Brace Effectiveness of Cross-frame Layout and Connection Design on Skewed Steel Bridges During Construction

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Issue Date
2019-08-31Author
Zhou, Chenqi
Publisher
University of Kansas
Format
455 pages
Type
Dissertation
Degree Level
Ph.D.
Discipline
Civil, Environmental & Architectural Engineering
Rights
Copyright held by the author.
Metadata
Show full item recordAbstract
The Kansas Department of Transportation (KDOT)'s current design practice is to align cross-frames parallel to the skew angle to avoid problems associated with fit-up during erection. The American Association of State Highway and Transportation Officials (AASHTO) provisions for bridges with skew angle greater than 20 degrees are based on the assumption that cross-frames are oriented perpendicular to the girder line. There is a potentially significant discrepancy between assumptions implicit in the AASHTO Specifications and bridges that are designed with cross-frames placed parallel to the skew for skew angles between 20 and 40 degrees. An analytical approach was chosen to study the effects of cross-frame orientation, spacing, skew angle, and connection design upon flange stresses, bridge stability, and cross-frame stresses.
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- Engineering Dissertations and Theses [1055]
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