Garcia, R., Helal, Y., Pilakoutas, K. et al. (1 more author) (2014) Bond behaviour of substandard splices in RC beams externally confined with CFRP. Construction and Building Materials, 50. 340 - 351. ISSN 0950-0618
Abstract
Bond splitting failures of substandard lap-spliced columns have led to collapse of many RC buildings during recent earthquakes in developing countries. The strengthening of lap-spliced regions with CFRP confinement can reduce the seismic vulnerability of such buildings. This paper investigates bond splitting using flexural tests on twelve RC beams with substandard lap splices (25 bar diameters) at midspan. Different confinement configurations (no confinement, internal stirrups or CFRP sheets), concrete covers and bar sizes are examined at the splice region. The results show that light CFRP confinement enhances the splice bond strength by up to 65% compared to unconfined specimens. Predictive equations from the literature are shown to yield a large scatter in results and to overestimate the strain developed in the CFRP confinement. An alternative approach to calculate the confinement strain and the additional bond strength provided by CFRP confinement is proposed and validated.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2014 Elsevier. This is an author produced version of a paper subsequently published in Construction and Building Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Substandard lap splices; Seismic strengthening; RC beams; CFRP confinement; Bond-splitting strength; Bar slip |
Dates: |
|
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: | 14 Mar 2014 13:59 |
Last Modified: | 05 Nov 2017 23:09 |
Published Version: | http://dx.doi.org/10.1016/j.conbuildmat.2013.09.02... |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.conbuildmat.2013.09.021 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:78007 |