Numerical 3D finite element modelling and experimental tests for dowel-type timber joints

Xu, Bohan; Taazount, M.; Bouchaïr, Abdelhamid; Racher, P.

doi:10.1016/j.conbuildmat.2009.04.006

Cited by 99 publications

(39 citation statements)

References 15 publications

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“…In literature, it is possible to find numerous experimental results on traditional timber connections. Various studies are available on bird's mouth connections, typically used for roofs (Branco 2008, Parisi and Piazza 2002, Parisi and Piazza 2015 and on mortice and tenon joints regarding pull-out, bending and shear tests (Descamps et al 2006, as well as on dovetail joints with and without pegs (Sobra et al 2015) and dowel-type joints (Xu et al 2009). Moreover, studies exist on the characterisation of specific traditional joints, e.g.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of traditional timber joints under cyclic loading and their influence on the seismic response of timber frame structures

Poletti

Vasconcelos

Branco

et al. 2016

Construction and Building Materials

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Timber joints represent the governing part of a timber structure, particularly when assessing its seismic response. In order to better assess the seismic capacity of traditional timber frame structures, particularly timber-framed shear walls, pull-out and in-plane cyclic tests were carried out on their joints (half-lap joints). The aim is to better understand the influence of the joints on the walls and their influence on failure mechanisms and capacity. Their seismic characterisation was obtained via the analysis of the hysteretic behaviour and dissipative capacity of both unreinforced and retrofitted joints (using self-tapping screws, steel plates and GFRP sheets). Results show that all strengthening techniques were able to improve the dissipative and loadbearing capacity, but care should be taken into not over-stiffening the joints, as it would lead to an overly rigid structure. Highlights:  Joints govern the behaviour of a timber structures  Joints constitute the dissipative mechanism of timber structures for seismic events  The quality of the joint (presence of gaps) greatly alters the response of a joint  Strengthened joints present significantly higher stiffness and dissipative capacity

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Section: Introductionmentioning

confidence: 99%

Performance evaluation of traditional timber joints under cyclic loading and their influence on the seismic response of timber frame structures

Poletti

Vasconcelos

Branco

et al. 2016

Construction and Building Materials

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“…The ductile and brittle failure in the constitutive modelling of wood is taken in account, introducing plasticising and cracking of wood. In [38], a three-dimensional FE model is developed to predict the mechanical behaviour of steel-to-timber joints loaded in parallel-to-grain tension. The model is based on the isotropic behaviour of the steel and the transverse isotropy behaviour of the timber.…”

Section: Corner Joints Modellingmentioning

confidence: 99%

Wooden window frames with structural sealants: manufacturing improvements and experimental validation of a finite element model

Pantaleo

Ferri²,

Pellerano

2013

Journal of Adhesion Science and Technology

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This paper proposes a finite element (FE) model of a novel wooden window frame typology and validates it by experimental tests on window frames and corner joint specimens. The innovation consists of the application of the structural silicone sealant only at the interface between wood and one of the thin glass layers of the double-glazing glass, so achieving a low application depth. This technique reduces the sealant quantity and allows the disassembly and substitution of the glass from the frame in case of breakage. In order to inform the FE model of the whole frame, the dowelled butt corner joint strength is measured by specific experimental tests. The results show a good correlation between the FE model and the experimental results in the range of small frame deformations, which are of interest for the proposed application. In particular, the FE curve overestimates the bottom corner displacement of about 17% at 1000 N load, 7% at 2000 N and less than 5% at higher applied force on the upper corner. The model is then applied to various wooden frame geometries in order to evaluate if the proposed silicone application mode and dowelled corner joints type allow an acceptable stiffness of the frame, and, in particular, low deformations of the bottom corner joint, in order to maintain the wooden frame functionality when subject to external loads. The approach could be useful when assessing optimal sealing application modes, wood-sealant-glass joint geometries, corner joint geometries and window frame geometries to limit the bottom corner joint deformation within the required technical specifications. IntroductionWood frames are used in several manufacturing applications, such as kitchen, doors, windows, partitions, etc. In particular, novel architecture and structural engineering are characterized by thin frames and large spans where glass represents a structural element and contributes to the energy performance of the buildings. These requirements increase the interest in structural sealants' applications, in novel joining techniques and in the overall assessment of frames structural performances under various applied loads. Moreover, the growing interest on the energy performance of buildings has increased the scientific research in the area of glass and façade in architecture, and in novel chemical and mechanical approaches to the structural sealants and window

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“…Estos modelos en muchos de los casos son combinables con los de comportamiento mecánico elastoplástico tipo Von Mises o Hill (Xu et al, 2009). En realidad, cuando a la madera se la somete a esfuerzo normal de tracción perpendicular a la fibra longitudinal, su comportamiento se aproxima más a uno de tipo elástico-frágil (Williams et al, 2000) que a uno de tipo elastoplástico, siendo además este tipo de esfuerzo uno de los más críticos y peligrosos que pueden aparecer en el material.…”

Section: Modelo De Elementos Finitosunclassified

Rendimiento de Uniones Clavija de Tipo Perno Encolado usando Elementos Finitos

2011

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ResumenSe presenta un estudio sobre las tecnologías de unión en nudos de estructuras de madera, centrándose sobre todo en aquellas de tipo perno encolado. Se buscó comparar el rendimiento de estas uniones con las de tipo clavija sin encolar y se compararon los resultados obtenidos por tres métodos: i) aplicando las ecuaciones analíticas contempladas en las normas oficiales y la literatura; ii) realizando estudios mediante el método de los elementos finitos; iii) y realizando ensayos de laboratorio de estos mismos diseños propuestos. Para realizar el estudio por el método de los elementos finitos, se prepararon varios modelos paramétricos que permitieron englobar todas las variaciones posibles de las variables que afectan a la unión. Los resultados permitieron determinar como la modificación de las variables estudiadas afectan al rendimiento en cada caso. Palabras clave: uniones, estructuras de madera, pernos encolados, elementos finitos Performance of Dowel-Type Joints of the Glued in Rod Type using Finite ElementsA study on wood-steel joints used in timber structures with emphasis on the, glued in rod type, is presented. The performance of these joints with and without adhesive where compared and the results from these studies were analyzed in three different ways; i) using the analytical equations applied in the official standards and in the literature; ii) using the finite element method technique; and iii) making empiric tests of the same proposed designs used in the two previous methodologies. To use the finite element method, different parametric models were prepared, which could include all the possible variations of the variables which affect the joint performance. The results allowed determining how the modification of the variables studied affects the performance in each case.

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Numerical 3D finite element modelling and experimental tests for dowel-type timber joints

Cited by 99 publications

References 15 publications

Performance evaluation of traditional timber joints under cyclic loading and their influence on the seismic response of timber frame structures

Performance evaluation of traditional timber joints under cyclic loading and their influence on the seismic response of timber frame structures

Wooden window frames with structural sealants: manufacturing improvements and experimental validation of a finite element model

Rendimiento de Uniones Clavija de Tipo Perno Encolado usando Elementos Finitos

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