Concrete confinement with steel-reinforced grout jackets

Thermou, Georgia E.; Katakalos, Konstantinos; Manos, George

Abstract

The potential of steel fiber reinforced jackets combined with inorganic matrix (cementitious grout matrix) as an alternative strengthening system to fiber-reinforced polymer (FRP) jackets was investigated experimentally in the current study. For this purpose, the novel jacketing device was applied on cylindrical specimens subjected to monotonic concentric uniaxial compression load. Parameters of investigation were the type of the steel fiber reinforced fabric, its density, the overlap length, and the concrete compressive strength. The 3X2 and 12X types of steel fabric were used with three alternative densities, characterized as high, medium and low density. Experimental evidence has shown that a single layer of SRG jacket has increased substantially both axial strength and deformation capacity. From the response of the SRG confined cylinders the degree of penetration of the grout matrix through the fabric as well as the overlap length are considered rather critical parameters for the effectiveness of the method. The experimental data were used for the derivation of a simple empirical confinement model which correlated well with other well-established FRP confinement models. The knowledge gained from this experimental study renders SRG jacketing a remarkably promising retrofit solution for reinforced concrete confinement.

Citation

Thermou, G. E., Katakalos, K., & Manos, G. (2015). Concrete confinement with steel-reinforced grout jackets. Materials and Structures, 48(5), 1355-1376. https://doi.org/10.1617/s11527-013-0239-6

• Journal Article Type: Article
• Acceptance Date: Dec 11, 2013
• Online Publication Date: Jan 5, 2014
• Publication Date: 2015-05
• Deposit Date: Dec 3, 2018
• Publicly Available Date: Sep 10, 2019
• Journal: Materials and Structures
• Print ISSN: 1359-5997
• Electronic ISSN: 1871-6873
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 48
• Issue: 5
• Pages: 1355-1376
• DOI: https://doi.org/10.1617/s11527-013-0239-6
• Public URL: https://nottingham-repository.worktribe.com/output/1356799
• Publisher URL: https://link.springer.com/article/10.1617%2Fs11527-013-0239-6
• Additional Information: This is a post-peer-review, pre-copyedit version of an article published in Materials and Structures. The final authenticated version is available online at: http://dx.doi.org/10.1617/s11527-013-0239-6
• Contract Date: Sep 10, 2019