Delaying the Occurrence of Bar Buckling in RC Columns Confined with SRG Jacketing

Thermou, Georgia E.; Tastani, Sousana

Abstract

This paper investigates experimentally the structural performance of substandard reinforced concrete (RC) short columns confined with steel-reinforced grout (SRG) jackets under monotonically increasing uniaxial compression. The study comprised 24 square cross section short RC columns having alternative arrangements of shear reinforcement (ratio of stirrup spacing to longitudinal bar diameter ranging from 4.2 to 12.5). The short columns were retrofitted with externally applied SRG jacketing differing by the density of the fabric (4 cords/in and 12 cords/in) and the number of fabric layers (1 and 2). The test results showed that retrofitting significantly changed the behaviour of the specimens compared to the unconfined counterparts. For columns at risk of premature failure due to insufficient support of compression bars provided by the sparse stirrups, the SRG jackets delayed bar buckling, enabling the members to achieve greater strength and deformation capacity. The well-detailed specimens helped establish the maximum effectiveness of SRG confinement.

Citation

Thermou, G. E., & Tastani, S. (2023). Delaying the Occurrence of Bar Buckling in RC Columns Confined with SRG Jacketing. Applied Sciences, 13(12), Article 7232. https://doi.org/10.3390/app13127232

• Journal Article Type: Article
• Acceptance Date: Jun 14, 2023
• Online Publication Date: Jun 16, 2023
• Publication Date: 2023-06
• Deposit Date: Jun 15, 2023
• Publicly Available Date: Jun 20, 2023
• Journal: Applied Sciences
• Electronic ISSN: 2076-3417
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 13
• Issue: 12
• Article Number: 7232
• DOI: https://doi.org/10.3390/app13127232
• Keywords: steel reinforced grouts; confinement; buckling; Seismic strengthening
• Public URL: https://nottingham-repository.worktribe.com/output/21913796
• Publisher URL: https://www.mdpi.com/2076-3417/13/12/7232