Time-Dependent Analysis of Long-Span, Concrete-Filled Steel Tubular Arch Bridges
Publication: Journal of Bridge Engineering
Volume 19, Issue 4
Abstract
Concrete-filled steel tubular (CFST) arch bridges have gained popularity over the last decades for use in long-span applications. At service conditions, these bridges are influenced significantly by the time-dependent behavior of the concrete. This paper presents a finite-element model that was developed using commercial finite-element software and is capable of describing the time-dependent behavior. The proposed approach can account for the construction process, time effects, and geometric nonlinearity. The time-dependent behavior of the core concrete in the arch ribs was modeled using European guidelines and the integral-type creep law, implemented with the finite-element model with a user-defined subroutine. The accuracy of the proposed method was validated against real site measurements recorded for a representative arch bridge. As part of this work, the necessity of considering the variation of the time of first loading and the geometric nonlinearity has been discussed. Finally, a simplified method was developed based on the results of the refined finite-element model and is recommended for possible use in day-to-day routine design.
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Acknowledgments
The research reported in the paper was supported by the National Natural Science Foundation of China (No. 51208147), the General Financial Grant from the China Postdoctoral Science Foundation (No. 2013M531048), the National Science and Technology Pillar Program during the twelfth Five-year Plan Period (2011BAJ09B02-03), and the contribution of the third author by the Australian Research Council’s Discovery Projects funding scheme (project no. DP110103028).
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Information & Authors
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Published In
Journal of Bridge Engineering
Volume 19 • Issue 4 • April 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: May 2, 2013
Accepted: Aug 22, 2013
Published online: Aug 27, 2013
Published in print: Apr 1, 2014
Discussion open until: May 17, 2014
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