Single-Span Prestressed Girder Bridge: LRFD Design and Comparison
Publication: Journal of Bridge Engineering
Volume 7, Issue 1
Abstract
This report summarizes the comparative design of a single-span AASHTO Type III girder bridge under the AASHTO Standard Specification for Highway Bridges, 16th Edition, and the AASHTO LRFD Bridge Design Specification. The writers address the differences in design philosophy, calculation procedures, and the resulting design. Foundation design and related geotechnical considerations are not considered. The LRFD design was similar in most respects to the Standard Specification design. The significant differences were: (1) increased shear reinforcement; (2) increased reinforcement in the deck overhang; and (3) increased reinforcement in the wing wall. The comparisons would likely change if the bridge were designed purely according to LRFD Specifications rather than as a comparative design. Design procedures under the LRFD Specification tend to be more calculation-intensive. However, the added complexity of the LRFD Specification is counterbalanced by the consistency of the design philosophy and its ability to consider a variety of bridges.
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References
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 7 • Issue 1 • January 2002
Pages: 22 - 30
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Feb 22, 2000
Accepted: Feb 22, 2001
Published online: Jan 1, 2002
Published in print: Jan 2002
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