A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Use of Lean-On Cross-Frame Bracing in Steel Girder Bridges
Four steel bridges in Texas have been designed and will be constructed using lean-on bracing systems where individual cross-frames provide bracing to multiple girders. The detailing used in these bridges includes top and bottom lateral struts in girder bays adjacent to a cross-frame to allow several girders to lean on the cross-frame. Utilization of lean-on concepts should reduce fabrication costs since there will be fewer bracing members that need to be constructed, and also provide maintenance benefits over the life of the bridges since there will be fewer cross-frames to inspect. However, the most significant benefit from use of lean-on cross-frame concepts in bridges with skewed supports is that the bracing system can be laid out such that the cross-frames will pick up smaller forces under truck traffic in the completed bridge, than those that would occur with a conventional cross-frame layout. The bridge systems in which the lean-on bracing system is being implemented in Texas include three severely skewed bridges and one bridge with normal supports. This paper provides details of the specific system implemented in one of the skewed bridges.
Use of Lean-On Cross-Frame Bracing in Steel Girder Bridges
Four steel bridges in Texas have been designed and will be constructed using lean-on bracing systems where individual cross-frames provide bracing to multiple girders. The detailing used in these bridges includes top and bottom lateral struts in girder bays adjacent to a cross-frame to allow several girders to lean on the cross-frame. Utilization of lean-on concepts should reduce fabrication costs since there will be fewer bracing members that need to be constructed, and also provide maintenance benefits over the life of the bridges since there will be fewer cross-frames to inspect. However, the most significant benefit from use of lean-on cross-frame concepts in bridges with skewed supports is that the bracing system can be laid out such that the cross-frames will pick up smaller forces under truck traffic in the completed bridge, than those that would occur with a conventional cross-frame layout. The bridge systems in which the lean-on bracing system is being implemented in Texas include three severely skewed bridges and one bridge with normal supports. This paper provides details of the specific system implemented in one of the skewed bridges.
Use of Lean-On Cross-Frame Bracing in Steel Girder Bridges
Herman, Reagan S. (author) / Helwig, Todd A. (author) / Zhou, Chong (author)
Structures Congress 2007 ; 2007 ; Long Beach, California, United States
2007-10-10
Conference paper
Electronic Resource
English
Use of Lean-On Cross-Frame Bracing in Steel Girder Bridges
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