Steel Plate Girder Alternate I-10/I-17 Interchangeby William M. Dowd, HDR Infrastructure, Omaha, NE, USA,
Philip E. Rossbach, HDR Infrastructure, Omaha, NE, USA,
Abstract: The scope of the Phoenix I-10 Viaduct allowed extensive study for the optimization of this moderate span steel plate girder bridge. The value engineering studies lead to the use of the following state-of-the-art features: wide girder spacing (14 ft. centers); long span prestressed concrete deck panels; and integral steel pier cap members with redundant load path. Finite element analysis was used to determine the live load distribution factors, which differed significantly from values recommended by the AASHTO Specifications. The use of the project specific live load distribution factors required the detailed design of diaphragm members and a qualitative review of potential fatigue effects.
Subject Headings: Plate girders | Steel plates | Load distribution | Girder bridges | Steel bridges | Load factors | Live loads | Infrastructure construction | Interchanges | Bridge design | Arizona | North America | Phoenix | United States
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