Evaluation of Fatigue Bond Strength of Anchorage Zones with a Mechanical Model
Publication: Journal of Structural Engineering
Volume 139, Issue 1
Abstract
The paper describes a numerical model to analyze the fatigue behavior of RC anchorage zones. The model takes into account the cycle-dependent bond-slip behavior at the steel-concrete interface and is able to reproduce the experimental increase of the relative slip developed with number of load cycles, as well as the process of redistribution of stresses that takes place over the anchorage length as a result of fatigue damage. The results compare satisfactorily with existing experimental results. The model has been used to derive curves to provide the fatigue strength of anchorage zones under different confinement conditions and various values of the anchorage length-to-diameter ratio and the steel diameter. The results indicate that the confinement degree plays a significant role in the fatigue bond strength: no fatigue problems are found for the well-confined concrete condition, but significantly short fatigue strength is obtained under the moderately confined and unconfined concrete conditions.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 1 • January 2013
Pages: 28 - 38
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jul 11, 2011
Accepted: Mar 2, 2012
Published online: Mar 6, 2012
Published in print: Jan 1, 2013
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