Université de Liège Réseau des Bibliothèques

BICTEL/e - ULg
Serveur institutionnel des thèses de doctorat



Nouvelles thèses
dans BICTEL/e - ULg
  • Ait Kaki, Asma - Recherche de nouvelles potentialités de bactéries du genre Bacillus pour l’agriculture et l’agroalimentaire
  • Dubois, Charline - Quels agritourismes pour les campagnes périurbaines ? Les cas de la Wallonie et du Grand-Duché de Luxembourg
  • Nibirantiza, Aboubacar - Sur les quantifications équivariantes en supergéométrie de contact
Présentation Recherche thèse Dépôt thèse Accès
gestionnaires
 
Page de résumé pour ULgetd-12122006-120557

Auteur : Ly, Dong Phuong Lam
E-mail de l'auteur : DPLAM.Ly@ulg.ac.be
URN : ULgetd-12122006-120557
Langue : Français/French
Titre : Développement de modèles analytiques pour la prédiction du comportement élastique des assemblages mécaniques à broches dans la construction en bois
Intitulé du diplôme : Doctorat en sciences de l'ingénieur
Département : FSA - Département ArGEnCo
Jury :
Nom : Titre :
François, Nathalie Membre du jury/Committee Member
Haller, Peer Membre du jury/Committee Member
Maquoi, René Membre du jury/Committee Member
Weinand, Yves Membre du jury/Committee Member
Franssen, Jean-Marc Président du jury/Committee Chair
Jaspart, Jean-Pierre Promoteur/Director
Mots-clés :
  • numerical modelling
  • timber joints
  • component method
  • elasto-plastic
  • heterogeneity
  • anisotropy (orthotropy)
  • non linear analysis
  • local analysis
  • contact
  • semi-rigid modelling
  • analytical modelling
Date de soutenance : 2006-09-13
Type d'accès : Public/Internet
Résumé :

A general procedure for the evaluation of the mechanical properties of structural joints, named

“component method”, is now available from intensive research works at the European

level. This procedure allows the analytical prediction of the resistance, but also of the stiffness

and the deformation capacity, of structural joints under external forces (axial or shear

forces, bending moments …).

The component method is nowadays integrated as a reference procedure in two European design

codes, respectively for steel structures (EC3 [EN1993]) and steel-concrete composite

structures (EC4 [EN1994]). However, its potential scope is much larger and present studies

are aimed to apply to situations as joints in fire, joints under seismic loading, joints under

exceptional loads (Robustness Project) ….

More recently, a research project [CTI-2004] has succeeded in applying the component

method to the investigation of the elastic behaviour of mechanical joints in timber construction.

That is the result of the collaboration of CTIB-TCHN (Belgian Institute for Wood

Technology) and University of Liège.

The main principle of the component method is the following:

• identification of constitutive components subjected to tension, compression or shear in

the joint;

• determination of the mechanical behaviour of these individual components;

• "assembling" components so as to derive the mechanical properties of the whole joint.

In the present paper, timber joints with dowel fasteners are considered. Two components

may be identified:

• "dowel" component (dowel fastener in bending and shear);

• embedding component (timber member in embedding).

The "dowel" component is known from past researches, whereas little information is available

for the embedding component. EC5 [EN1995] proposes formulation to predict the behaviour

for joints composed of these two components; but it only depends on two factors: the dowel

diameter and the timber density. The influence probably significant of the grain direction

(material strongly anisotropy) and the thickness of the connected members are for instance

neglected.

Experimental, numerical and analytical investigations have recently been performed by University

of Liège in collaboration with CTIB-TCHN so as to propose another formulation more

precise for joints. Experimental results, performed by CTIB-TCHN, have been used as reference

for the development of numerical model and, then, analytical model. The application of

the component method to the prediction of the elastic behaviour of timber joints consist of

two steps:

• "local" investigation on components that is to develop analytical models for the prediction

of the elastic behaviour of components;

• "global" investigation on joints that is to develop analytical models for the prediction

of the elastic behaviour of joints.

The application of the component method to timber joints with dowel fasteners is a first step

towards the use of this concept in future to others mechanical joints (screw, punched metal

plate, nail, bolt …). In this case, others components may be derived to cover the field of application

expected.

Autre version :
Fichiers :
Nom du fichier Taille Temps de chargement évalué (HH:MI:SS)
Modem 56K ADSL
[Public/Internet] LYLam.pdf 8.12 Mb 00:19:20 00:00:43

Bien que le maximum ait été fait pour que les droits des ayants-droits soient respectés, si un de ceux-ci constatait qu'une oeuvre sur laquelle il a des droits a été utilisée dans BICTEL/e ULg sans son autorisation explicite, il est invité à prendre contact le plus rapidement possible avec la Direction du Réseau des Bibliothèques.


Parcourir BICTEL/e par Auteur|Département | Rechercher dans BICTEL/e


© Réseau des Bibliothèques de l'ULg, Grande traverse, 12 B37 4000 LIEGE