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Bond behaviour of substandard splices in RC beams externally confined with CFRP
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Garcia, Reyes, Helal, Yasser, Pilakoutas, Kypros and Guadagnini, Maurizio (2014) Bond behaviour of substandard splices in RC beams externally confined with CFRP. Construction and Building Materials, 50 . pp. 340-351. doi:10.1016/j.conbuildmat.2013.09.021 ISSN 0950-0618.
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Official URL: http://dx.doi.org/10.1016/j.conbuildmat.2013.09.02...
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.
| Item Type: | Journal Article | |||||||||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | |||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | |||||||||||||||
| Library of Congress Subject Headings (LCSH): | Concrete beams, Carbon fiber-reinforced plastics | |||||||||||||||
| Journal or Publication Title: | Construction and Building Materials | |||||||||||||||
| Publisher: | Elsevier | |||||||||||||||
| ISSN: | 0950-0618 | |||||||||||||||
| Official Date: | 15 January 2014 | |||||||||||||||
| Dates: |
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| Volume: | 50 | |||||||||||||||
| Page Range: | pp. 340-351 | |||||||||||||||
| DOI: | 10.1016/j.conbuildmat.2013.09.021 | |||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
| Date of first compliant deposit: | 20 March 2019 | |||||||||||||||
| Date of first compliant Open Access: | 26 March 2019 | |||||||||||||||
| RIOXX Funder/Project Grant: |
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