Helal, Y., Garcia, R., Pilakoutas, K. et al. (2 more authors) (2014) Strengthening of short splices in RC beams using Post-Tensioned Metal Straps. Materials and Structures/Materiaux et Constructions. December 2014. ISSN 1359-5997
Abstract
This paper investigates the effectiveness of a novel and cost-effective strengthening technique using Post-Tensioned Metal Straps (PTMS) at enhancing the bond behaviour of short lap spliced steel bars in reinforced concrete (RC) beams. Twelve RC beams with a short lap splice length of 10db (db = bar diameter) at the midspan zone were tested in flexure to examine the bond splitting failure. The effect of confinement (no confinement, internal steel stirrups or external PTMS), bar diameter and concrete cover were examined. The results show that, whilst unconfined control beams failed prematurely due to cover splitting, the use of PTMS confinement enhanced the bond strength of the spliced bars by up to 58 % and resulted in a less brittle behaviour. Based on the test results, a new analytical model is proposed to predict the additional bond strength provided by PTMS confinement. The model should prove useful in the strengthening design of substandard lap spliced RC elements.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 Springer. This is an author produced version of a paper subsequently published in Materials and Structures/Materiaux et Constructions. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Bar slip; Confinement; Lap splice; Post-Tensioned Metal Straps; RC beams; Seismic strengthening |
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: | 15 Jan 2015 10:51 |
Last Modified: | 21 Mar 2018 23:01 |
Published Version: | http://dx.doi.org/10.1617/s11527-014-0481-6 |
Status: | Published |
Publisher: | Springer |
Refereed: | Yes |
Identification Number: | 10.1617/s11527-014-0481-6 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:82550 |