Utilisation innovatrice de l'aluminium dans les ponts : effets de la variation de la température sur le comportement structural d'un tablier à platelage d'aluminium sur poutres d'acier, à action composite
|Advisor:||Fafard, Mario; Annan, Charles-Darwin|
|Abstract:||This project concerns the use of a new aluminium bridge deck that is being developed at Université Laval. It is a 200 mm deep aluminium bridge deck, which represents an alternative to the reinforced concrete slabs in bridges. This project proposes to connect the aluminium bridge deck to steel girders using galvanized ASTM F3125/F3125M-15a grade A325 bolts of diameter M20 in a slip-critical connection. Full composite action between the deck and the girders is expected in order to develop the full capacity of the composite section. However, the coefficient of thermal expansion of aluminium, being twice that of steel, differential movements may occur during temperature changes. To understand the behavior of the bolted connection under such thermal loadings, this project uses finite element model with the Abaqus software. The combinations of dead, live and thermal loads at the ultimate limit state (ULS) and serviceability limit state (SLS) are studied. The loads are calculated according to the Canadian Highway Bridge Design Code (CAN/CSA S6-14). Results confirm that full composite action between the aluminium deck and the steel girders can be achieved. Moreover, by following the recommendations of this study, it is possible to eliminate the sliding that may occur during the thermal loading of the beam at the serviceability limit state (SLS). This study also offers a solution to prevent the failure of the bolted connections following the combination of thermal and mechanical loads.|
|Document Type:||Mémoire de maîtrise|
|Open Access Date:||3 July 2018|
|Collection:||Thèses et mémoires|
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