Beam-Truss Model of Steel-Concrete Composite Box-Girder Bridges
Publication: Journal of Bridge Engineering
Volume 19, Issue 7
Abstract
In this paper, a beam-truss model is introduced for the design analysis of composite box-girder bridges. An integrated research program for beam-truss models, including modeling implementation, analysis, and application, has been performed to exploit this powerful research and design tool. First, beam-truss models of composite box-girder bridges are implemented, and then corresponding model strategies are formulated based on classical shear–flexible grillage analysis. The calculation accuracy of the beam-truss models is then verified through comparative studies on the structural behavior of straight and curved composite, simply supported, and continuous box-girder bridges obtained using elaborate beam-truss finite-element (FE) models. Numerical analyses include modal analysis; static analysis under gravity load, prestressing load, and lane live load; and whole-process analysis considering the construction method and the long-term behavior of concrete. Finally, beam-truss models are employed for the analysis of field tests on two actual composite box-girder bridges, one straight and the other curved. It is concluded that the beam-truss model provides a reliable and powerful tool for the design analysis of composite box-girder bridges.
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Acknowledgments
The authors gratefully acknowledge the financial support provided by the National Science and Technology Support Program of China (2011BAJ09B02) and the National Science Fund of China (51138007).
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Published In
Journal of Bridge Engineering
Volume 19 • Issue 7 • July 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jun 8, 2013
Accepted: Dec 18, 2013
Published online: Jan 29, 2014
Discussion open until: Jun 29, 2014
Published in print: Jul 1, 2014
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