Improvement of performance of the RC beams using the longitudinal spiral reinforcements
International Journal of Structural Integrity
ISSN: 1757-9864
Article publication date: 4 October 2022
Issue publication date: 16 November 2022
Abstract
Purpose
This study aims to investigate the effects of using circular spirals as the longitudinal reinforcing bars on the performance of the concrete beams subjected to four-point bending load.
Design/methodology/approach
The effects of using circular spirals as the longitudinal reinforcing bars on the performance of the concrete beams subjected to four-point bending load are investigated in this study. Employing circular spirals as the main longitudinal reinforcement is a novel idea presented in this paper. In this regard, a finite element model of the beam with spiral longitudinal reinforcement was developed. After model verification, several configurations of concrete beams reinforced by longitudinal spirals were simulated under the four-point loading condition.
Findings
Obtained results showed that using the longitudinal spirals in place of the conventional longitudinal reinforcing bars can improve the bearing capacity of the concrete beam, but at the same time, increases its ductility unacceptably. In other words, the spirals reduce the initial stiffness of the beam significantly. To solve the problem, the authors decided to use the longitudinal spirals as the auxiliary bars added to the main conventional longitudinal bars in the beams. New gained results were satisfactory. By adding the longitudinal spirals to the conventional bars, not only the bearing capacity of the beam increases between 24% and 63%, but also the initial stiffness and ductility of the beam raises between 11%–29% and 3%–57%, respectively, in comparison to the corresponding beam reinforced with conventional longitudinal bars.
Originality/value
Employing circular spirals as the main longitudinal reinforcement is a novel idea presented in this paper.
Keywords
Citation
Labibzadeh, M., Bostan Shirin, F. and Khajehdezfuly, A. (2022), "Improvement of performance of the RC beams using the longitudinal spiral reinforcements", International Journal of Structural Integrity, Vol. 13 No. 6, pp. 922-950. https://doi.org/10.1108/IJSI-07-2022-0094
Publisher
:Emerald Publishing Limited
Copyright © 2022, Emerald Publishing Limited