Analysis of Segmentally Constructed Prestressed Concrete Bridges Using Hexahedral Elements with Realistic Tendon Profiles
Publication: Journal of Structural Engineering
Volume 140, Issue 6
Abstract
The paper presents a systematically numerical procedure based on the finite-element method for three-dimensional analysis of segmentally constructed prestressed concrete bridges using hexahedral elements including realistic tendon profiles. The enhanced assumed strain (EAS) is used in the formulation of the hexahedral element in order to improve the element performances. Both the geometric nonlinearity and time-dependent effects due to creep, shrinkage, and aging of the concrete and relaxation of the prestress are taken into account, while variations of the structural configuration due to changes of the structural geometry and boundary conditions during the construction process are also incorporated. To include realistic tendon profiles, the idealized prestressing tendon is represented by a system of piecewise linear prestressing segments. Several numerical examples in a wide range of prestressed concrete structures are presented to demonstrate the validity and efficiency of the proposed procedure. Finally, application to the erection of a segmentally erected prestressed concrete bridge is discussed at the end of the paper.
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Acknowledgments
This work was supported by Konkuk University.
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Published In
Journal of Structural Engineering
Volume 140 • Issue 6 • June 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 12, 2012
Accepted: Aug 6, 2013
Published online: Aug 8, 2013
Published in print: Jun 1, 2014
Discussion open until: Aug 13, 2014
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