Structures Congress 2018
Diaphragms to Girders Connection Effect on the Rotation of Exterior Girders during Construction
Publication: Structures Congress 2018: Bridges, Transportation Structures, and Nonbuilding Structures
ABSTRACT
Rotation of exterior girders during bridge deck construction is an issue that many Departments of Transportation (DOTs) around the U.S. are facing. The transverse bracing systems are commonly used to resist the torsional moments resulted from the deck construction loads. This study focuses on the bracing systems including diaphragms and cross-frames, and it targets the different methods used for connecting the diaphragms to the steel girders. Finite element (FE) models are developed to assess the differences among these connecting methods. The results showed that for bridges with diaphragms, using welded connections generally reduces the rotation. On the other hand, using bolted or welded connections in bridges with cross-frames has minimal effect on the rotation. It can be concluded that the effective height of the connection member is the major factor that affects the rotation of the exterior girder due to construction loads.
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ACKNOWLEDGEMENT
This publication is based on the results of ICT-R27-179, Effectiveness of Exterior Beam Rotation Prevention Systems for Bridge Deck Construction - Phase II. ICT-R27-179 was conducted in cooperation with the Illinois Center for Transportation; the Illinois Department of Transportation, Office of Program Development; and the US Department of Transportation, Federal Highway Administration.
REFERENCES
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Ashiquzzaman, M., Hui, L., Schmeltz, J., Merino, C., Bozkurt, B., Ahmed, I., Lindquist, W., and Hindi, R. (2016b). "Effectiveness of Exterior Beam Rotation Prevention Systems for Bridge Deck Construction." ICT-R27-140, Research Report FHWA-ICT-16-015, July, Illinois Center for Transportation/Illinois Department of Transportation.
Ashiquzzaman, M., Merino, C., Hui, L., Ibrahim, A., Lindquist, W., and Hindi, R. (2017). "Effectiveness of different bracing systems to prevent exterior girder rotation during bridge deck construction." Engineering Structures (142), 272–289.
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Information & Authors
Information
Published In
Structures Congress 2018: Bridges, Transportation Structures, and Nonbuilding Structures
Pages: 154 - 166
Editor: James Gregory Soules, CB&I
ISBN (Online): 978-0-7844-8133-2
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Apr 17, 2018
Published in print: Apr 17, 2018
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