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2014-08-15 - Travail avec promoteur/TFE - Anglais - 131 page(s)

Avez Coralie , "Glued-in rods : Experimental investigations, numerical development and study of a corner frame connection", Descamps Thierry (p) , Tannert Thomas, 2013-09-15, 2014-09-01

  • Codes CREF : Programmation et méthodes de simulation (DI4317), Résistance et comportement des matériaux (DI2110), Assemblage (DI2133), Stabilité des constructions [construction de bâtiments] (DI2121)
  • Unités de recherche UMONS : Génie civil et Mécanique des Structures (F801)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
  • Centres UMONS : Urbanisation Revitalisation Bâtiment Architecture Innovations Espaces (URBAINE)

Abstract(s) :

(Anglais) When designing a wood structure, the capacity of a connection is almost always lower than that of the members it’s linking. Moreover, as minimum distances between connectors or edge distances must be respected, connections can be large and space-consuming. Connections are thus often regarded as the weakest part of a timber structure, and also the most expensive. A glued-in rod, or bonded-in rod, is a bar glued into a piece of wood, which is used in new structures or old damaged buildings. This master thesis focuses on the study of threaded steel glued-in rods used in a particular corner frame connection. The objective is to take advantage of the numerous qualities of these connectors (stiffness, strength) to develop an alternative to connections using classic connectors. We first focus on the prediction of the behaviour of a single glued-in rod to develop a finite elements model predicting its strength and stiffness. To be able to make such a model, two kinds of experimental investigations are undertaken. First, obtain all the material properties needed; second, collect all necessary experimental results to calibrate the model and thus make it reliable. We have thus developed a model which correctly predicts the behaviour of any rod, i.e. its strength, stiffness and also the distribution of stresses in the connection. We can then design the moment frame connection, based on our research and on previous works, and evaluate the savings this solution can bring compared to a particular connection made of classic connectors. The comparison shows that glued-in rods are far more efficient and save substantial amounts of materials and money compared to the most common connection used in new structures. They also ensure a ductile failure, which is crucial in structures design. We therefore conclude that glued-in rods connections are a good alternative to classic connectors.

Notes :
  • (Anglais) This Master thesis has been carried out at the University of British Columbia (UBC), Vancouver, Canada, in the Faculty of Forestry.