Design optimization of two-span continuous composite box girder bridges

Composite steel box girder bridges have become an effective alternative to conventional plate girders and concrete girder bridges in North America in the past 25 years. A number of ongoing innovations in Canada and elsewhere have the potential of further enhancing the design, durability, constructability, and, by extension, the economics of steel box-girder bridges. The thesis examines number of boxes actually needed, with the aim of reducing the number used at present while meeting all design criteria.