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219 records – page 1 of 11.

Failure Modes and Mechanical Properties of Bracket Anchor Connections for Cross-Laminated-Timber

https://research.thinkwood.com/en/permalink/catalogue2152
Year of Publication
2019
Topic
Connections
Mechanical Properties
Seismic
Material
CLT (Cross-Laminated Timber)
Application
General Application

Experimental Investigations of Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

https://research.thinkwood.com/en/permalink/catalogue2295
Year of Publication
2019
Topic
Design and Systems
Connections
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
General Application

Coupling Effects of CLT Connections Under Bi-axial Loading

https://research.thinkwood.com/en/permalink/catalogue2285
Year of Publication
2019
Topic
Connections
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
General Application
Author
Liu, Jingjing
Publisher
University of British Columbia
Year of Publication
2019
Country of Publication
Canada
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
General Application
Topic
Connections
Keywords
Shear Force
Tension
Mid-Rise
Language
English
Research Status
Complete
Online Access
Free
Resource Link
Less detail

Modeling the Coupling Effect of CLT Connections Under Bi-Axial Loading

https://research.thinkwood.com/en/permalink/catalogue2366
Year of Publication
2019
Topic
Connections
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
General Application
Author
Liu, Jingjing
Lam, Frank
Foschi, Ricardo
Li, Minghao
Year of Publication
2019
Country of Publication
United States
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
General Application
Topic
Connections
Keywords
Coupling Effect
Biaxial loading
Degradation
Modeling
Language
English
Research Status
Complete
Series
Journal of Structural Engineering
Summary
This paper presents the modeling of coupling effect of tension and shear loading on Cross Laminated Timber (CLT) connections using a finite element based algorithm called HYST. The model idealizes the connections as a “Pseudo Nail” - elastoplastic beam elements (the nail) surrounded by compression-only spring elements (steel sheath and wood embedment). A gap size factor and an unloading stiffness degradation index of the spring elements under cyclic loading were integrated into the optimized HYST algorithm to consider the coupling effect. The model was calibrated to compare with 32 configurations of CLT angle bracket and hold-down connections tests: in tension with co-existent constant shear force, and in shear with co-existent tension force. The results showed that the proposed model can fully capture the coupling effect of typical CLT connections, considering strength degradation, unloading and reloading stiffness degradation, and pinching effect. The model provided a useful tool for nailbased timber connections and a mechanism-based explanation to understand the hysteretic behaviour of CLT connections under bi-axial loading.
Online Access
Free
Resource Link
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Ductility of Dowelled New Zealand Douglas-Fir CLT Connections Under Monotonic and Cyclic Loading

https://research.thinkwood.com/en/permalink/catalogue2114
Year of Publication
2019
Topic
Connections
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Author
Ottenhaus, Lisa-Mareike
Li, Minghao
Brown, J.
Ravn, C.
Scott, B.
Organization
University of Canterbury
Year of Publication
2019
Country of Publication
New Zealand
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Topic
Connections
Keywords
Multi-Story
Douglas-Fir
Dowel-Type Connections
Dowels
Language
English
Conference
Pacific Conference on Earthquake Engineering
Research Status
Complete
Online Access
Free
Resource Link
Less detail

Non-Uniformly Distributed Compression Perpendicular to the Grain in Steel-CLT Connections: Experimental and Numerical Analysis of Bearing Capacity and Displacement Behaviour

