Time-Dependent Response of Spatially Curved Steel-Concrete Composite Members. I: Computational Modeling
Publication: Journal of Structural Engineering
Volume 139, Issue 12
Abstract
This paper develops a numerical formulation for the nonlinear time-dependent analysis of steel-concrete composite members that are curved arbitrarily in space, which includes the effects of concrete shrinkage, creep, and geometric nonlinearity. This formulation is applicable to the analysis of composite arches and composite beams curved in plan, representing the limiting cases of members that are vertically and horizontally curved. The flexibility of the shear connection at the interface surface between the steel girder and the concrete deck is taken into consideration in the formulation. For an accurate serviceability limit state analysis of composite curved members, it is essential to include the shrinkage and creep response of the concrete component in the analysis. To also include the effects of geometric nonlinearity, a step-by-step incremental iterative solution procedure is adopted. Comparisons of the numerical solutions with those based on much less efficient and tractable viscoelastic ABAQUS shell element models, and with available experimental results, verify the accuracy of the computational formulation that is developed. Examples are chosen to illustrate the effects of partial interaction and initial curvature on the time-dependent behavior of spatially curved composite beams.
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Acknowledgments
The work in this paper was supported by the Australian Research Council through a Discovery Project (DP0770739) awarded to the second author, as well as through its Australian Laureate Fellowship scheme.
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Published In
Journal of Structural Engineering
Volume 139 • Issue 12 • December 2013
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Feb 6, 2012
Published online: Aug 13, 2012
Accepted: Feb 8, 2013
Published in print: Dec 1, 2013
Discussion open until: Feb 4, 2014
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