relation: https://khub.utp.edu.my/scholars/14584/
title: Article investigating optimal confinement behaviour of low-strength concrete through quantitative and analytical approaches
creator: Ali, M.
creator: Abbas, S.
creator: Salah, B.
creator: Akhter, J.
creator: Saleem, W.
creator: Haruna, S.
creator: Room, S.
creator: Abdulkadir, I.
description: Reinforced concrete is used worldwide in the construction industry. In past eras, extensive research has been conducted and has clearly shown the performance of stress�strain behaviour and ductility design for high-, standard-, and normal-strength concrete (NSC) in axial compression. Limited research has been conducted on the experimental and analytical investigation of low-strength concrete (LSC) confinement behaviour under axial compression and relative ductility. Meanwhile, analytical equations are not investigated experimentally for the confinement behaviour of LSC by transverse reinforcement. The current study experimentally investigates the concrete confinement behaviour under axial compression and relative ductility of NSC and LSC using volumetric transverse reinforcement (VTR), and comparison with several analytical models such as Mender, Kent, and Park, and Saatcioglu. In this study, a total of 44 reinforced-column specimens at a length of 18 in with a cross-section of 7 in � 7 in were used for uniaxial monotonic loading of NSC and LSC. Three columns of each set were confined with 2 in, 4 in, 6 in, and 8 in c/c lateral ties spacing. The experimental results show that the central concrete stresses are significantly affected by decreasing the spacing between the transverse steel. In the case of the LSC, the core stresses are double the central stress of NSC. However, increasing the VTR, the capacity and the ductility of NSC and LSC increases. Reducing the spacing between the ties from 8 in to 2 in center to center can affect the concrete column�s strength by 60 in LSC, but 25 in the NSC. The VTR and the spacing between the ties greatly affected the LSC compared to NSC. It was found that the relative ductility of the confined column samples was almost twice that of the unrestrained column samples. Regarding different models, the Menders model best represents the performance before the ultimate strength, whereas Kent and Park represents post-peak behaviour. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
publisher: MDPI AG
date: 2021
type: Article
type: PeerReviewed
identifier:   Ali, M. and Abbas, S. and Salah, B. and Akhter, J. and Saleem, W. and Haruna, S. and Room, S. and Abdulkadir, I.  (2021) Article investigating optimal confinement behaviour of low-strength concrete through quantitative and analytical approaches.  Materials, 14 (16).   ISSN 19961944     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113377026&doi=10.3390%2fma14164675&partnerID=40&md5=b663f9a396031f020b901be1af4fc30a
relation: 10.3390/ma14164675
identifier: 10.3390/ma14164675