Numerical Investigation of Reinforcement of Timber Elements in Compression Perpendicular to the Grain using Densified Wood Dowels

O’Ceallaigh, C.; Conway, M.W.; Mehra, Sameer; Harte, Annette M.

doi:10.1016/j.conbuildmat.2021.122990

Cited by 17 publications

(4 citation statements)

References 26 publications

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“…Typically, hardwood dowels have been used in the manufacture of DLT products, however, in this study, CW dowels are used. CW is a type of modified wood material that has been shown to have superior structural properties to natural timber and has proved to be an environmentally friendly alternative to metallic fasteners in timber connections [4,[19][20][21][22]. The CW used in this study was produced by a process of thermo-mechanical compression of sitka spruce softwood timber to increase its density, strength, stiffness, hardness and to reduce its porosity [23,24].…”

Section: Timber and Compressed Wood Dowelsmentioning

confidence: 99%

Numerical Examination of the Behaviour of Dowel Laminated Timber Elements Utilising Compressed Wood Dowels

O’Ceallaigh

Harte

McGetrick

2023

World Conference on Timber Engineering (WCTE 2023)

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This study examines the use of finite element software to model the failure behaviour of a dowel laminated timber (DLT) beam which is connected with the use of modified or compressed wood dowels. The numerical model is validated against experimental results and a parametric study is carried out to further examine the influence of dowel diameter and dowel spacing on the load-displacement behaviour of the DLT beams. The numerical model is shown to accurately simulate the ultimate failure load and the stiffness of the DLT beams. The influence of dowel diameter and dowel spacing are presented. The results demonstrate that DLT technology can be used to further improve the environmental performance of timber construction by replacing the use of adhesive which is commonly used when manufacturing laminated engineered wood products.

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Section: Timber and Compressed Wood Dowelsmentioning

confidence: 99%

Numerical Examination of the Behaviour of Dowel Laminated Timber Elements Utilising Compressed Wood Dowels

O’Ceallaigh

Harte

McGetrick

2023

World Conference on Timber Engineering (WCTE 2023)

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“…In this application, the dowel connection is subjected to shear and tension forces [1] [2]. After having been replaced by steel fasteners in recent decades, wood dowels are now back in focus, even outside the rehabilitation of cultural heritage [3] [4]. Wood dowels could be a viable alternative, especially where the use of steel fasteners is critical.…”

Section: Historic and Current Applicationsmentioning

confidence: 99%

Tension Loaded Connections With Wood Dowels

Brieden

Braun

Seim

2023

World Conference on Timber Engineering (WCTE 2023)

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Wood dowels carry tremendous opportunities concerning their application as fasteners and connection elements. Aspects such as sustainability and homogeneous recyclability can be addressed very well by using them to an increasing degree. Although they have been quite common for carpenters for hundreds of years, several characteristics need to be clarified systematically from an engineering point of view. In this context, results and further investigations are presented within this paper. The load-bearing behaviour of beech dowels under tension force is subject to pull-out and shear testing. Both the inclination angle and the penetration length as major parameters are varied. The interrelation between the inclination, failure loading and ductility of wood dowels is not linear. This finding should be considered when designing and dimensioning new segmented cross-sections.

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“…In accordance to [1], wood is a material that has advantages in relation to ease of manufacturing parts, as well as technological developments that have been increasingly explored. Other factors, as suggested by the research of [2,3], are the advantages obtained regarding the consumption of energy and the carbon incorporated in wood and engineered wood when compared with materials such as steel and concrete.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Performance of Doweled Connections Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) in Wood Pinus spp.

Camargo

Christofóro

Barcarolo

et al. 2023

Forests

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In line with technological advancements, the construction industry worldwide has sought more efficient building systems in relation to aspects such as increased productivity, reduced material waste and meeting the growing demand. The objective of this research was to use structural joints composed of composite dowels in laminated wood beams as an alternative to connect pieces of wood. Composite materials are composed of a matrix phase and a reinforcement phase and, in civil engineering, are generally applied as reinforcements in concrete structures. This article presents the structural performance of laminated pine timber with composite dowels made of fiber-reinforced polymeric resin (epoxy resin, hardener and glass fiber) (glass-fiber-reinforced polymer, GFRP) with a diameter of 12.5 mm, which was subjected to tensile force in the direction of the connection. For this, an experimental program was carried out that included characterization of the GFRP dowel, characterization of the woods used to make the connection and a tensile test of the connections with the dowels reinforced with fiberglass through a prototype designed specifically for the test. Subsequently, the results were compared with those observed in the literature. In the comparisons, it was possible to conclude that the joints with FRP pins exhibited better performance in terms of shear strength per section than those such as common nails, helical nails (Ardox) and composite structural pins (half-lap, 90°), which were 3.8 mm, 3.4 mm and 6 mm in diameter, respectively. This indicates that this composite material has potential for application in these types of connections. As an original contribution, it proves the feasibility of using this material in dowel joints for wooden structures.

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Numerical Investigation of Reinforcement of Timber Elements in Compression Perpendicular to the Grain using Densified Wood Dowels

Cited by 17 publications

References 26 publications

Numerical Examination of the Behaviour of Dowel Laminated Timber Elements Utilising Compressed Wood Dowels

Numerical Examination of the Behaviour of Dowel Laminated Timber Elements Utilising Compressed Wood Dowels

Tension Loaded Connections With Wood Dowels

Experimental Analysis of the Performance of Doweled Connections Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) in Wood Pinus spp.

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