Nematzadeh, M., Hajirasouliha, I. orcid.org/0000-0003-2597-8200, Haghinejad, A. et al. (1 more author) (2017) Compressive behaviour of circular steel tube-confined concrete stub columns with active and passive confinement. Steel and Composite Structures, 24 (3). pp. 323-337. ISSN 1229-9367
Abstract
This paper presents the results of a comprehensive experimental investigation on the compressive behaviour of steel tube-confined concrete (STCC) stub columns with active and passive confinement. To create active confinement in STCC columns, an innovative technique is used in which steel tube is laterally pre-tensioned while the concrete core is simultaneously pre-compressed by applying pressure on fresh concrete. A total of 135 STCC specimens with active and passive confinement are tested under axial compression load and their compressive strength, ultimate strain capacity, axial and lateral stress‒ strain curves and failure mode are evaluated. The test variables include concrete compressive strength, outer diameter to wall thickness ratio of steel tube and prestressing level. It is shown that applying active confinement on STCC specimens can considerably improve their mechanical properties. However, applying higher prestressing levels and keeping the applied pressure for a long time do not considerably affect the mechanical properties of actively confined specimens. Based on the results of this study, new empirical equations are proposed to estimate the axial strength and ultimate strain capacity of STCC stub columns with active and passive confinement.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Techno-press, 2017. |
Keywords: | Compressive behaviour; Pre-compressed concrete; Active confinement; Steel tubeconfined concrete; Stub column |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 19 May 2017 12:20 |
Last Modified: | 26 Oct 2017 10:38 |
Published Version: | https://doi.org/10.12989/scs.2017.24.3.323 |
Status: | Published |
Publisher: | Techno-press |
Refereed: | Yes |
Identification Number: | 10.12989/scs.2017.24.3.323 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:116612 |