Creep-Effect on Mechanical Behavior of Concrete Confined by FRP under Axial Compression
Publication: Journal of Engineering Mechanics
Volume 135, Issue 11
Abstract
Despite many successes in concrete creep studies, its effect on the mechanical behavior of concrete members is far from a thorough case-specific understanding. For the members that have been subjected to a long-term load, the classical stress-strain models describing the short-term behavior of either confined or unconfined concrete are unsuitable. In order to investigate this creep-effect, an experiment on eight concrete cylindrical columns confined by fiber-reinforced polymer (FRP) is carried out. Based on the theory of plasticity for concrete, a constitutive model that takes into account the effect of creep on mechanical behavior of concrete confined by FRP is presented. In the model, the creep law inspired in the microprestress-solidification theory is generalized to triaxial stress condition for the calculation of the creep of the concrete columns confined by FRP. The predictions of the model agree well with the experimental results. The present study indicates that the creep increases the elastic modulus, slightly decreases the compressive strength, and degrades the deformation capability of the concrete confined by FRP.
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Acknowledgments
The writers would like to acknowledge the financial support of New-Century Training Program Foundation for the Talents by the State Education Commission of China with Grant No. UNSPECIFIEDNCET-04-0097. For the provision of FRP materials, Shenzhen Ocean Power Engineering Technology Co. Ltd. is also gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 135 • Issue 11 • November 2009
Pages: 1315 - 1322
Copyright
© 2009 ASCE.
History
Received: Nov 16, 2007
Accepted: Jun 19, 2009
Published online: Oct 15, 2009
Published in print: Nov 2009
Notes
Note. Associate Editor: Dinesh R. Katti
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