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

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.

Grantor dc:publisher

University of Kansas

Year dc:date.issued

2019

Author dc:creator

• Zhou, Chenqi

Advisor dc:contributor.advisor

• Bennett, Caroline R

• Civil engineering
• brace
• connection design
• construction
• cross-frame
• skewed bridge
• stability design

Statement dc:rights

• Copyright held by the author.

Language dc:language.iso

en

Dc Identifier Other

http://dissertations.umi.com/ku:16671

OAI identifier oai:identifier

oai:kuscholarworks.ku.edu:1808/29709