https://research.thinkwood.com/en/permalink/catalogue2363
Year of Publication
2019
Topic
Connections
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
General Application
Author
Ncube, Noah
Sabaa, Stephen
Publisher
Linnaeus University
Year of Publication
2019
Country of Publication
Sweden
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
General Application
Topic
Connections
Keywords
Compression
Perpendicular to the Grain
Non-Uniformly Distributed
Finite Element
Load Configuration Factor
Steel Connections
Load
Language
English
Research Status
Complete
Summary
Previous studies have mainly focused on the behaviour of timber under uniformly distributed compression perpendicular to the grain (CPG) loads. However, there are many practical applications in which timber is loaded by non-uniformly distributed CPG loads. Different design and test codes like the Eurocode 5 (EC5), DIN 1052:2004, ASTM D143- 94 and EN-408:2010 only account for load configurations where timber is subjected to uniformly distributed loads. For specific uniformly distributed load (UDL) configurations the bearing capacity of timber (solid softwood timber or Glulam) in compression is adapted by using a load configuration factor (kc,90) according to EC5, the European code for design of timber structures. EC5 has no guidelines for cross-laminated timber (CLT) under UDL with the exception of the Austrian National Regulations for EC5. In this work, an experimental and numerical study on the bearing capacity and displacement behaviour of CLT subjected to non-uniformly distributed loading (NuDL) is conducted on eight different load configurations. A steel-CLT connection in which the CLT is partially loaded is used in this study. Finite element modelling, performed using the commercial software Abaqus CAE is used as the numerical simulation of the experimental study and is validated by experimental results. Load configuration factors (kc,90) from experimental results are compared with values from the Swedish CLT handbook (KL-Trähandbok). The outcome of the study shows that load configuration factor for NuDL cases is higher than for UDL cases. Hence, for same load configurations a lower CPG strength is required in NuDL than in UDL. Moreover, numerical results feature overall good congruence with the elastic phase of the experiments and have the potential to augment experiments in further understanding other complex steel-CLT connections
Online Access
Free
Resource Link
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Simple Cross-Laminated Timber Shear Connections with Spatially Arranged Screws

https://research.thinkwood.com/en/permalink/catalogue1716
Year of Publication
2018
Topic
Connections
Mechanical Properties
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
General Application

Behavior of Cross-Laminated Timber Diaphragm Connections with Self-Tapping Screws

https://research.thinkwood.com/en/permalink/catalogue1288
Year of Publication
2018
Topic
Connections
Mechanical Properties
Seismic
Material
CLT (Cross-Laminated Timber)
Application
General Application

Assessment of Connections in Cross-Laminated Timber Buildings Regarding Structural Robustness

https://research.thinkwood.com/en/permalink/catalogue1948
Year of Publication
2018
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems

Displacement-Based Design of Reinforced Concrete Moment Resisting Frame Incorporating Cross Laminated Timber Infill and Metallic Damper Connector

https://research.thinkwood.com/en/permalink/catalogue1266
Year of Publication
2018
Topic
Seismic
Connections
Material
CLT (Cross-Laminated Timber)
Application
Hybrid Building Systems

Investigating the Hysteretic Behavior of Cross-Laminated Timber Wall Systems due to Connections

https://research.thinkwood.com/en/permalink/catalogue1230
Year of Publication
2018
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Walls
Author
Izzi, Matteo
Polastri, Andrea
Fragiacomo, Massimo
Publisher
American Society of Civil Engineers
Year of Publication
2018
Country of Publication
United States
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Walls
Topic
Connections
Mechanical Properties
Keywords
Numerical Model
Mechanical Behavior
Failure Mechanisms
Anchoring
Joints
Load-Displacement
Energy Dissipation
Language
English
Research Status
Complete
Series
Journal of Structural Engineering
Summary
Cross-laminated timber (CLT) wall systems are composed of massive timber panels that are fastened together and to the horizontal elements (foundations or intermediate floors) with step joints and mechanical connections. Due to the high in-plane stiffness of CLT, the shear response of such systems depends strongly on the connections used...
Online Access
Free
Resource Link
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Long-Term Behavior of Steel-CLT Connections

https://research.thinkwood.com/en/permalink/catalogue2080
Year of Publication
2018
Topic
Connections
Serviceability
Mechanical Properties
Material
Steel-Timber Composite
CLT (Cross-Laminated Timber)
Application
Floors

Overstrength of Dowelled CLT Connections Under Monotonic and Cyclic Loading

https://research.thinkwood.com/en/permalink/catalogue1385
Year of Publication
2018
Topic
Connections
Mechanical Properties
Seismic
Material
CLT (Cross-Laminated Timber)
Application
General Application

Experimental and Numerical Analysis of Flexible Polymer Connections for CLT Buildings

https://research.thinkwood.com/en/permalink/catalogue2057
Year of Publication
2018
Topic
Connections
Mechanical Properties
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems

