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Fire Performance of Metal-Free Timber Connections

https://research.thinkwood.com/en/permalink/catalogue2186
Year of Publication
2015
Topic
Fire
Connections
Material
LVL (Laminated Veneer Lumber)
CLT (Cross-Laminated Timber)
Other Materials
Application
Wood Building Systems
Beams
Columns
Trusses

Fire Performance of Metal-Free Timber Connections

https://research.thinkwood.com/en/permalink/catalogue82
Year of Publication
2015
Topic
Connections
Fire
Material
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems
Author
Brandon, Daniel
Maluk, Cristian
Ansell, Martin
Harris, Richard
Walker, Pete
Bisby, Luke
Bregulla, Julie
Publisher
ICE Publishing
Year of Publication
2015
Format
Journal Article
Material
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems
Topic
Connections
Fire
Keywords
Glass Fiber Reinforced Polymer
Thermal Behaviour
Mechanical Behaviour
Research Status
Complete
Series
Proceedings of the Institution of Civil Engineers - Construction Materials
Summary
The fire performance of heavy timber frame structures is often limited by the poor fire performance of its connections. Conventional timber connections, dowelled or toothed plate connections typically use steel as a connector material. In a fire, the steel parts rapidly conduct heat into the timber, leading to reduced fire performance. Replacing metallic connectors with alternative non-metallic, low thermal conductivity connector materials can, therefore, lead to improved connection performance in fire. This paper presents an experimental study into the fire performance of metal-free timber connections comprising a hot-pressed plywood flitch plate and glass-fibre-reinforced polymer dowels. The thermal behaviour of the connections at elevated temperatures is studied using a standard cone calorimeter apparatus and a novel heat transfer rate inducing system. The latter is a fire testing system developed at the University of Edinburgh. The mechanical behaviour of the connection during severe heating was also studied using an environmental chamber at temperatures up to 610°C. The results demonstrate that heat transfer in the non-metallic connections is governed by the thermal properties of the timber, resulting in significant enhancements in connection fire performance.
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A New Concrete-Glulam Prefabricated Composite Wall System: Thermal Behavior, Life Cycle Assessment and Structural Response

https://research.thinkwood.com/en/permalink/catalogue1296
Year of Publication
2018
Topic
Mechanical Properties
Environmental Impact
Material
Glulam (Glue-Laminated Timber)
Application
Walls
Author
Boscato, Giosuè
Dalla Mora, Tiziano
Peron, Fabio
Russo, Salvatore
Romagnoni, Piercarlo
Publisher
ScienceDirect
Year of Publication
2018
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Application
Walls
Topic
Mechanical Properties
Environmental Impact
Keywords
Strength
Stiffness
Concrete Glulam Framed Panel
Thermal Behaviour
Carbon Footprint
Embodied Energy
Life-Cycle Assessment
Research Status
Complete
Series
Journal of Building Engineering
Summary
In a former paper by the authors [1], the elastic behavior of Cross Laminated Timber (CLT) and timber panels having periodic gaps between lateral lamellae has been analyzed. A thick plate homogenization scheme based on Finite Elements computations has been applied. The predicted behavior was in agreement with experimental results. In this paper, simplified closed-form solutions are derived in order to avoid FE modeling. Both cases of narrow gaps of CLT panels and wide gaps of innovative lightweight panels are investigated. CLT and timber panels with gaps are modeled as a space frame of beams connected with wooden blocks. The contribution of both beams and blocks to the panel’s mechanical response is taken into account, leading to closed-form expressions for predicting the panel’s stiffnesses and maximum longitudinal and rolling shear stresses. The derived closed-form solutions are in agreement with the reference FE results and they can be used for practical design purposes.
Online Access
Free
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Structural and Thermal Behaviour of a Timber-Concrete Prefabricated Composite Wall System

https://research.thinkwood.com/en/permalink/catalogue247
Year of Publication
2015
Topic
Design and Systems
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Walls
Author
Destro, Riccardo
Boscato, Giosuè
Mazzali, Ugo
Russo, Salvatore
Peron, Fabio
Romagnoni, Piercarlo
Publisher
ScienceDirect
Year of Publication
2015
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Walls
Topic
Design and Systems
Mechanical Properties
Keywords
Structural Behaviour
Thermal Behaviour
Prefabrication
Quasi-Static
In-Plane Tests
Research Status
Complete
Series
Energy Procedia
Summary
This paper presents the analysis of the structural and thermal behaviour of an timber-concrete prefabricated composite wall system, the Concrete Glulam Framed Panel (CGFP) which is a panel made of a concrete slab and a structural glulam frame. The research analyses the structural performance with quasi-static in-plane tests, focused on the in-plane strength and stiffness of individual panels, and the thermal behaviour of the system with steady state tests using an hot box apparatus. The results validate the efficacy of proposed system ensuring the resistance and the dissipative structural behaviour through the hierarchy response characterized by the wood frame, the braced reinforced concrete panel of the singular module and by the rocking effects of global system.
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Three-Dimensional Numerical Calculation Model for Static Behavior Simulation of Cross-Laminated Timber Plates under Thermal Environment

https://research.thinkwood.com/en/permalink/catalogue2766
Year of Publication
2021
Topic
Fire
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Hu, Wenliang
Hou, Wei
Zhu, Zhao
Huang, Xuhui
Publisher
Hindawi Publishing Corporation
Year of Publication
2021
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Fire
Mechanical Properties
Keywords
Finite Element Method (FEM)
Thermal Behaviour
Thermal Environment
Deformation
Load Bearing Capacity
Research Status
Complete
Series
Mathematical Problems in Engineering
Summary
Cross-laminated timber (CLT) is well known as an interesting technical and economical product for modern wood structures. The use of CLT for modern construction industry has become increasingly popular in particular for residential timber buildings. Analyzing the CLT behavior in high thermal environment has attracted scholars’ attention. Thermal environment greatly influences the CLT properties and load bearing capacity of CLT, and the investigation can form the basis for predicting the structural response of such CLT-based structures. In the present work, the finite element method (FEM) is employed to analyze the thermal influence on the deformation of CLT. Furthermore, several factors were taken into consideration, including board layer number, hole conformation, and hole position, respectively. In order to determine the influence, several numerical models for different calculation were established. The calculation process was validated by comparing with published data. The performance is quantified by demonstrating the temperature distribution and structural deformation.
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Free
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