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RC column strengthening by lateral pre-tensioning of FRP

Mortazavi, A., Pilakoutas, K. and Son, K.S. (2003) RC column strengthening by lateral pre-tensioning of FRP. Construction and Building Materials, 17 (6-7). pp. 491-497. ISSN 0950-0618

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Abstract

This paper presents a unique strengthening technique for existing concrete columns that use expansive materials to apply lateral pre-tensioning. The technique increases the capacity and ductility of a column as well as achieving better utilisation of the confining FRP (Fibre Reinforced Polymer) material. The confinement material properties and the confined cylinder performance are investigated experimentally. From the results, it is shown that it is possible to control the degree of applied pre-tension by controlling the amount of expansive material used. In addition, it is confirmed that jacketing columns by pre-tensioned FRP materials can increase the load bearing capacity up to 35% compared with no pre-tensioning and up to more than four times compared with unconfined concrete. The paper presents details of experimental work undertaken for the development of the confinement pressure with different confining materials (Carbon-CFRP, Glass-GFRP and Steel) and makes comparisons with predictive models.

Item Type: Article
Copyright, Publisher and Additional Information: © 2003 Elsevier. This is an author produced version of a paper subsequently published in Construction and Building Materials. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Lateral pre-tensioning; Expansive agent; Carbon fibre reinforced polymer (CFRP); Glass fibre reinforced polymer (GFRP); Ductility; Expansive grout; Confinement stiffness
Institution: The University of Sheffield
Academic Units: The University of Sheffield > University of Sheffield Research Centres and Institutes > Centre for Cement and Concrete (Sheffield)
The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield)
Depositing User: Prof Kypros Pilakoutas
Date Deposited: 31 Jan 2011 11:00
Last Modified: 08 Feb 2013 17:30
Published Version: http://dx.doi.org/10.1016/S0950-0618(03)00046-1
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/S0950-0618(03)00046-1
URI: http://eprints.whiterose.ac.uk/id/eprint/42821

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