Mode Cross-Over and Ductility of Dowelled LVL and CLT Connections under Monotonic and Cyclic Loading

https://research.thinkwood.com/en/permalink/catalogue1228
Year of Publication
2018
Topic
Mechanical Properties
Connections
Material
CLT (Cross-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
General Application
Author
Ottenhaus, Lisa-Mareike
Li, Minghao
Smith, Tobias
Quenneville, Pierre
Publisher
American Society of Civil Engineers
Year of Publication
2018
Country of Publication
United States
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
General Application
Topic
Mechanical Properties
Connections
Keywords
Steel Dowels
Steel Plates
Ductility
Brittle
Monotonic Loading
Cyclic Loading
Language
English
Research Status
Complete
Series
Journal of Structural Engineering
Summary
This paper presents an experimental study on dowelled connections in cross-laminated timber (CLT) and laminated veneer lumber (LVL) using 20-mm mild steel dowels and internal steel plates. Connections designed to fail in brittle row shear and group tear-out were tested under monotonic loading...
Online Access
Free
Resource Link
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Bonding Performance of Adhesive Systems for Cross-Laminated Timber Treated with Micronized Copper Azole Type C (MCA-C)

https://research.thinkwood.com/en/permalink/catalogue2200
Year of Publication
2020
Topic
Design and Systems
Connections
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
Lim, Hyungsuk
Tripathi, Sachin
Tang, Juliet
Publisher
ScienceDirect
Year of Publication
2020
Country of Publication
Netherlands
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
Design and Systems
Connections
Keywords
Preservatives
Micronized Copper Azole-Type C
Bonding Performance
Delamination Tests
Block Shear Tests
Adhesives
Block Shear Strength
Wood Failure Percentage
Language
English
Research Status
Complete
Series
Construction and Building Materials
Summary
The feasibility of manufacturing cross-laminated timber (CLT) from southern yellow pine (United States grown) treated with micronized copper azole type C (MCA-C) preservative was evaluated. Lumber (2x6 visually graded no. 2 boards) was treated to two retention levels (1.0 and 2.4 kg/m3 ), planed to a thickness of 35 mm, and assembled along with an untreated control group using three adhesive systems following product specifications: melamine formaldehyde (MF), resorcinol formaldehyde (RF), and one-component polyurethane (PUR). Block shear and delamination tests were conducted to examine the bonding performance in accordance with ASTM D905 and ASTM D2559 Standards, respectively. One-way analysis of variance and Kruskal-Wallis H test were conducted to evaluate the effects of preservative retention and adhesive type on block shear strength (BSS) and wood failure percentage (WFP). Regardless of adhesive type, the 1.0 kg/m3 retention treatment significantly lowered BSS compared to the untreated control. CLT composed of the laminations treated at 2.4 kg/m3 maintained BSS when PUR and RF were used but not MF. The average WFP of each CLT configuration ranged from 89% to 99%. The untreated CLT specimens did not experience any delamination under accelerated weathering cycles. The delamination rates of the treated specimens assembled using MF and RF increased with the preservative retention level, while PUR provided delamination rates less than 1% to the laminations treated at both levels. These combined data suggest that, under the conditions tested, PUR provided overall better bonding performance than MF and RF for MCA-C treated wood.
Online Access
Free
Resource Link
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Extended End Plate Semi-Rigid Composite Joints with CLT Panels and Demountable Shear Connectors

https://research.thinkwood.com/en/permalink/catalogue2059
Year of Publication
2018
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Frames

Cyclic Performance of Connections used in Hybrid Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue1367
Year of Publication
2017
Topic
Connections
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
General Application

Behavior of Cross-Laminated Timber Diaphragm Panel-to-Panel Connections with Self-Tapping Screws

https://research.thinkwood.com/en/permalink/catalogue1422
Year of Publication
2017
Topic
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems

Ductility of Large-scale Dowelled CLT Connections under Monotonic and Cyclic Loading

https://research.thinkwood.com/en/permalink/catalogue2254
Year of Publication
2017
Topic
Connections
Material
CLT (Cross-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
Shear Walls

219 records – page 1 of 11.