Probabilistic Vulnerability Assessment of Horizontally Curved Multiframe RC Box-Girder Highway Bridges
Publication: Journal of Performance of Constructed Facilities
Volume 30, Issue 3
Abstract
Numerous concrete box-girder bridges in California are horizontally curved and also have at least one in-span hinge. The curvature and in-span hinges in multiframe bridges lead to significant differences in bridge dynamic response during seismic excitations. In this article, a set of analytical fragility curves for horizontally curved highway bridges are developed based on nonlinear time history analyses in OpenSEES, focusing on subclasses of seismically designed multiframe concrete box-girder bridges with multicolumn bents and seat type abutments. Component damage levels are explored for joint seals, columns, bearings, abutments, unseating of decks, foundations, and shear keys, and system level damage states consistent with HAZUS-MH definitions. Curvature was identified to be an important factor that adversely affects the fragility of multiframe bridges. Median value modification factors are proposed to scale fragility curves to account for the deck radius effects.
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Published In
Journal of Performance of Constructed Facilities
Volume 30 • Issue 3 • June 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Sep 22, 2014
Accepted: Apr 2, 2015
Published online: Jun 10, 2015
Discussion open until: Nov 10, 2015
Published in print: Jun 1, 2016
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