Determination of shearing stiffness parameters to design multi-layer spruce beams using welding-through wood dowels

Girardon, Stéphane; Barthram, Charles; Resch, L.; Bocquet, J.F.; Triboulot, P.

doi:10.1007/s00107-014-0834-4

Cited by 9 publications

(9 citation statements)

References 13 publications

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“…Fasteners must be added to hold grooved interfaces like screws or welded-through wood dowels in contact (Bocquet et al 2007;Girardon et al 2014). This paper presented a first step for grooved connections.…”

Section: Resultsmentioning

confidence: 99%

Mechanical behaviour of pre-stressed spruce timber–timber 2.5-mm-step grooved connections under shearing tests

Girardon

Bocquet²

2016

Eur. J. Wood Prod.

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A smart shear connection system was tested in order to be used in manufactured elements of a lattice of wooden slats and a cross offset. This type of floor element can present advantages both in terms of weight and suitable insulating filler (Adalberth et al. 2001; Kawasaki and Kawai 2006; Kermani and Hairstans 2006; Dodoo et al. 2014). This connection is made to provide a substitute for a glue connection. The shear connection proposed is made by double-sided grooving timber interfaces to form a cross section. A specifically designed test assembly was constructed to measure and guarantee homogeneous contact pressure in interface test specimens. Shear test results are presented and compared in terms of capacity and stiffness with glue connections. The principal conclusions are as follows: the allowable shearing resistance of the grooved timber-timber joints can approximately reach the resistance of glued connections. The stiffness of the joints is improved by increasing the pre-stress applied for holding contact in the assembly. The grooved timber-to-timber joints exhibit non-linear behaviour which dominates the behaviour of the whole system. Therefore, the behaviour of a unit connection must be determined to obtain the mean load-carrying capacity and stiffness of a system with grooved connections.

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Section: Resultsmentioning

confidence: 99%

Mechanical behaviour of pre-stressed spruce timber–timber 2.5-mm-step grooved connections under shearing tests

Girardon

Bocquet²

2016

Eur. J. Wood Prod.

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“…In his thesis, Pirazzi [39] compiled and compared different analytical and numerical approaches, but mainly for steel fastener connections. Concerning wood-wood connections, the mechanical behavior of welding-through wood dowels, which is a specific assembly type used in multi-layer spruce beams, was investigated with 2D FE models [40][41][42], as well as a complex 3D FE model [43], with the FE code Cast3M R (CEA, Paris-Saclay, France). The development of these 2D FE models was expanded for grooving timber interfaces by Girardon et al [44,45].…”

Section: Numerical Modelsmentioning

confidence: 99%

A Calculation Method for Interconnected Timber Elements Using Wood-Wood Connections

2020

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Wood-wood connections, widely used in the past, have been progressively replaced by steel fasteners in timber constructions. Currently, they can be manufactured and implemented more efficiently thanks to digital fabrication techniques. In addition, with the emergence of new timber plate engineered products, digitally produced wood-wood connections have been developed with a strong focus on complex free-form geometries. The gained knowledge through research and building implementations have pushed the development of more standardized structural elements. As a result, this work presents a new concept of building components using through tenon connections based on the idea of transportable flat-packs directly delivered and assembled on site. The main objective of this research is to develop a convenient calculation model for practice that can capture the semi-rigid behavior of the connections and predict the effective bending stiffness of such structural elements. A case study is used as a reference with three large-scale slabs of a 8.1 m span. Bending and vibration tests are performed to study the mechanical behavior and assess the proposed calculation method. The results show the high influence of the semi-rigid behavior of connections on the bending properties and, therefore, on the serviceability limit state. The model is in good agreement with the test results, and further improvements can be made regarding the local behavior of the connection. This study demonstrates the feasibility of the proposed construction system and the applicability of the developed calculation model to design practice.

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“…At the same time, traditional wood dowels are continuously used as a green and low-carbon alternative for connecting CLT [2][3][4]. A new wood dowel friction welding technology has also been attempted [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Study of the Single Shear Performance of a Joint with a New Beech and Self-Tapping Screw Composite Dowel

Zhu¹,

Xue²,

Zhang³

et al. 2022

Journal of Renewable Materials

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A new beech and self-tapping screw composite dowel is proposed and studied, its performance being compared with that of beech dowels and self-tapping screws alone. The single shear performance of components connected by composite dowels was tested. Results show that the dowels are a good choice for components requiring high stiffness. Screws remain a good choice for components requiring excellent seismic performance. Combination group presents similar maximum load stiffness to those of composite dowels, but other ductility parameters are superior for composite dowels. The best connection mode was provided by two composite dowels. Based on connecting two points, structural elements with two composite dowels showed much better load bearing ability than when joined by two beech dowels or by two self-tapping screws separately. The structural element with two composite dowels not only presented better initial stiffness, but also exhibited a better ductility coefficient and less energy consumption. So, the composite dowels can be used for beam column connection, dowel laminated timber, and restoration or enhancement of ancient buildings.

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Determination of shearing stiffness parameters to design multi-layer spruce beams using welding-through wood dowels

Cited by 9 publications

References 13 publications

Mechanical behaviour of pre-stressed spruce timber–timber 2.5-mm-step grooved connections under shearing tests

Mechanical behaviour of pre-stressed spruce timber–timber 2.5-mm-step grooved connections under shearing tests

A Calculation Method for Interconnected Timber Elements Using Wood-Wood Connections

Study of the Single Shear Performance of a Joint with a New Beech and Self-Tapping Screw Composite Dowel

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