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Behaviour of over‐reinforced high‐strength concrete beams confined with post‐tensioned steel straps – an experimental investigation
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Ma, Chau‐Khun, Awang, Abdullah Zawawi, Garcia, Reyes, Omar, Wahid and Pilakoutas, Kypros (2016) Behaviour of over‐reinforced high‐strength concrete beams confined with post‐tensioned steel straps – an experimental investigation. Structural Concrete, 17 (5). pp. 768-777. doi:10.1002/suco.201500062
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Official URL: https://doi.org/10.1002/suco.201500062
Abstract
This study examines the flexural behaviour of high‐strength concrete (HSC) beams confined using an innovative steel strapping tensioning technique (SSTT) able to provide active confinement. Twelve over‐reinforced HSC beams (fc = 50 or 80 MPa) were designed to fail prematurely by concrete crushing at mid‐span. The mid‐span region of eight such beams was confined externally using the SSTT with different steel strap confinement ratios, the aim of which was to delay concrete crushing. The test results are discussed in terms of the failure modes, load‐deflection response and the concrete and tensile reinforcement strains observed. Although the unconfined beams failed in a brittle manner with no post‐peak deflection, the steel straps were very effective at enhancing the post‐peak deformation of the SSTT‐confined beams by up to 126 %. Moreover, for the beams tested in this study, the use of the SSTT led to failures after yielding of the tensile reinforcement. The proposed SSTT can be used to confine HSC elements where ductility is required.
| Item Type: | Journal Article | ||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction |
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| Divisions: | Faculty of Science > Engineering | ||||||||
| Library of Congress Subject Headings (LCSH): | Concrete beams -- Testing, Earthquake engineering | ||||||||
| Journal or Publication Title: | Structural Concrete | ||||||||
| Publisher: | Wiley-Blackwell Publishing Ltd. | ||||||||
| ISSN: | 1464-4177 | ||||||||
| Official Date: | December 2016 | ||||||||
| Dates: |
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| Date of first compliant deposit: | 13 March 2019 | ||||||||
| Volume: | 17 | ||||||||
| Number: | 5 | ||||||||
| Page Range: | pp. 768-777 | ||||||||
| DOI: | 10.1002/suco.201500062 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Publisher Statement: | This is the peer reviewed version of the following article: Ma, C. , Awang, A. Z., Garcia, R. , Omar, W. and Pilakoutas, K. (2016), Behaviour of over‐reinforced high‐strength concrete beams confined with post‐tensioned steel straps – an experimental investigation. Structural Concrete, 17: 768-777. doi:10.1002/suco.201500062, which has been published in final form at https://doi.org/10.1002/suco.201500062. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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