam post-to-beam connections reinforced by plain round rods (PRRs) and self-tapping screws (STSs) were compared. Five non-reinforced post-to-beam bolted connections, five PRR-reinforcing connections and five STS-reinforcing connections were experimentally investigated under monotonic and low frequency cyclic loading. Their stiffness, ductility, moment resistance capacity, failure modes and seismic behavior were analyzed. The findings indicated that both of these two reinforcements could mitigate wood splitting, and change the failure mode from brittle failure to ductile failure. The maximum moment and failure rotation of PRR-reinforcing connection were increased by 29% and 6% respectively, compared with those of non-reinforced connection. In addition, those of STS-reinforcing connection increased by 86% and 145% respectively. Furthermore, the comparison of PRR-reinforcing and STS-reinforcing connections indicated that the connection ductility reinforced by self-tapping screws enhanced more significantly; 106% higher than that of PRR-reinforcing connection. Moreover, under the low frequency cyclic loading, PRR-reinforcing and STS-reinforcing connections dissipated more energy (336% and 641% respectively) with a lower stiffness degeneration rate and a higher equivalent viscous damping ratio than those of non-reinforced connection. Besides, the dissipation energy and equivalent viscous damping ratio of STS-reinforcing connection were larger than those of PRR-reinforcing connection.
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Connections with Threaded Rods in Moment Resisting Frames

https://research.thinkwood.com/en/permalink/catalogue1495
Year of Publication
2016
Topic
Mechanical Properties
Connections
Material
CLT (Cross-Laminated Timber)
Application
Frames
Author
Arne Malo, Kjell
Stamatopoulos, Haris
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Frames
Topic
Mechanical Properties
Connections
Keywords
Moment Resistance
Threaded Rods
Beam Column Connection
Rotational Stiffness
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 200-208
Summary
Building owners often state requirements that new buildings shall have open and flexible architecture in order to allow flexible use and future changes. A way to improve timber buildings in that direction is to increase the stiffness of the connections between horizontal and vertical members of the structural systems. This paper presents some numerical and analytical considerations with respect to the stiffness requirements for moment resisting timber connections. It also presents experimental tests and results for a moment resisting connection with inclined threaded rods installed in predrilled holes.
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Design and Behavior of a Mid-Rise Cross-Laminated Timber Building

https://research.thinkwood.com/en/permalink/catalogue242
Year of Publication
2012
Topic
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Lenon, Conor
Organization
Colorado School of Mines
Year of Publication
2012
Country of Publication
United States
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Seismic
Keywords
Finite Element Model
Shake Table Test
Full Scale
Moment Resistance
Language
English
Research Status
Complete
Summary
Cross-Laminated Timber (CLT) is a new engineered wood material that was introduced in the past decade as a promising candidate to build structures over 10 stories. So far, a handful of tall CLT buildings have been built in low seismic regions around the world. Full-scaled seismic shaking table tests revealed the vulnerability of this building type when resisting seismically-induced overturning. This study proposes a new analysis and design approach for developing overturning resistance for platform CLT buildings. New structural detailing is proposed to alter the moment-resisting mechanism and ...
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Evaluation of the Structural Behaviour of Beam-Beam Connection Systems Using Compressed Wood Dowels and Plates

https://research.thinkwood.com/en/permalink/catalogue2050
Year of Publication
2018
Topic
Connections
Material
Glulam (Glue-Laminated Timber)
Application
Beams

Mechanical Behavior of Bolted Glulam Beam-to-Column Connections with Slotted-In Steel Plates Under Pure Bending

https://research.thinkwood.com/en/permalink/catalogue1503
Year of Publication
2016
Topic
Connections
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Columns
Author
Wang, Mingqian
Song, Xiaobin
Gu, Xianglin
Wu, Yajie
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Columns
Topic
Connections
Mechanical Properties
Keywords
Full Scale
Bolted Connection
Beam-to-Beam
Beam-to-Column
Steel Plates
Finite Element Model
Failure Modes
Moment Resistance
Continuum Damage Mechanics
Brittle Failure
Ductile Failure
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 309-316
Summary
In this study, five full-scale bolted glulam beam-to-beam connections with slotted-in steel plates were conducted under a third-point loading, and a three-dimensional finite element method based model was also established to investigate the failure modes and moment resistance of such connections. A material model based on the Continuum Damage Mechanics (CDM) theory was developed to predict damage evolution of wood. Different damage variables were used to consider the ductile and brittle failure modes of wood, respectively. The test results indicated that splitting and shear plug failures were the main failure modes. The numerical analysis model prediction achieved fair agreements with the test results. The research could provide the guide for the design of bolted beam-to-column connections in heavy timber structures.
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Moment Resistance of Post-And-Beam Joints with Concealed Metallic Connectors

