Analysis of Elastic, Doubly Symmetric, Horizontally Curved Beams during Lifting
Publication: Journal of Structural Engineering
Volume 139, Issue 1
Abstract
The lifting of horizontally curved beams (or almost-straight beams with an imperfection in shape) is considered, with application in the construction of bridges. A circularly curved beam that is suspended at two symmetric locations by vertical or inclined cables is analyzed. The cross section of the beam is assumed to be doubly symmetric, the material is assumed to be linearly elastic, the cross-sectional dimensions are assumed to be small relative to the radius of curvature, and the deformations are assumed to be small. Both uniform (St. Venant) torsion and inclusion of nonuniform (warping) torsion are treated. Analytical equations are derived for the overall roll angle of the beam, the internal forces and moments, the weak-axis and strong-axis deflections, and the cross-sectional angle of twist. The behavior depends crucially on the locations of the lift points.
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Acknowledgments
We are grateful to Razvan Cojocaru for his assistance in the preparation of this manuscript, and to the reviewers for their helpful comments.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 1 • January 2013
Pages: 39 - 46
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Feb 25, 2011
Accepted: Mar 29, 2012
Published online: Apr 3, 2012
Published in print: Jan 1, 2013
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