Research Article
Oct 1965
Ultimate Strength Design for Highway Bridges
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VIEW THE REPLYAuthors: Howard L. Payne, M.ASCE, and Lamar H. CaldwellAuthor Affiliations
Publication: Journal of the Structural Division
Volume 91, Issue 5
Abstract
An ultimate strength design method for highway bridges is presented. Highway bridges have variable live load capacity, and the smaller bridges control highway system capacity. It is demonstrated that the present minimum capacity is 2.0 live loads. A lower bound loading of 1.5 dead loads plus 2.0 live loads is advocated for all common bridges. This loading is applied to concrete decks, reinforced concrete girders, prestressed girders, composite steel girders, trusses, and substructures. These have intermediate grade reinforcing steel and A36 structural steel. Concrete girder bridges can be completely designed using existing specifications. Development work remains to be done on steel girder bridges and trusses. The proposed design method offers consistent service ratings and material economics in all common bridge types. The savings are estimated to be 4% of the national bridge budget.
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Published In
Journal of the Structural Division
Volume 91 • Issue 5 • October 1965
Pages: 43 - 56
Copyright
© 1965 American Society of Civil Engineers.
History
Published in print: Oct 1965
Published online: Feb 1, 2021
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Authors
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Howard L. Payne, M.ASCE
Senior Bridge Engr., California Div. of Highways, Sacramento, Calif.
Lamar H. Caldwell
Assoc. Bridge Engr., California Div. of Highways, Sacramento, Calif.
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