Nonlinear Seismic Response and Parametric Examination of Horizontally Curved Steel Bridges Using 3D Computational Models
Publication: Journal of Bridge Engineering
Volume 18, Issue 3
Abstract
The seismic behavior of horizontally curved steel bridges is more complex than straight bridges because of their curvature and other parameters. Studies that attempt to develop methods to efficiently predict their seismic response have been somewhat limited to date. A computational modeling approach was examined to assist with understanding the seismic behavior of these bridges. The computational, three-dimensional (3D) bridge models consisting of the concrete deck, steel girders, cross-frames, pier columns and caps, and abutments and footings were created in OpenSees and examined for accuracy via application to a representative, three-span continuous curved steel plate girder bridge in Pennsylvania. Sensitivity studies in the form of tornado analyses were also carried out to investigate the influence of critical curved bridge parameters on the seismic response using a group of representative bridges. Each representative bridge was subjected to an ensemble of synthetic ground motions, and seismic response was examined. Results from the sensitivity study indicated a 17–22% variation in maximum bearing and abutment deformations, column curvature ductility, and cross-frame axial forces parameters for the range of bridge radii and span numbers that were investigated.
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Acknowledgments
The authors acknowledge the Korea Electric Power Infrastructure for funding this work and the Pennsylvania, New York, and Maryland Departments of Transportation for assistance.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 18 • Issue 3 • March 2013
Pages: 220 - 231
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jun 9, 2011
Accepted: Nov 21, 2011
Published online: Nov 23, 2011
Published in print: Mar 1, 2013
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