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Développement d’un outil de calcul non linéaire de dimensionnement d’assemblages bois tridimensionnels soumis à des torseurs plans

Abstract : The aim of this PhD is to propose a numerical modelling engineering tool for the design of dowelled timber joints with in-plane loading (N, M, V). It is part of a context where the needs of the engineers for the design of these kind of joints are increasing, in particular on the connection stiffness estimation and the load distribution. A three-dimensional model of an elastoplastic beam on non-linear supports was chosen as the basis for development in order to model the local mechanical behaviour of the dowel-wood interaction. These nonlinear supports are used to describe the embedment behaviour of the dowel in the thickness of the timber members. Embedding tests on several materials and dowel diameters were carried out to characterize this behaviour. Methodology to analyse embedment test curves was proposed to be in line with the model used. Within the framework of a European collaborative work, this methodology was used on experimental results from four research laboratories in order to provide a database. The database analysis has made it possible to find some empirical correlations to estimate physical parameters related to the embedment. The proposed modelling is developed using the Cast3M finite element calculation code. It integrates all the material behaviours of the joint components. It gives an accurate estimate of the load distribution of the joint generated by in-plane loading, as well as the axial and rotational stiffnesses. The numerical model has revealed the influence of the dowel slenderness on the connection stiffness estimation.
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https://hal.univ-lorraine.fr/tel-02940185
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Submitted on : Wednesday, September 16, 2020 - 10:24:57 AM
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  • HAL Id : tel-02940185, version 1

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Romain Lemaître. Développement d’un outil de calcul non linéaire de dimensionnement d’assemblages bois tridimensionnels soumis à des torseurs plans. Modélisation et simulation. Université de Lorraine, 2020. Français. ⟨NNT : 2020LORR0046⟩. ⟨tel-02940185⟩

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