https://research.thinkwood.com/en/permalink/catalogue621
Year of Publication
2014
Topic
Connections
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Humbert, Jérôme
Lee, Sang-Joon
Park, Joo-Saeng
Park, Moon-Jae
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Connections
Mechanical Properties
Keywords
Moment Resistance
Post and Beam
Joints
Metallic Connectors
Monotonic
Reverse Cyclic Loading
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
This paper presents a study on the moment resistance of post-and-beam joints with concealed metallic connectors aimed at replacing in a more modern design the wood-wood joints of traditional Korean Hanok timber houses. Several variations of the design of the connectors are investigated to optimize the moment resistance of the joints. Experimental tests are conducted under monotonic and reversed cyclic loading. The performance of the joint is evaluated in terms of peak moment resistance, as well as ductility and energy dissipation. Results show that optimization in the design can improve the moment resistance of the joint while preventing the brittle wood fracture and favoring a more ductile plasticizing of the connector, for the benefit of safety.
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Performance of Semirigid Timber Frame with Lagscrewbolt Connections: Experimental, Analytical, and Numerical Model Results

https://research.thinkwood.com/en/permalink/catalogue201
Year of Publication
2015
Topic
Connections
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Mori, Takuro
Nakatani, Makoto
Tesfamariam, Solomon
Publisher
Springer Berlin Heidelberg
Year of Publication
2015
Country of Publication
Germany
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Connections
Mechanical Properties
Keywords
Lag Screws
Beam-to-Column
Moment Resistance
Stiffness
Finite Element Model
Analytical Model
Numerical Model
Language
English
Research Status
Complete
Series
International Journal of Advanced Structural Engineering
ISSN
2008-6695
Summary
This paper presents analytical and numerical models for semirigid timber frame with Lagscrewbolt (LSB) connections. A series of static and reverse cyclic experimental tests were carried out for different beam sizes (400, 500, and 600 mm depth) and column–base connections with different numbers of LSBs (4, 5, 8). For the beam–column connections, with increase in beam depth, moment resistance and stiffness values increased, and ductility factor reduced. For the column–base connection, with increase in the number of LSBs, the strength, stiffness, and ductility values increased. A material model available in OpenSees, Pinching4 hysteretic model, was calibrated for all connection test results. Finally, analytical model of the portal frame was developed and compared with the experimental test results. Overall, there was good agreement with the experimental test results, and the Pinching4 hysteretic model can readily be used for full-scale structural model.
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Post-Tensioned Timber Frame Structures

https://research.thinkwood.com/en/permalink/catalogue63
Year of Publication
2015
Topic
Connections
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Columns
Author
Wanninger, Flavio
Organization
ETH Zurich
Year of Publication
2015
Country of Publication
Switzerland
Format
Thesis
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Columns
Topic
Connections
Keywords
Moment Resistance
Economical
Timber Joints
Moment-Rotation
Bending Test
Pushover Test
Numerical Modeling
Language
English
Research Status
Complete
Summary
The present research report was written as a PhD thesis (ETH Dissertation Nr. 22815) by Flavio Wanninger and shows the results of a comprehensive experimental and numerical analysis on the structural behaviour of post-tensioned timber frame, in particular with focus on the momentrotation-behaviour of the developed post-tensioned beam-column timber joint using hardwood and the long-term behaviour of the system. The results of the experimental and numerical investigations provide reliable data for the development and validation of calculation models for the design of post-tensioned timber frames with hardwood for vertical and horizontal loads and taking into account the long-term behaviour. The objective of the research project is the development and implementation of post-tensioned timber frame structures into the practice and fits well into the overall research strategy of the institute on the development of innovative solutions for timber structures.
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Salvaged Lumber for Structural Mass Timber Panels: Manufacturing and Testing

https://research.thinkwood.com/en/permalink/catalogue2470
Year of Publication
2020
Topic
Design and Systems
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Arbelaez, Raphael E.
Schimleck, Laurence
Sinha, Arijit
Publisher
Society of Wood Science and Technology
Year of Publication
2020
Country of Publication
United States
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Design and Systems
Mechanical Properties
Keywords
Bending Moment
Salvaged Lumber
Stiffness
Moment Resistance
Shear Resistance
Wood Failure
Delamination
Language
English
Research Status
Complete
Series
Wood and Fiber Science
Online Access
Free
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Structural Performance of Portal Frame Constructed with Japanese Cedar Glulam

https://research.thinkwood.com/en/permalink/catalogue698
Year of Publication
2014
Topic
Design and Systems
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Author
Yeh, Min-Chyuan
Lin, Yu-Li
Deng, Shu-Yu
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Topic
Design and Systems
Mechanical Properties
Keywords
Cedar
Portal Frame
Lateral Cyclic Load
Pins
Moment Resistance
Stress Distribution
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
Feasibility of using rapid grown Japanese cedar glulam for constructing a portal frame was examined. A 2500x3000-mm portal frame was constructed with 140x305-mm glulam members and subjected to a lateral cyclic load. The connections between post and beam members were fastened with 8 16-mm pins. Resulted moment resistance of the frame fastened with pins in square placement performed better than that with in circular placement. While the inserted metal plate in L-type showed higher initial stiffness and energy absorption than that in straight metal plate. The stress distribution of glulam post indicated shifts of neutral axis and deflection point as the cyclic load increases.
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10 records – page 1 of 1.