Analytical and Numerical Modeling of Prestressed Continuous Steel-Concrete Composite Beams
Publication: Journal of Structural Engineering
Volume 137, Issue 12
Abstract
A loading capacity analysis is conducted for prestressed continuous steel-concrete composite beams. On the basis of the basic theoretical framework of the solution of externally unbonded prestressed structures, formulas for calculating the three characteristic loads (crack, yield, and ultimate loads) of two-span prestressed continuous composite beams under symmetric concentrated loads are proposed and extended to general cases. The variation of tendon force is considered and the adopted limit equilibrium approach only requires the development of equilibrium equations, which avoids the solution of cumbersome simultaneous deformation compatibility equations. Furthermore, an elaborate finite element model is presented for simulating the nonlinear behavior of prestressed continuous composite beams by using the commercial finite element package. The numerical model considering both the material and geometric nonlinearities can fully reflect the complex behaviors of prestressed continuous composite beams during the whole loading process. The comparisons among the analytical, numerical, and experimental results demonstrate that the analytical method provides a convenient and reliable tool for a routine design practice and the finite element model provides an excellent numerical simulation for the nonlinear behavior of prestressed continuous composite beams.
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Acknowledgments
The writers gratefully acknowledge the financial support provided by the National Science Fund of China (NSFC50438020 and NSFC50828803), Changjiang Scholars, and Innovative Research Team in University (UNSPECIFIEDIRT00736).
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Published In
Journal of Structural Engineering
Volume 137 • Issue 12 • December 2011
Pages: 1405 - 1418
Copyright
© 2011 American Society of Civil Engineers.
History
Received: May 15, 2009
Accepted: Mar 24, 2011
Published online: Mar 26, 2011
Published in print: Dec 1, 2011
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