Bending Strength of a Horizontally Curved Composite I-Girder Bridge
Publication: Journal of Bridge Engineering
Volume 18, Issue 5
Abstract
Horizontally curved I-girders are subjected to combined vertical bending and torsion under gravity loads alone. The torsional behavior of open I-shaped girders is commonly and conveniently transformed to self-equilibrating lateral bending of flanges. The interaction of vertical bending and lateral flange bending reduces the vertical moment–carrying capacity of the section. The interaction equations for predicting the nominal bending strength of horizontally curved I-girders of compact-flange sections subjected to vertical moment and torsion have been derived. Singly symmetric composite and noncomposite I-shaped cross sections in the positive and negative moment zones, respectively, are considered. These strength criteria are based purely on the static equilibrium of the cross section with no secondary amplification considered. The limitations and applicability of the derived equations toward the design use are demonstrated and analyzed.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 18 • Issue 5 • May 2013
Pages: 388 - 399
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 25, 2011
Accepted: Jan 24, 2012
Published online: Jan 26, 2012
Published in print: May 1, 2013
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