Analytical Model for FRP-and-Steel-Confined Circular Concrete Columns in Compression
Publication: Journal of Composites for Construction
Volume 18, Issue 3
Abstract
Providing additional confinement by external fiber-reinforced polymer (FRP) wrapping is one of the most common and effective techniques for the retrofit of existing reinforced concrete columns. Over the past 2 decades, researchers have made much progress on the development of constitutive models to describe the behavior of FRP-confined circular concrete sections in compression. However, only recently have a few models been published representing the first attempts to develop a constitutive model for circular concrete columns in compression confined by both external FRP wraps and internal transverse steel. A critical review and evaluation of existing FRP-and-steel-confined concrete constitutive models highlights the need for a more robust model. This paper presents the development of a new FRP-and-steel-confined concrete in compression constitutive model for circular sections based on the passive-confinement approach. A new lateral-to-axial strain relationship and failure surface function are developed. Through a comparison with published experimental data, the accuracy of the proposed model is demonstrated.
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Published In
Journal of Composites for Construction
Volume 18 • Issue 3 • June 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jan 23, 2013
Accepted: May 5, 2013
Published online: May 6, 2013
Discussion open until: May 18, 2014
Published in print: Jun 1, 2014
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