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Steel Plate Girder Alternate I-10/I-17 Interchange

by William M. Dowd, HDR Infrastructure, Omaha, NE, USA,
Philip E. Rossbach, HDR Infrastructure, Omaha, NE, USA,



Document Type: Proceeding Paper

Part of: Bridges and Transmission Line Structures

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: Load distribution | Girder bridges | Steel bridges | Load factors | Live loads | Plate girders | Infrastructure construction | Phoenix | Arizona | United States

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