Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
New Directions for Stability Bracing of Steel Bridge Girders
Lateral torsional buckling of steel bridge girders is typically controlled by providing cross-frames or diaphragms spaced along the length of the bridge. The historic protocol employed by many states for the design of these bracing members has often included recommendations for the maximum spacing limits with typical sizes and details for the braces themselves. This procedure usually results in several cross-frames throughout the bridge. The State of Texas has sponsored a number of research studies focused on improving the understanding of the bracing behavior for steel bridge girders. One of the research studies resulted in recommended bracing details in which an individual cross-frame could be sized to brace several girders. The other study focused on improving the connection details between permanent metal deck forms (PMDF) so that the forms could be relied upon for bracing, thereby reducing the number of intermediate cross-frames required. Design methodologies have been developed for both of these bracing systems. The State of Texas is currently implementing results from both of these investigations in the designs of two bridge projects. This paper will provide an overview of the research investigations and highlight the recommendations. A discussion of the bridges on which the bracing recommendations are being implemented is also provided.
New Directions for Stability Bracing of Steel Bridge Girders
Lateral torsional buckling of steel bridge girders is typically controlled by providing cross-frames or diaphragms spaced along the length of the bridge. The historic protocol employed by many states for the design of these bracing members has often included recommendations for the maximum spacing limits with typical sizes and details for the braces themselves. This procedure usually results in several cross-frames throughout the bridge. The State of Texas has sponsored a number of research studies focused on improving the understanding of the bracing behavior for steel bridge girders. One of the research studies resulted in recommended bracing details in which an individual cross-frame could be sized to brace several girders. The other study focused on improving the connection details between permanent metal deck forms (PMDF) so that the forms could be relied upon for bracing, thereby reducing the number of intermediate cross-frames required. Design methodologies have been developed for both of these bracing systems. The State of Texas is currently implementing results from both of these investigations in the designs of two bridge projects. This paper will provide an overview of the research investigations and highlight the recommendations. A discussion of the bridges on which the bracing recommendations are being implemented is also provided.
New Directions for Stability Bracing of Steel Bridge Girders
Helwig, Todd A. (Autor:in)
Structures Congress 2005 ; 2005 ; New York, New York, United States
Structures Congress 2005 ; 1-9
18.04.2005
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
New Directions for Stability Bracing of Steel Bridge Girders
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